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Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series (AR25-02-B-X430)

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On Sale Till 31/03/2025

SMC

SMC Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series.
[Features]
· Specifications with a backflow function feature an inbuilt mechanism for quickly exhausting the air-pressure at the outlet side.

(i)Caution

Refer to the catalog for details on product specifications.
Product images may be representative. Refer to the manufacturer's catalog for details.

Part Number

Configured Part Number is shown.

AR25-02-B-X430

Product Specifications
Part Numbers
Catalog

Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series Details

AR20-B/AR20K-B: product images

AR40-B/AR40K-B: product images

Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series Specifications

Model Number Notation

Model number example

-				Code	Contents	(1)
						Body size
						20	25	30	40	50	60
(2)	With backflow function			No symbol	Without backflow function	●	●	●	●	●	●
(2)	With backflow function			K ^{Note 1)}	With backflow function	●	●	●	●	●	●
(3)	Screw Type			No symbol	Rc	●	●	●	●	●	●
				N	NPT	●	●	●	●	●	●
				F	G	●	●	●	●	●	●
(4)	Piping connection port diameter			01	1/8	●	-	-	-	-	-
				02	1/4	●	●	●	●	-	-
				03	3/8	-	●	●	●	-	-
				04	1/2	-	-	-	●	-	-
				06	3/4	-	-	-	●	●	-
				10	1	-	-	-	-	●	●
(5)	^{Note 2)} Option	a	Mounting	No symbol	Without optional mounting parts	●	●	●	●	●	●
				B ^{Note 3)}	With Bracket	●	●	●	●	●	●
				H	With set nut (for panel mount)	●	●	●	●	-	-
		b	Pressure gauge ^{Note 4)}	No symbol	Without pressure gauge	●	●	●	●	●	●
				E	Square embedded-type pressure gauge (with limit indicator)	●	●	●	●	●	●
				G	Round-type pressure gauge (with limit indicator)	●	●	●	●	●	●
				M	M Round-type pressure gauge (with color zone)	●	●	●	●	●	●
			Digital ^{Note 5)} Pressure switch	E1	Output: NPN output / Lead wire electrical entry: wiring bottom entry	●	●	●	●	●	●
				E2	Output: NPN output / Lead wire electrical entry: wiring top entry	●	●	●	●	●	●
				E3	Output: PNP output / Lead wire electrical entry: wiring bottom entry	●	●	●	●	●	●
				E4	Output: PNP output / Lead wire electrical entry: wiring top entry	●	●	●	●	●	●
(6)	Semi-standard	c	Set pressure ^{Note 6)}	No symbol	0.05 to 0.85‑MPa setting	●	●	●	●	●	●
		c	Set pressure ^{Note 6)}	1	0.02 to 0.2‑MPa setting	●	●	●	●	●	●
		d	Exhaust mechanism	No symbol	Relieving type	●	●	●	●	●	●
		d	Exhaust mechanism	N	Non-relieving type	●	●	●	●	●	●
		e	Flow direction	No symbol	Flow direction: left → right	●	●	●	●	●	●
		e	Flow direction	R	Flow direction: right → left	●	●	●	●	●	●
		f	Handle direction	No symbol	Handle downward	●	●	●	●	●	●
		f	Handle direction	Y	Handle upward	●	●	●	●	●	●
		g	Pressure unit	No symbol	Nameplate and pressure gauge units: MPa	●	●	●	●	●	●
				Z ^{Note 7)}	Nameplate and pressure gauge units: psi	O ^{Note 9)}	O ^{Note 9)}	O ^{Note 9)}	O ^{Note 9)}	O ^{Note 9)}	O ^{Note 9)}
				ZA ^{Note 8)}	Digital pressure switch: with unit selection function	△ ^{Note 10)}	△ ^{Note 10)}	△ ^{Note 10)}	△ ^{Note 10)}	△ ^{Note 10)}	△ ^{Note 10)}

Note 1) Set the inlet pressure to at least 0.05‑MPa higher than the set pressure.
Note 2) Options B, G, H, M are not assembled and are supplied loose at the time of shipment.
Note 3) Set nuts are included with the bracket. (applicable to the AR20(K)-B to AR40(K)-B). 2 mounting screws included for the AR50(K)-B/AR60(K)-B.
Note 4) When the pressure gauge is attached, a 1.0‑MPa specification will be fitted for standard (0.8‑MPa setting) type; 0.4 MPa for the 0.2‑MPa type.
Note 5) When choosing with H (panel mount), the installation space for lead wires will not be secured. In this case, select "wiring top entry" for the electrical entry. (Select "wiring bottom entry" when the semi-standard Y is chosen simultaneously.)
Note 6) Pressure can be set higher than the specification pressure in some cases, but use with the pressure within the specified range.
Note 7) Thread type: NPT is applicable. Under new Japanese measurement laws, this product is only available for sale outside of Japan (SI units are used in Japan). Round-type pressure gauge (with color zone): cannot be used in combination with M. The digital pressure switch, which has the unit selection function, has a default setting of psi.
Note 8) Options: E1, E2, E3, E4. Under new Japanese measurement laws, this product is only available for sale outside of Japan (SI units are used in Japan).
Note 9) ○ is for thread type NPT only.
Note 10) △: Combination available for options E1, E2, E3, E4.

