SMC AR20-D Regulator Operation Manual PDF

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Summary of Content for SMC AR20-D Regulator Operation Manual PDF

Doc. No. AR-OMX0055-B

PRODUCT NAME

Regulator

MODEL / Series / Product Number

AR20(K)-(F,N)01(F,N)02(B,E,E1,E2,E3,E4,G,H,J,M)(-1,N,R,Y,Z,ZA)-D

AR30(K)-(F,N)02(F,N)03(B,E,E1,E2,E3,E4,G,H,J,M)(-1,N,R,Y,Z,ZA)-D

AR40(K)-(F,N)02(F,N)04(B,E,E1,E2,E3,E4,G,H,J,M)(-1,N,R,Y,Z,ZA)-D

AR40(K)-(F,N)06(B,E,E1,E2,E3,E4,G,H,J,M)(-1,N,R,Y,Z,ZA)-D

AR50(K)-(F,N)06(F,N)10(B,E,E1,E2,E3,E4,G,M)(-1,N,R,Y,Z,ZA)-D

AR60(K)-(F,N)10(B,E,E1,E2,E3,E4,G,M)(-1,N,R,Y,Z,ZA)-D

Contents

Page

1. Safety Instructions 2-6

2. Application 7

3. Standard Specifications 7

4. How to Order 8

5. Options 9

6. Structural Drawing and Replacement Parts 10

7. Assembly of Optional Parts 11-12

8. Operation and Adjustment 13-14

9. Trouble Shooting 15-16

10. How to Replace the Components 17-24

10-1. Diaphragm Assembly Replacement 17

10-2. Valve Guide Assembly and Valve Assembly Replacement 18

10-3. Square Embedded Type Pressure Gauge Replacement 19

10-4. Right angle square type pressure gauge Replacement 20

10-5. Blanking Plate Assembly Replacement 21

10-6. Check Valve Assembly Replacement 22

10-7. Plug (with O-ring) Replacement AR20(K) to 60(K) 23

10-8. Plug Assembly Replacement AR20K to 60K 24

11. Disassembly Drawing 25-27

12. Dimensions 28-30

-1-

Safety Instructions These safety instructions are intended to prevent hazardous situations and/or equipment damage. These instructions indicate the level of potential hazard with the labels of Caution, Warning or Danger. They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC)*1) , and other safety regulations. *1) ISO 4414: Pneumatic fluid power -- General rules relating to systems. ISO 4413: Hydraulic fluid power -- General rules relating to systems. IEC 60204-1: Safety of machinery -- Electrical equipment of machines .(Part 1: General requirements) ISO 10218: Manipulating industrial robots -Safety. etc.

Caution Caution indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.

Warning Warning indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury.

Danger Danger indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

Warning 1. The compatibility of the product is the responsibility of the person who designs the equipment or

decides its specifications. Since the product specified here is used under various operating conditions, its compatibility with specific equipment must be decided by the person who designs the equipment or decides its specifications based on necessary analysis and test results. The expected performance and safety assurance of the equipment will be the responsibility of the person who has determined its compatibility with the product. This person should also continuously review all specifications of the product referring to its latest catalog information, with a view to giving due consideration to any possibility of equipment failure when configuring the equipment.

2. Only personnel with appropriate training should operate machinery and equipment. The product specified here may become unsafe if handled incorrectly. The assembly, operation and maintenance of machines or equipment including our products must be performed by an operator who is appropriately trained and experienced.

3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed. 1.The inspection and maintenance of machinery/equipment should only be performed after measures to

prevent falling or runaway of the driven objects have been confirmed. 2.When the product is to be removed, confirm that the safety measures as mentioned above are implemented and the power from any appropriate source is cut, and read and understand the specific product precautions of all relevant products carefully. 3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.

4. Contact SMC beforehand and take special consideration of safety measures if the product is to be used in any of the following conditions. 1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to direct sunlight. 2. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,

vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or other applications unsuitable for the standard specifications described in the product catalog.

3. An application which could have negative effects on people, property, or animals requiring special safety analysis.

4.Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a mechanical protective function, and periodical checks to confirm proper operation.

-2-

Safety Instructions

Caution The product is provided for use in manufacturing industries.

The product herein described is basically provided for peaceful use in manufacturing industries. If considering using the product in other industries, consult SMC beforehand and exchange specifications or a contract if necessary.

If anything is unclear, contact your nearest sales branch.

Limited warranty and Disclaimer/Compliance Requirements The product used is subject to the following Limited warranty and Disclaimer and Compliance Requirements. Read and accept them before using the product.

Limited warranty and Disclaimer

1.The warranty period of the product is 1 year in service or 1.5 years after the product is

delivered,whichever is first.2) Also, the product may have specified durability, running distance or replacement parts. Please consult your nearest sales branch.

2. For any failure or damage reported within the warranty period which is clearly our responsibility, a replacement product or necessary parts will be provided. This limited warranty applies only to our product independently, and not to any other damage

incurred due to the failure of the product. 3. Prior to using SMC products, please read and understand the warranty terms and disclaimers

noted in the specified catalog for the particular products.

2) Vacuum pads are excluded from this 1 year warranty. A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.

Also, even within the warranty period, the wear of a product due to the use of the vacuum pad or failure due to the deterioration of rubber material are not covered by the limited

warranty.

Compliance Requirements

1. The use of SMC products with production equipment for the manufacture of weapons of mass destruction(WMD) or any other weapon is strictly prohibited.

2. The exports of SMC products or technology from one country to another are governed by the relevant security laws and regulation of the countries involved in the transaction. Prior to the shipment of a SMC product to another country, assure that all local rules governing that export are known and followed.

Caution SMC products are not intended for use as instruments for legal metrology. Measurement instruments that SMC manufactures or sells have not been qualified by type approval tests relevant to the metrology (measurement) laws of each country.

Therefore, SMC products cannot be used for business or certification ordained by the metrology

(measurement) laws of each country.

-3-

Precautions for Design

Warning

(1) Polyacetal resin parts are used for the exterior. Organic solvents including thinner, acetone,

alcohol and ethylene chloride; chemicals including sulphuric acid, nitric acid and hydrochloric acid;

cutting oil, synthetic oils, ester-based compressor oil, alkali, kerosene, gasoline, lock material of

screw are harmful. Do not use the product where these are present.

