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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 the dimensional drawings (P26-28) 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. 

 

 

 

 

 

 

 

 

 

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Summary of Contents for AR20 Series

Page 1: ...2 E3 E4 G H M 1 N R Y Z ZA D AR30 K F N 02 F N 03 B E E1 E2 E3 E4 G H M 1 N R Y Z ZA D AR40 K F N 02 F N 04 B E E1 E2 E3 E4 G H M 1 N R Y Z ZA D AR40 K F N 06 B E E1 E2 E3 E4 G H M 1 N R Y Z ZA D AR50...

Page 2: ...oting 14 15 10 How to Replace the Components 16 22 10 1 Diaphragm Assembly Replacement 16 10 2 Valve Guide Assembly and Valve Assembly Replacement 17 10 3 Square Embedded Type Pressure Gauge Replaceme...

Page 3: ...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 assembl...

Page 4: ...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...

Page 5: ...tion 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...

Page 6: ...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 remo...

Page 7: ...e 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 so...

Page 8: ...d 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 2 5 to 50o C for the products with the digital pr...

Page 9: ...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 direct...

Page 10: ...mounting G36 10 01 L ZA Unit selection function Unit selection function Initial setting psi 4 3 NPT With O ring 1 pc and mounting screws 2 pcs Part number for 0 2 MPa GC3 4AS D Rc NPT type GC3 P4AS D...

Page 11: ...AS AR54P 060AS AR64P 060AS Relief AR24P 150AS AR34P 150AS N Non relief AR24P 150AS N AR34P 150AS N 9 Valve guide assembly AR24P 050AS AR34P 050AS Rc G NPT 11 Blanking plate assembly Rc NPT G 13 Check...

Page 12: ...y 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 bra...

Page 13: ...uge 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 when controlling the tightening torque No plug is mounted onto the p...

Page 14: ...ockwise 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...

Page 15: ...ve assembly P17 2 Rubber seat of the valve is damaged Replace the valve assembly P17 3 Valve spring is damaged Replace the valve spring P17 4 The valve is fixed in an opened position Clean the valve s...

Page 16: ...gm is damaged Replace the diaphragm assembly P16 1 Product without backflow function is used Check the product number if backflow function is equipped P8 2 Foreign materials caught in the sliding part...

Page 17: ...spring and diaphragm assembly in that order 4 Assemble the diaphragm assembly pressure regulating spring and then pressure regulating screw assembly Direction of diaphragm assembly and pressure regul...

Page 18: ...with a precision screwdriver Precision screwdriver 4 Remove the valve spring 5 Remove the valve assembly Assembly 6 After replacing the removed components with new components place them into the regul...

Page 19: ...e to the regulator with the mounting screws and tighten the screws referring to the tightening torque specified in the right column Phillips screwdriver Tightening torque 0 85 0 05 N m 5 Mount the pre...

Page 20: ...te correctly Presence of the O ring 3 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 t...

Page 21: ...mes out or is left on the regulator mount the O ring to the check valve assembly correctly Presence of the O ring 4 Mount the check valve cover Mount the check valve cover to the product with the moun...

Page 22: ...sembly 2 Assemble the plug assembly Hexagon wrench Nominal size 4 Tightening torque 0 6 0 05 N m Note Applicable to the product without pressure gauge 21 Procedure AR20 AR20K AR30 AR30K AR40 AR40K AR5...

Page 23: ...ng comes out or is left on the regulator mount the O ring to the plug assembly correctly Presence of the O ring 3 Assemble the plug assembly Assemble the plug assembly to the product with the mounting...

Page 24: ...3 Cross recessed round head screws 4 pcs Bonnet Pressure regulating screw assembly Pressure regulating spring 8 Diaphragm assembly Body 7 Valve assembly Valve spring 9 Valve guide assembly Cover Cap I...

Page 25: ...uct swap all parts for the front and back When swapping 4 Square embedded type pressure gauge and 6 Digital pressure switch tighten them with 0 85 0 05N m Tighten others with 0 6 0 05N m Mounting scre...

Page 26: ...5N m Tighten others with 0 6 0 05N m Square embedded type pressure gauge O ring 5 Pressure gauge cover O ring 2 pcs Check valve assembly Product Check valve cover 3 Pressure gauge round type Pressure...

Page 27: ...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 26 1 8 1...

Page 28: ...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 27 Optional specifications Standard specificati...

Page 29: ...D 41 40 46 6 5 8 53 2 3 31 3 38 5 19 7 AR40K D 50 54 54 8 5 10 5 70 2 3 35 5 42 5 21 7 AR40K 06 D 50 54 55 5 8 5 10 5 70 2 3 37 42 5 21 7 AR50K D 70 75 66 11 22 113 3 2 AR60K D 70 75 66 11 22 113 3 2...

Page 30: ...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 par...

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