Standard specification

Model	AR20-B	AR25-B	AR30-B	AR40-B	AR40-06-B	AR50-B	AR60-B
Piping connection port diameter	1/8, 1/4	1/4, 3/8	1/4, 3/8	1/4, 3/8, 1/2	3/4	3/4, 1	1
Pressure gauge connection port size ^{Note 1)}	1/8
Applicable fluids	Air
Ambient temperature and working fluid temperature ^{Note 2)}	-5 to 60°C (no freezing)
Proof pressure	1.5 MPa
Maximum operating pressure	1.0 MPa
Set pressure range	0.05 to 0.85 MPa
Structure	Relieving type
Weight (kg)	0.16	0.21	0.29	0.44	0.47	1.17	1.22

Note 1) For the specification with the square embedded type pressure gauge and the specification with the digital pressure switch, there are no pressure gauge connection screws.
Note 2) For the type with a digital pressure switch: -5 to +50°C.

Options / Part No.

Option			Model
Option			AR20(K)-B	AR25(K)-B	AR30(K)-B	AR40(K)-B	AR40(K)-06-B	AR50(K)-B	AR60(K)-B
Bracket assembly ^{Note 1)}			AR23P-270AS	AR28P-270AS	AR33P-270AS	AR43P-270AS		AR52P-270AS
Set nut			AR23P-260S	AR28P-260S	AR33P-260S	AR43P-260S		-^{Note 2)}
Pressure gauge	Round-type ^{Note 3)}	Standard	G36-10-□01			G46-10-□01
	Round-type ^{Note 3)}	0.02 to 0.2‑MPa setting	G36-4-□01			G46-4-□01
	Round-type ^{Note 3)} (with color zone)	Standard	G36-10-□01-L			G46-10-□01-L
	Round-type ^{Note 3)} (with color zone)	0.02 to 0.2‑MPa setting	G36-4-□01-L			G46-4-□01-L
	Square embedded type ^{Note 4)}	Standard	GC3-10AS [GC3P-010AS (pressure gauge cover only)]
	Square embedded type ^{Note 4)}	0.02 to 0.2‑MPa setting	GC3-4AS [GC3P-010AS (pressure gauge cover only)]
Digital pressure ^{Note 5)} Switch		NPN output / Wiring bottom entry	ISE35-N-25-MLA [ISE35-N-25-M (main switch unit only)]
		NPN output / Wiring top entry	ISE35-R-25-MLA [ISE35-R-25-M (main switch unit only)]
		PNP output / Wiring bottom entry	ISE35-N-65-MLA [ISE35-N-65-M (main switch unit only)]
		PNP output / Wiring top entry	ISE35-R-65-MLA [ISE35-R-65-M (main switch unit only)]

Note 1) Assembly of a bracket and set nuts. The AR50(K)-B, AR60(K)-B have mounting screws (2 pcs.) included.
Note 2) Consult separately with the manufacturer regarding the set nuts for the AR50(K)-B, AR60(K)-B.
Note 3) The □ in the part numbers for round-type pressure gauges indicates the connection thread type. Insert no symbol for Rc, and use "N" for NPT. Contact the manufacturer regarding the supply of psi unit specification pressure gauges.
Note 4) Including O-ring (1 pc.) and mounting screws (2 pcs.). [ ]: Pressure gauge cover only.
Note 5) In addition to the pressure switch, it also includes a lead wire with connector (2 m), adapter, lock pin, O-ring (1 pc.) and mounting screws (2 pcs.). [ ]: Switch unit only.

Structural Drawings

AR10-A structural drawing

AR20(K)-B / AR25(K)-B: structural drawings

AR30(K)-B / AR40(K)-B: structural drawings

AR50(K)-B / AR60(K)-B: structural drawings

AR20K-B to AR60K-B (Regulator With Backflow Function): structural drawings

Component Parts

Number	Part name	Materials	Model	Additional notes
1	Body	Zinc die-cast	AR10-A	Urban white
1	Body	Die-cast aluminum	AR20(K)-B to AR60(K)-B	Urban white
2	Bonnet	Polyacetal	AR10-A
		Polyacetal	AR20(K)-B to AR40(K)-B
		Die-cast aluminum	AR50(K)-B/AR60(K)-B

Replacement Parts [AR10-A]

Number	Part name	Materials	Part number
3	Valve	HNBR	AR10P-090S
4	Piston assembly	Polyacetal	AR10P-150AS
5	Valve guide assembly	Polyacetal	131329