(2) Consult SMC if no leakage is allowed due to the environment, or if the operating fluid is not air.

(3) Shield from ultra violet light and radiation with protective cover.

(4) A safety device needs to be installed if output pressure is exceeding the set pressure, otherwise

this can cause breakage of outlet device and equipment or lead to malfunction.

Caution

(1) Allowed air consumption from the exhaust port is 0.1 L/min(ANR) or less.

Selection

Warning

(1) Grease used on the internal sliding parts and seals may flow to the outlet side. If this is not

acceptable, please consult SMC.

(2) Residual pressure of product without backflow function is released unstably even though the inlet

pressure is released (residual pressure might be left in the product). Please select product with

backflow function to release the residual pressure completely.

(3) Long absence of operation or operation with sealed circuit or balancing circuit on the outlet side

may cause set pressure fluctuation. Please consult SMC if this is not acceptable.

(4) Set range of outlet pressure shall be 85% or less of the inlet pressure. Operating at a setting

exceeding 85% causes the outlet pressure to be easily affected by fluctuations in flow rate and inlet

pressure, leading to instability.

(5) Since the safety margin is calculated to the maximum value of the set pressure range shown in the

specification table, the pressure setting may be over the maximum value. However, use the

product within the specified range.

(6) If the product is used with circuit which requires high exhaust sensitivity or set precision, please

consult SMC.

Installation

Warning

(1) Connect the product ensuring the direction of "1"(IN) and "2"(OUT) for air direction and indicated

arrow. Incorrect connections may cause malfunction.

(2) Install with enough space around the regulator to perform regular maintenance and operation.

Refer to section [12.Dimensions] (p. 28 and p. 30) for necessary space.

(3) Do not drop or apply impact during transportation or installation. Damage of products or pressure

gauge can result in malfunction.

(4) Do not install in areas with high humidity or high temperature. It may lead to a malfunction of the

pressure gauge.

-4-

Adjustment

Warning

(1) Adjust the set pressure ensuring correct inlet and outlet pressures. Turning the knob excessively

can cause damage to the internal parts.

(2) Do not use tools on the pressure regulator knob as this may cause damage. It must be operated

manually.

Caution

(1) For the product with a pressure gauge, do not apply pressure exceeding the maximum scale of the

pressure gauge in order to protect the gauge.

(2) Adjust the pressure whilst the pressure is increasing. Pressure may become lower than the set

pressure if adjusted by decreasing the value. Rotate the knob clockwise to increase the set

pressure. Counterclockwise to decrease the pressure. Moreover, please lock the knob after setting

pressure.

(3) For the regulator with backflow function, upstream pressure needs to be higher than downstream

pressure by 0.05 MPa or more.

(4) Outlet pressure may rise when the inlet pressure is discharged and resupplied after pressure

setting. In this case, consume air at the outlet which will bring the pressure closer to the set

pressure.

(5) Outlet pressure may change if the product is used for a long period of time. Please confirm the set

pressure regularly.

(6) When pressure difference between the inlet side and the outlet side is large, chattering may occur.

In that case, please reduce the pressure difference between the inlet and the outlet. Please consult

SMC it chattering continues.

Piping

Warning

(1) Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to

remove chips, cutting oil and solid foreign material from inside the pipe. Contamination of piping

may cause damage or malfunction.

(2) When screwing together pipes and fittings, etc., be certain that chips from the pipe threads and

sealant do not get inside the pipe. When a sealant tape is used, leave 1.5 to 2 thread ridges

exposed at the end of the threads.

(3) Connect piping/fittings using the recommended torque while holding the female thread side tightly.

Insufficient tightening torque leads to cause of loosening or sealing failure, and excessive

tightening torque leads to cause of breakage of screws. Tightening without holding female thread

applies an excessive force to the piping bracket directly, leading to breakage.

Recommended tightening torque for the port Unit: N m

Thread size 1/8 1/4 3/8 1/2 3/4 1

Torque 7 to 9 12 to 14 22 to 24 28 to 30 28 to 30 36 to 38

Recommended tightening torque for the pressure gauge port Unit: N m

Thread size 1/8

Torque 3 to 5

*Please refer to "10-7. Replacing the plug (with O-ring)" (P23), Replacement parts For the tightening torque of the plug (with O-ring).

(4) Before using an SMC fitting and S coupler, please refer to "Tightening the threaded portion of the

connection thread" of the Fittings & Tubing Precautions.

(5) Do not apply torsion or bending moment other than the weight of the product itself. External piping

needs to be supported separately as it may cause breakage. Non-flexible piping like steel tube is

susceptible to excessive moment load or vibration. Insert flexible tubes to prevent this.

-5-

Air Source

Warning

(1) Use clean air. Do not use compressed air containing chemicals, organic solvent, synthetic oil or

corrosive gas as it may be cause of breakage of components or operation failure.

(2) Air containing too much moisture may cause malfunction. Install an air drier or aftercooler before

the regulator.

Maintenance

Warning

(1) Release the pressure in the product to the atmosphere when replacing parts or removing piping.

(2) Maintenance and checks should be done by following the procedure in this operation manual.

Incorrect handling of the product may cause breakage or operation failure of the equipment or

device.

(3) When using the regulator with backflow function between a solenoid valve and an actuator, check

the pressure gauge periodically. Sudden pressure fluctuations may shorten the durability of the

pressure gauge. A digital pressure gauge is recommended for such applications or as deemed

necessary.

Caution

(1) If an emergency countermeasure is to be taken during setting failure or exhaust leakage, the

internal valve seating part should be checked. If failure such as foreign matter is found, remove it

before performing the emergency countermeasure.

-6-

2. Application This product aims at controlling pressure of air lines.

3. Standard Specifications

-7-

Model AR20-D AR30-D AR40-D AR40-06-D AR50-D AR60-D

Port size 1/8, 1/4 1/4, 3/8 1/4, 3/8, 1/2 3/4 3/4, 1 1

Pressure gauge port size Note 1)

Fluid

Ambient and fluid temperature Note 2)

Proof pressure

Max. operating pressure

Set pressure range

Construction

Weight 0.14kg 0.27kg 0.48kg 0.51kg 1.13kg 1.25kg

Note 1) Pressure gauge connection threads are not available for F.R.L. units with a square embedded type pressure gauge,

a right angle square type pressure gauge, or with a digital pressure switch.

Note 2) -5 to 50 o C for the products with the digital pressure switch.

Relieving type

1/8

Air

-5 to 60 o C (No freezing)

1.5 MPa

1.0 MPa

0.05 to 0.85 MPa

4. How to Order

AR - - - D

-8-

30 K 03 BE

Note 1) Option and Semi-standard: Select one each for a to g.

Note 2) : For NPT thread type only.

Note 3) : Select with an option E1, E2, E3 or E4.

20 30 40 50 60 Nil K Nil N F 01 02 03 04 06 10 Nil Without mounting option B With bracket H With set nut (for panel mount) Nil Without pressure gauge E Square embedded type pressure gauge (with limit indicator) G Round type pressure gauge (with limit indicator) J Right angle square type pressure gauge (with limit indicator) M Round type pressure gauge (with color zone) E1 NPN output / Wiring bottom entry E2 NPN output/ Wiring top entry E3 PNP output / Wiring bottom entry E4 PNP output/ Wiring top entry Nil 0.05 to 0.85 MPa setting 1 0.02 to 0.2 MPa setting

Nil Relieving type N Non-relieving type Nil Flow direction: Left to right R Flow direction: Right to left Nil Downward Y Upward

Nil Unit on product label: MPa, Pressure gauge in SI units: MPa Z Unit on product label: psi, Pressure gauge: MPa/psi dual scale Note 2) Note 2) Note 2) Note 2) Note 2)

ZA Digital pressure switch: With unit selection function Note 3) Note 3) Note 3) Note 3) Note 3)

3/8 1/2

Knob

g Unit indication

c Set pressure

d Exhaust

mechanism

e

Description

Without backflow function With backflow function

Rc NPT G

Digital

pressure

switch

S e m

i- s ta

n d a rd

Flow direction

f

Thread type

O p ti o n

a Mounting

b

Pressure

gauge

Symbol

Body size

Port size

3/4 1

With backflow function

1/8 1/4

5. Options

-9-

Options

AR20-D AR30-D AR40-D AR40-06-D AR50-D AR60-D

(1) Bracket assembly Note 1)

AR23P-270AS AR33P-270AS

(2) Set nut AR23P-260S AR33P-260S

Rc

Z : Both in MPa and psi

G

Rc

NPT

G

NPT Z : Both in MPa and psi

(5) Pressure gauge cover assembly

NPT Z : Both in MPa and psi

NPT Z : Both in MPa and psi

NPT Z : Both in MPa and psi

Note)

Note 1)

Note 2)

Note 3)

Note 4) In addition to the pressure gauge with a right angle adapter assembled, an adapter, lock pin, O-ring (1 pc.) and mounting screws (2 pcs.) are Included.

Note 5) In addition to the pressure gauge with a right angle adapter assembled, an O-ring (1 pc.) is included.

Note 6)

Right angle square type pressure gauge

assembly Note5)

GC3-10AS-JB-D

GC3-P10AS-JB-D-X30 (8)

Right angle square type pressure gauge Note 3) GC3-10AS-J-D

GC3-P10AS-J-D-X30

Right angle square type pressure gauge

(with mounting accessories) Note 4)

(6)

(7) GC3-10AS-JA-D

(9) : Unit selection function

: Unit selection function

Initial setting: psi

Pressure gauge Note 2)

(Round type)

G36-10-01

Square embedded type pressure gauge Note 3)

(Including part (5))

GC3-10AS-D

G46-10-N01-L

G46-10-01-L

G46-4-01 (Rc type) / G46-4-N01 (NPT type) / G46-P4-N01-X30 (NPT, Z type).

Part number for 0.2 MPa: G36-4-01 (Rc type) / G36-4-N01 (NPT type) / G36-P4-N01-X30 (NPT, Z type).

NPT

G36-10-N01

G36-10-01

Z

Digital pressure switch

(with accessories for mounting) ZA

G36-P10-N01-X30

G36-10-N01-L

G36-10-01-L

(4)

(3)

NPT

With O-ring (1 pc.) and mounting screw s (2 pcs.). Part number for 0.2 MPa: GC3-4AS(-J)-D (Rc, NPT type) / GC3-P4AS(-J)-D-X30 (NPT, Z type).

Assembly of 2 types of bracket and 2 set screws.

G46-10-01

G46-10-01-L

The numbers in the table and structural drawings are consistent with the numbers in sections [10. How to Replace the Components] (P17-24) and [11. Disassembly Drawing] (P25-27).

This is an assembly of a bracket and set nut (2).

No. Part name Piping

thread

type

Semi-standard specification

G36-10-01-L Pressure gauge

Note 2)

(Round type, with color zone)

Part No.

AR43P-270AS AR54P-270AS Note 4)

AR43P-260S

ISE35-R-65-MLA-X523

ISE35-R-25-LA-X523

G46-10-01

G46-10-N01

G46-P10-N01-X30

GC3-P10AS-D-X30

136150A

ISE35-N-25-PLA-X523

ISE35-N-65-PLA-X523

Output specification

NPN

PNP

GC3-P10AS-JA-D-X30

NPN

PNP

Top entry wiring

ISE35-R-25-MLA-X523

ISE35-R-65-LA-X523

ISE35-R-25-PLA-X523

ISE35-R-65-PLA-X523

NPN

PNP

Bottom entry wiring

ISE35-N-25-MLA-X523

ISE35-N-65-MLA-X523

ISE35-N-25-LA-X523

ISE35-N-65-LA-X523

Without pressure gauge/

With round type pressure gauge

(Backflow function: No)

Without pressure gauge/

With round type pressure gauge

(Backflow function: Yes)

With square embedded type pressure gauge With right angle square type pressure gauge With digital pressure switch

(Backflow function: No/Yes)

AR50-D/AR60-DAR20-D/AR30-D/AR40-D

(3) (3) (4)

(5)

(7)

(8)

(6) (9)

(1)

(2)

6Structural Drawing and Replacement Parts

-10-

Construction/ Common replacement parts

Without pressure gauge/

With round type pressure gauge

(Backflow function: No)

With square embedded type pressure gauge/

With digital pressure switch

(Backflow function: No)

Without pressure gauge/With round type pressure gauge

With square embedded type pressure gauge/With digital pressure switch

(Backflow function: Yes)

(10)

(11)

(12)

(17)

(13)

(13)

(14)

(15)

(16)

(13)

Replacement parts

AR20-D AR30-D AR40-D AR40-06-D AR50-D AR60-D

(10) Valve assembly AR24P-060AS AR34P-060AS AR44P-060AS AR49P-060AS AR54P-060AS AR64P-060AS

: Relief AR24P-150AS AR34P-150AS

N : Non-relief AR24P-150AS-N AR34P-150AS-N

(12) Valve guide assembly AR24P-050AS AR34P-050AS

Rc/G

NPT

(14) Blanking plate assembly

Rc

NPT

G

(16) Check valve assembly

(17) Check valve plug assembly

Note) The numbers in the table and structural drawings are consistent with the numbers in sections [10. How to Replace the Components] (P17-24) and

[11. Disassembly Drawing] (P25-27).

AR24P-370AS-01

AR24P-370AS-N01

AR24P-250AS

AR24P-320AS-01

AR24P-320AS-N01

AR24P-320AS-F01

AR24KP-020AS

AR20KP-090AS

Part No.

AR44P-150AS AR54P-150AS

AR44P-150AS-N AR54P-150AS-N

AR44P-050AS AR54P-050AS

Piping

thread

type

Semi-standard

specification

(11) Diaphragm assembly

No. Part name

(15) Plug assembly

Including part (13))

(13) Plug (with O-ring)

7. Assembly of Optional Parts

7-1. AR20-D/ AR30-D/ AR40-D Bracket (Panel mount)

1) Bracket mounting

2) Secure with the set nut

3) Tightening

* When retightening

7-2. AR50-D/ AR60-D Bracket

1) Mounting of bracket A

2) Mounting of bracket B

-11-

Please use a hook wrench on the grooves of the set nut.

After hand tightening, follow the values in the table below

for retightening.

Mount the bracket to the regulator as shown in the picture.

Assemble so that the rotation stopper of the regulator and

the bracket are engaged properly.

Ensure that the knurled faces of the bracket and the set

nut are facing each other.

Turn the set nut while the regulator is aligned correctly

with the bracket. The knurling of the bracket and set nut

stops loosening of the screw. Usually, these can be

tightened adequately by hand. (Extra tightening is

recommended for panel mounting).

Fix the bracket B with the set screw (2 pcs.) included in

the package. Refer to the table below for the tightening

torque.

Insert bracket A from the front of the regulator so that the

fingers of the bracket A hold the regulator at the groove

and the bottom of the body.

Rotation stopper

Grooves for applying wrench

Set nut

Bracket

Regulator

Model Tool size Amount of

retightening Reference torque

AR20-D 34/38 2.0+/-0.2 N m

AR30-D 52/55 3.5+/-0.3 N m

AR40-D 52/55 4.0+/-0.4 N m

2 to 5 notch

Model Tool Reference torque

AR50-D

AR60-D Phillips screwdriver 1.5+/-0.2 N m

Regulator

Groove

Bracket B

Bracket A Fingers

Set screw (2 pcs.)

(Knurled face)

(Knurled face)

Bottom of the body

7-3. Pressure gauge (round type)

1) Pressure gauge mounting (round type)

Wrench size

Note 1) Positioning of pressure gauge

Note 2)

Note 3) Torque control

-12-

Before mounting the pressure gauge onto the pressure

gauge port of the regulator, confirm that sealing material

has been applied to the pressure gauge.

Please refer to "Piping" on page 5 when using sealing

tape.

Please use the value in the torque table described in

"Piping" on page 5.

No plug is mounted onto the pressure gauge port of

product with a round type pressure gauge.

Adjust the pressure gauge position by tightening it.

Adjustment in loosening direction may cause air leakage.

Pressure gauge (round type)

Regulator

Pressure gauge port

Wrench flats

Model Tool size

AR20-D

AR30-D

AR40-D

AR50-D

AR60-D

14

8. Operation and Adjustment

8-1. Pressure regulation

8-2. Indicator adjustment of the square embedded type pressure gauge

-13-

Knob

Orange mark

(1) Pull the knob in the arrow direction for unlocking, revealing an orange mark.

(2) Turning the knob clockwise increases the outlet pressure. When the knob of the relief type is rotated counterclockwise, pressure decreases. Note) Adjust the pressure in pressure increasing direction (rotate in the arrow direction). Otherwise, it may cause insufficient set pressure.

(3) After adjusting pressure, lock the knob by pushing it in the arrow direction.

Opening of transparent cover Indicator (green)

(1) Pull the opening of the transparent cover to unlock.

(2) Open the transparent cover as in the drawing and adjust the indicator to the upper and lower limit positions to be controlled.

(3) Close the transparent cover after adjusting the indicator.

8. Operation and Adjustment

8-3. Adjustment of the right angle square type pressure gauge

-14-

Example: Rotate by 90 degrees from standard orientation

Pressure gauge scale plate

Pressure gauge

cover assembly

Example: Rotate by 90 degrees from standard orientation

Right angle square type

pressure gauge assembly

Adjustment of mounting orientation of pressure gauge

The pressure gauge is secured to the product by means of a lock pin and by removing the lock pin,

it is possible to adjust the mounting orientation of the gauge in 90 degree rotations.

When adjusting the orientation, follow the procedures 1) of Disassembly and 9) and 10) of Assembly

in 10-4. Right Angle Square Type Pressure Gauge Replacement (P20).

Adjustment of orientation of pressure gauge scale plate

The pressure gauge is secured to the right angle adapter by means of screws and by removing the screws, it is possible to adjust the mounting orientation of the scale plate in 90 degrees rotations. When adjusting the orientation of the pressure gauge scale plate, follow the procedures 1) to 3) of Disassembly and 6) to 10) of Assembly in 10-4. Right Angle Square Type Pressure Gauge Replacement (P20).

O-ring

Mounting screws

Right angle adapter

Lock pin

Adapter

Product

9. Trouble Shooting

Refer to sections [10. How to Replace the Components] (P17-24) and [11. Disassembly Drawing] (P25-27).

Category Failure

-15-

Page for

reference

Note) Fluorine grease is recommended when applying additional grease.

Trouble CountermeasurePossible cause

Air pressure is not supplied to the inlet.

The product is installed opposite to the

flow direction.

Pressure regulating spring is damaged.

Valve spring is damaged.

Foreign materials caught in the rubber

seat of the valve or the O-ring on the

valve sliding part.

Seating part of the valve is damaged.

Foreign materials caught in the seating

part of the check valve.

Foreign materials caught in the seating

part or O-ring of the valve.

Rubber seat of the valve is damaged.

Valve spring is damaged.

The valve is fixed in an opened position.

The product is installed opposite to the

flow direction.

Diaphragm is damaged.

Foreign materials caught in seating part

of the exhaust valve.

Foreign materials caught in the seating

part or O-ring of the valve.

Rubber seat of the valve assembly is

damaged.

Foreign materials caught in the seating

part of the check valve.

Replace the check valve assembly.

Replace the valve assembly.

Replace the check valve assembly.

Replace the valve assembly.

Remove the valve guide to clean the valve,

valve seating part and valve O-ring. And

then, apply grease to the O-ring and sliding

part of the valve.

Clean the seating part of the relief valve or

replace the diaphragm assembly.

Replace the diaphragm assembly.

Install the product correctly after confirming

the direction of flow.

Replace the valve guide assembly and

valve assembly.

Replace the valve spring.

Replace the pressure regulating spring.

Install the product correctly after confirming

the direction of flow. "1 indicates the IN

and "2 indicates the OUT.

Check the supply pressure. Ensure that the

supply side ball valve is opened.

P17

P18

P18

P18

P22

P18

P22

P18

P18

P18

P18

1.

2.

P17

P17

P18

Clean the valve sliding surface of O-ring

and apply grease additionally.

Replace the valve spring.

Replace the valve assembly.

Remove the valve and eliminate foreign

materials.

When the condition is not improved,

replace the valve guide assembly and valve

assembly.

A ir l e a k a g e

P re

s s u re

1.

2.

3.

1.

2.

3.

4.

5.

4.

5.

3.

4.

The pressure

can not be

adjusted.

The set pressure

does not

become zero

even when the

knob is

loosened.

Air leaks from

the bonnet

exhaust port.

6.

6.

7.

Refer to sections [10. How to Replace the Components] (P17-24) and [11. Disassembly Drawing] (P25-27).

Category Failure

-16-

Trouble Possible cause Countermeasure

Page for

reference

Air leaks from

the bonnet

exhaust port.

B a c k w

a rd

f lo

w A

ir l e a k a g e

Foreign materials caught in the sliding

part of check valve, leading to

malfunction; or the check valve is fixed in

a closed position.

P22

Note) Fluorine grease is recommended when applying additional grease.

Air leaks from

between the

bonnet and the

body.

Air does not flow

backwards.

2. Replace the check valve assembly.

P8

P17

P17

Revise the air circuit so that back pressure

does not exceed the set pressure.

Fasten the bonnet.

Replace the diaphragm assembly.

Check the product number if backflow

function is equipped.

Back pressure exceeding the set

pressure is applied to the downstream.

Loosened bonnet screws.

Diaphragm is damaged.

Product without backflow function is

used.

7.

1.

2.

1.

10. How to Replace the Components

Warning

Before replacement, make sure that no pressure remains in the epuipment.

Also, make sure to loosen the knob of the regulator so that the set pressure is zero.

After replacement, confirm that the product satisfies specific functions and no external leakage occurs before operating it.

10-1. Diaphragm Assembly Replacement

-17-

1)

2)

3)

4)

5)

AR20

AR30

AR40

AR50

AR60

Disassembly

Assembly

Direction of diaphragm

assembly and pressure

regulating screw assembly

-

Remove the pressure regulating screw assembly,

pressure regulating spring, and diaphragm assembly

in that order.

Assemble the diaphragm assembly, pressure

regulating spring, and then pressure regulating screw

assembly.

Assemble the bonnet to the body.

While the convex side of the bonnet is facing the IN

side, mount it onto the body. Then tighten the 4

mounting screws temporarily, before tightening them

diagonally and evenly to fix the bonnet.

AR20/ AR30/ AR40

Phillips screwdriver

AR50/ AR60

Hexagon wrench

Nominal size: 5

-

-

Applicable

model

Work

category Procedure Tool Criteria

Loosen the knob completely before disassembly.

AR20/ AR30/ AR40

Phillips screwdriver

AR50/ AR60

Hexagon wrench

Nominal size: 5

Remove the 4 screws and remove the bonnet.

I N

OUT

Bonnet

Pressure regulating screw

assembly

Pressure regulating spring

(11) Diaphragm assembly

Body

Screws (4 pcs.) Diaphragm assembly (Cross section)

(Seating part of relief valve)

Knob

Tightening torque

AR20

AR30

AR40

AR50

AR60

2.35+/-0.3 N m

3.5 +/-0.3 N m

10-2. Valve Guide Assembly and Valve Assembly Replacement

-18-

Precision

screwdriver (-)

AR20

AR30

AR40

AR50

AR60

Disassembly

Assembly

After replacing the removed components with new

components, place them into the regulator. Assemble

the components in reverse order to the removal

procedure.

(See below for the mounting

direction of the components.)

6)

1)

2)

3)

4)

5)

Tool Criteria

Remove the cover.

Insert round pliers into the small holes of the cover

and rotate 45 degree to the left or right, then lift the

cover to remove.

Remove the cap.

Insert a precision screwdriver (-) between the body

and cap to lift the cap. Precision

screwdriver (-)

Round pliers

Nominal: 125

Applicable

model

Work

category Procedure

Remove the valve guide assembly.

Remove it while lifting the circumferential part with a

precision screwdriver.

Remove the valve spring.

Remove the valve assembly.

Cap

Cover

(12) Valve guide assembly

Valve spring

(10) Valve assemby

Regulator

Precision screwdriver (-) inlet

Cap

Round pliers inlet (4 holes)

I N

OUT

Valve sliding O-ring

(10) Valve assembly (upside down)

AR40-D/ AR50-D/ AR60-D

Mount the cover so that the protruded part faces towards the cap.

(Valve seat)

10-3. Square Embedded Type Pressure Gauge Replacement

Note) Applicable to the product with square embedded type pressure gauge (E).

-19-

Presence of the O-ring

Tightening torque:

0.85+/-0.05 N m

Tool Criteria

Phillips

screwdriver

Phillips

screwdriver

Assembly

5)

DisassemblyAR20

AR20K

AR30

AR30K

AR40

AR40K

AR50

AR50K

AR60

AR60K

Applicable

model

Work

category Procedure

Mount the pressure gauge cover.

Set the pressure gauge cover with its arrow on the

lower right corner. Mate the 2 fingers of the pressure

gauge cover with the 2 finger slits of the pressure

gauge, and rotate the pressure gauge cover 15

degrees to the opposite direction of the arrow

(clockwise).

Mount the pressure gauge.

Mount the pressure gauge to the regulator with the

mounting screws and tighten the screws referring to

the tightening torque specified in the right column.

Confirm that the O-ring is mounted onto the pressure

gauge.

When the O-ring comes out or is left on the regulator,

mount the O-ring to the pressure gauge correctly.

Remove the pressure gauge cover.

Rotate the pressure gauge cover 15 degrees in the

arrow direction (counterclockwise) and pull it out.

Remove the pressure gauge.

Remove the 2 mounting screws and remove the

pressure gauge.

1)

2)

3)

4)

(5) Pressure gauge cover assembly

Mounting screws

(2 pcs.)

Pressure gauge

O-ring

(5) Pressure gauge cover assembly

(4) Square embedded type pressure gauge

10-4. Right Angle Square Type Pressure Gauge Replacement

Note) Applicable to the product with right angle square type pressure gauge (J).

-20-

9 Confirm that the O-ring is mounted on the right angle

square type pressure gauge assembly. When the O-

ring has been dropped or is left on the product side,

mount the O-ring to the right angle square type

pressure gauge assembly again.

Presence of the O-ring

10 Mount the right angle square type pressure gauge

assembly. Insert the right angle square type pressure

gauge assembly until it makes contact with the

adapter. In that condition, insert the lock pin again to

the predetermined position.

Lock pin insertion condition

Mount the pressure gauge. Temporarily mount the

pressure gauge to the right angle adapter with the

mounting screws, and then tighten the screws to the

tightening torque specified in the right column to

secure the pressure gauge.

Phillips

screwdriver

Tightening torque:

0.32+/-0.05 N m

8 Mount the pressure gauge cover assembly. Engage

the two fingers of the pressure gauge cover assembly

with the two finger slits of the pressure gauge so that

the arrow on the cover assembly is pointing the lower

right, and rotate the pressure gauge cover by 15

degrees to the direction opposite to the arrow

(clockwise).

Assembly 5 Mount the adapter. Temporarily mount the adapter to

the product in the orientation shown in the figure

below by the mounting screws and tighten the screws

to the tightening torque specified in the right column,

to secure the adapter.

Phillips

screwdriver

Tightening torque:

0.6+/-0.05 N m

6 Confirm that the O-ring is mounted on the pressure

gauge. When the O-ring has been dropped or is left

on the right angle adapter side, mount the O-ring to

the pressure gauge again.

Presence of the O-ring

7

3 Remove the pressure gauge. Remove the two

mounting screws and dismount the pressure gauge

from the right angle adapter.

Phillips

screwdriver

4 Remove the adapter. Remove the two mounting

screws and dismount the adapter from the product. Phillips

screwdriver

2 Remove the pressure gauge cover assembly. Rotate

the pressure gauge cover assembly by 15 degrees in

the arrow direction (counterclockwise) and pull the

cover assembly toward you to dismount it.

Applicable

model

Work

category Procedure Tool Criteria

AR20

AR20K

AR30

AR30K

AR40

AR40K

Disassembly 1 Remove the right angle square type pressure gauge

assembly. Remove the lock pin by using a flat blade

screwdriver. Pull the right angle square type pressure

gauge assembly out from the product.

Precision

screwdriver (-)

Disassembly

Assembly

Lock pin insertion condition

* Insert the lock pin further than

the convex portion to prevent it falling out.

Mounting screws (2 pcs.)

O-ring

Lock pin

Adapter

(8) Right angle square type

pressure gauge assembly

Product

(7) Right angle square type

pressure gauge

(with mounting accessory)

Product

(5) Pressure gauge

cover assembly

Right angle adapter (8) Right angle square type

pressure gauge assembly

Pressure gauge

(6) Right angle square type

pressure gauge

O-ring

Mounting screws (2 pcs.)

10-5. Blanking Plate Assembly Replacement

Note) Applicable to the product with square type pressure gauge (E), right angle square type pressure gauge (J), or

digital pressure switch (E1 to E4).

Not applicable to the product with backflow function.

-21-

3)

Tool

Presence of the O-ring

Phillips

screwdriver

Tightening torque:

0.6+/-0.05 N m

Mount the blanking plate.

Mount the blanking plate to the product with the

mounting screws and tighten the screws referring to

the tightening torque specified in the right column.

Remove the blanking plate.

Remove the 2 mounting screws and remove the

blanking plate.

Confirm that the O-ring is mounted onto the blanking

plate.

When the O-ring comes out or is left on the regulator,

mount the O-ring to the blanking plate correctly.

Criteria

Disassembly

Assembly

AR20

AR30

AR40

AR50

AR60

Work

category Procedure

Phillips

screwdriver

Applicable

model

2)

1)

O-ring

Mounting screws (2 pcs.)

Blanking plate

Product

(14) Blanking plate assembly

10-6. Check Valve Assembly Replacement

Note) Applicable to the product with backflow function.

-22-

2)

1)

Tightening torque:

0.6+/-0.05 N m

Presence of the O-ring

Confirm that the O-ring is mounted onto the check

valve assembly.

When the O-ring comes out or is left on the regulator,

mount the O-ring to the check valve assembly

correctly.

Mount the check valve cover.

Mount the check valve cover to the product with the

mounting screws and tighten the screws referring to

the tightening torque specified in the right column.

Tool Criteria

Phillips

screwdriver

Phillips

screwdriver

Disassembly

Assembly

AR20K

AR30K

AR40K

AR50K

AR60K

Applicable

model

Work

category Procedure

Remove the check valve cover.

Remove the 2 mounting screws and the check valve

cover.

Remove the check valve assembly.

Remove the check valve assembly by pulling it

toward the operator.

4)

3)

O-ring2 pcs.)

Mounting screws (2 pcs.)

Check valve main assembly

Check valve cover

(16) Check valve assembly

Product

10-7. Plug (with O-ring) Replacement

Note) Applicable to the product without pressure gauge.

-23-

Assembly

Disassembly 1)

2)

Remove the plug (with O-ring).

Assemble the plug (with O-ring).

Hexagon wrench

(Nominal size: 4)

Tightening torque:

0.6+/-0.05 N m

Hexagon wrench

(Nominal size: 4)

Applicable

model

Work

category Procedure Tool Criteria

AR20

AR20K

AR30

AR30K

AR40

AR40K

AR50

AR50K

AR60

AR60K

(13) Plug (with O-ring)

Regulator (AR20-D / AR30-D / AR40-D/ AR50-D/ AR60-D)

Regulator (AR20K-D / AR30K-D / AR40K-D/ AR50K-D/ AR60K-D)

(13) Plug (with O-ring)

10-8. Plug Assembly Replacement

-24-

AR20K

AR30K

AR40K

AR50K

AR60K

Phillips

screwdriver

Phillips

screwdriver

Remove the plug assembly.

Remove the 2 mounting screws and remove the plug

assembly.

Confirm that the O-ring is mounted onto the

component "A".

When the O-ring comes out or is left on the regulator,

mount the O-ring to the component "A" correctly.

Assemble the plug assembly.

Assemble the plug assembly to the product with the

mounting screws and tighten the screws referring to

the tightening torque specified in the right column.

3)

2)

1)

Tightening torque:

0.6+/-0.05 N m

Presence of the O-ring

Applicable

model

Work

category Procedure Tool Criteria

Disassembly

Assembly

O-ring

Product

(15) Plug assembly

Component "A"

Mounting screws (2 pcs.)

11. Disassembly Drawing 11-1. AR20-D/ AR30-D/ AR40-D/ AR50-D/ AR60-D

-25-

Cross recessed

round head screws

(4 pcs.)

Bonnet

Pressure regulating screw assembly

Pressure regulating spring

(11) Diaphragm assembly

Body

(10) Valve assembly

Valve spring

(12) Valve guide assembly

Cover

Cap

I N

OUT

(Protrusion on IN side)

Washer (only for 50 and 60 sizes)

11-2. Disassembly Drawing of the Pressure Gauge Port [Applicable model: without pressure gauge / with pressure gauge (round type)]

11-3. Disassembly Drawing of the Pressure Gauge Port [Applicable model: with square embedded type pressure gauge /

right angle square type pressure gauge / with digital pressure switch]

- When the pressure gauge or the digital pressure switch is mounted on the back of the product, swap all parts for the front and back.

- When swapping (4) Square embedded type pressure gauge and (9) Digital pressure switch,

tighten them with 0.85+/-0.05Nm. Tighten others with 0.60.05Nm.

-26-

Product (3) Pressure gauge (round type)

Mounting screws (2 pcs.)

Mounting screws (2 pcs.)

Product

Note) Refer to the operation manual included in the product with digital pressure switch.

O-ring

(5) Pressure gauge cover assembly

(14) Blanking plate assembly

Blanking plate

pressure switch

Right angle

adapter

(9) Digital pressure switch

(4) Square embedded type pressure gauge

O-ring Pressure gauge

Mounting screws (2 pcs.)

O-ring

O-ring

Mounting screws (2 pcs.)

O-ringMounting screws (2 pcs.)

Lock pin

Adapter

(5) Pressure gauge cover assembly

(7) Right angle square type pressure gauge

(with mounting accessories)

Lock pin

Adapter

(8) Right angle square type

pressure gauge assembly

(6) Right angle square type pressure gauge

(13) Plug (with O-ring)

(13) Plug (with O-ring)

Pressure gauge

11-4. Disassembly Drawing of the Preassure Gauge Port [Applicable model: with backflow function]

- When the pressure gauge or the digital pressure switch is mounted on the back of the product, swap all parts for the front and back.

- When swapping (4) Square embedded type pressure gauge and (9) Digital pressure switch,

tighten them with 0.85+/-0.05Nm. Tighten others with 0.60.05Nm.

-27-

O-ring

(2 pcs.)

Product

Check valve cover Note) Refer to the operation manual included in the product with digital pressure switch.

(16) Check valve assembly

Mounting screws (2 pcs.)

(13) Plugwith O-ring

Pressure gauge adapter

Mounting screws (2 pcs.)

O-ring

Pressure

gauge

(4) Square embedded type pressure gauge

O-ring

O-ring

(3) Pressure gauge (round type)

(15) Plug assembly

Mounting screws (2 pcs.)

Mounting screws (2 pcs.)

Mounting screws (2 pcs.)

O-ring

O-ring

Mounting screws (2 pcs.)

pressure switch

(9) Digital pressure switch Lock pin

Adapter

Lock pin

Adapter

Right angle

adapter

(5) Pressure gauge cover assembly

(8) Right angle square type

pressure gauge assembly

(6) Right angle square type pressure gauge

(7) Right angle square type pressure gauge

(with mounting accessories)

(5) Pressure gauge cover assembly

Check valve main assembly

Pressure gauge

(17) Check vlave plug assembly

12. Domensions

12-1. Standard (with round type pressure gauge)

Dimensions

Model

P2 J K J H J J

AR20-D 1/8 40 66.8 26.5 21 21 2 37.5 57.5 37.5 58.5 37.5 58.5

AR30-D 1/8 53 86.5 30.5 26.5 26.5 3.5 37.5 63 37.5 64 37.5 64

AR40-D 1/8 70 91.5 35.5 35.5 35.5 - 42.5 73 42.5 73 42.5 73

AR40-06-D 1/8 75 93 35.5 35.5 35.5 - 42.5 73 42.5 73 42.5 73

AR50-D 1/8 90 125 43 45 45 - 42.5 82.5 42.5 82.5 42.5 82.5

AR60-D 1/8 95 155 45 45 45 - 42.5 82.5 42.5 82.5 42.5 82.5

Q R U

AR20-D 30 34 43.9 5.4 15.4 55 2.3 24.7 28.5 14 6

AR30-D 41 40 46 6.5 8 53 2.3 31.3 38.5 19 7

AR40-D 50 54 54 8.5 10.5 70 2.3 35.5 42.5 21 7

AR40-06-D 50 54 55.5 8.5 10.5 70 2.3 37 42.5 21 7

AR50-D 70 75 66 11 22 113 3.2 - - - -

AR60-D 70 75 66 11 22 113 3.2 - - - -

-28-

3/4, 1 -

1 -

3/4 M421.5

Standard specifications Round type

pressure gauge

(Semi-standard: Z)

The dimension of B is the length when the regulator knob is unlocked.

Optional specifications

Round type

pressure gauge

Round type

pressure gauge

(with color zone)

Bracket mountModel

Optional specifications

Panel mount

1/8, 1/4

1/4, 3/8

1/4, 3/8, 1/2 M421.5

M381.5

M281

P1

Plate thickness

AR20/30-D: Max.3.5

AR40-D: Max.5

Panel mounting dimensions

(Pressure gauge port size)

(Port size)

12-2. Standard

Dimensions

Model

K J H J J

AR20-D 40 66.8 26.5 26 2 28 27 28 54.3 27.8 37.5

AR30-D 53 86.5 30.5 31.5 3.5 28 32.5 28 59.8 27.8 43

AR40-D 70 91.5 35.5 40.5 - 28 41.5 28 68.8 27.8 52

AR40-06-D 75 93 35.5 40.5 - 28 41.5 28 68.8 27.8 52

AR50-D 90 125 43 45 - 28 51 - - 27.8 61.5

AR60-D 95 155 45 50 - 28 51 - - 27.8 61.5

Q R U

AR20-D 30 34 43.9 5.4 15.4 55 2.3 24.7 28.5 14 6

AR30-D 41 40 46 6.5 8 53 2.3 31.3 38.5 19 7

AR40-D 50 54 54 8.5 10.5 70 2.3 35.5 42.5 21 7

AR40-06-D 50 54 55.5 8.5 10.5 70 2.3 37 42.5 21 7

AR50-D 70 75 66 11 22 113 3.2 - - - -

AR60-D 70 75 66 11 22 113 3.2 - - - -

-29-

(With square embedded type pressure gauge,

right angle square type pressure gauge or digital pressure switch)

3/4

square embedded

type pressure gauge

M421.5

M381.5

1/4, 3/8, 1/2

-

Standard specifications Digital

pressure switch

Optional specifications

1/8, 1/4

3/4, 1 -

P1

Right angle square

type pressure gauge

The dimension of B is the length when the regulator knob is unlocked.

M281

Model

Optional specifications

M421.5

Bracket mount Panel mount

1

1/4, 3/8

Plate thickness

AR20/AR30-D: Max.3.5

AR40-D: Max.5

Panel mounting dimensions

(Port size)

12-3. With backflow function (with round type pressure gauge, square embedded type pressure gauge, right angle square type pressure gauge or digital pressure switch)

Dimensions

Model

P2 J K J H J J J H J

AR20K-D 1/8 40 66.8 26.5 26 26 2 37.5 62.5 37.5 63.5 37.5 63.5 28 27 28 54.3

AR30K-D 1/8 53 86.5 30.5 31.5 31.5 3.5 37.5 68 37.5 69 37.5 69 28 32.5 28 59.8

AR40K-D 1/8 70 91.5 35.5 40.5 40.5 - 42.5 78 42.5 78 42.5 78 28 41.5 28 68.8

AR40K-06-D 1/8 75 93 35.5 40.5 40.5 - 42.5 78 42.5 78 42.5 78 28 41.5 28 68.8

AR50K-D 1/8 90 125 43 50 50 - 42.5 87.5 42.5 87.5 42.5 87.5 28 51 - -

AR60K-D 1/8 95 155 45 50 50 - 42.5 87.5 42.5 87.5 42.5 87.5 28 51 - -

J Q R U

AR20K-D 27.8 37.5 30 34 43.9 5.4 15.4 55 2.3 24.7 28.5 14 6

AR30K-D 27.8 43 41 40 46 6.5 8 53 2.3 31.3 38.5 19 7

AR40K-D 27.8 52 50 54 54 8.5 10.5 70 2.3 35.5 42.5 21 7

AR40K-06-D 27.8 52 50 54 55.5 8.5 10.5 70 2.3 37 42.5 21 7

AR50K-D 27.8 61.5 70 75 66 11 22 113 3.2 - - - -

AR60K-D 27.8 61.5 70 75 66 11 22 113 3.2 - - - -

1/8, 1/4

3/4

-

Round type

pressure gauge

M281

The dimension of B is the length when the regulator knob is unlocked.

-

M421.5

3/4, 1

Digital

pressure switch

Optional specifications

Bracket mount Panel mount

-30-

1/4, 3/8, 1/2 M421.5

Model

Round type

pressure gauge

(Semi-standard: Z)

M381.5

P1

1/4, 3/8

1

Optional specifications

square embedded

type pressure gauge

Standard specifications Right angle square

type pressure gauge

Round type

pressure gauge

(with color zone)

Panel thickness

AR20K/AR30K-D: Max.3.5

AR40K-D: Max.5

Panel mounting dimensions

(Port size)

(Pressure gauge port size)

P2

Revision history

40-06,50,60 size added, Corrected.

Dec. 2020.

Right angle square type pressure gauge

Added.

Apr. 2022.

4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN Tel: + 81 3 5207 8249 Fax: +81 3 5298 5362 URL https://www.smcworld.com Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer. 2019 SMC Corporatio

Manualsnet FAQs

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