Replacement Parts [AR20(K)-B to AR60(K)-B]

Number	Part name	Materials	Part number
Number	Part name	Materials	AR20(K)-B	AR25(K)-B	AR30(K)-B	AR40(K)-B	AR40(K)-06-B	AR50(K)-B	AR60(K)-B
3	Valve	Brass, HNBR	AR20P-410S	AR25P-410S	AR30P-410S	AR40P-410S		AR50P-410S	AR60P-410S
4	Diaphragm assembly	Weatherable NBR	AR20P-150AS	AR25P-150AS	AR30P-150AS	AR40P-150AS		AR50P-150AS
5	Valve guide assembly	Polyacetal	AR20P-050AS	AR25P-050AS	AR30P-050AS	AR40P-050AS		AR50P-050AS	AR60P-050AS
6	Check valve assembly ^Note)	-	AR23KP-020AS

Note) Check valve assembly is applicable only for specifications with the backflow function (AR20K-B to AR60K-B). Assembly consisting of a check valve cover, check valve body and mounting screws (2 pcs.).

Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series Dimensions

AR10-A

(Unit: mm)

AR10-A dimensional drawing

AR20(K)-B to AR40(K)-06-B

(Unit: mm)

AR20(K)-B to AR40(K)-06-B: dimensional drawing

AR50(K)-B/AR60(K)-B

(Unit: mm)

AR50(K)-B/AR60(K)-B: dimensional drawing

Option

(Unit: mm)

Square embedded type pressure gauge

Digital pressure switch

Round-type pressure gauge / Round-type pressure gauge (with color zone)

Model	Standard specification
	Standard specification
	P1	P2	A	B ^{Note 1)}	C	D	F	J	K
AR10-A	M5 × 0.8	1/16	25	47.4	11	12.5	M18 × 1	12.5	-
AR20(K)-B	1/8, 1/4	1/8	40	67.4	26.5	28.5	M28 × 1	28.5	2 ^{Note 2)}
AR25(K)-B	1/4, 3/8	1/8	53	71.9	28	27.5	M32 × 1.5	27.5	0
AR30(K)-B	1/4, 3/8	1/8	53	85.6	30.7	29.4	M38 × 1.5	29.4	3.5
AR40(K)-B	1/4, 3/8, 1/2	1/8	70	91.7	35.8	33.8	M42 × 1.5	33.8	3.5
AR40(K)-06-B	3/4	1/8	75	93.2	35.8	33.8	M42 × 1.5	33.8	3
AR50(K)-B	3/4, 1	1/8	90	125.2	43	43.3	M62 × 1.5	43.3	3.2
AR60(K)-B	1	1/8	95	129.6	46	43.3	M62 × 1.5	43.3	3.2

Model	Option specification
	Square type pressure gauge		Digital pressure switch		Round-type pressure gauge		Round-type pressure gauge (with color zone)
	H	J	H	J	H	J	H	J
AR10-A	-	-	-	-	ø26 (diameter 26 mm)	26	-	-
AR20(K)-B	□28	29.5	□27.8	40	ø37.5 (diameter 37.5 mm)	65	ø37.5 (diameter 37.5 mm)	66
AR25(K)-B	□28	28.5	□27.8	39	ø37.5 (diameter 37.5 mm)	64	ø37.5 (diameter 37.5 mm)	65
AR30(K)-B	□28	30.4	□27.8	40.9	ø37.5 (diameter 37.5 mm)	65.9	ø37.5 (diameter 37.5 mm)	66.9
AR40(K)-B	□28	34.8	□27.8	45.3	ø42.5 (diameter 42.5 mm)	71.3	ø42.5 (diameter 42.5 mm)	71.3
AR40(K)-06-B	□28	34.8	□27.8	45.3	ø42.5 (diameter 42.5 mm)	71.3	ø42.5 (diameter 42.5 mm)	71.3
AR50(K)-B	□28	44.3	□27.8	54.8	ø42.5 (diameter 42.5 mm)	80.8	ø42.5 (diameter 42.5 mm)	80.8
AR60(K)-B	□28	44.3	□27.8	54.8	ø42.5 (diameter 42.5 mm)	80.8	ø42.5 (diameter 42.5 mm)	80.8

Model	Option specification
	Bracket mounting dimensions							Panel mount
	M	N	Q	R	S	T	U	V	W	Y	Z
AR10-A	25	28	30	4.5	6.5	40	2	18	18.5	-	-
AR20(K)-B	30	34	43.9	5.4	15.4	55	2.3	24.7	28.5	14	6
AR25(K)-B	30	34	43.9	5.4	15.4	55	2.3	25.7	32.5	16	6
AR30(K)-B	41	40	45.8	6.5	8	53	2.3	31.1	38.5	19	7
AR40(K)-B	50	54	54	8.5	10.5	70	2.3	35.5	42.5	21	7
AR40(K)-06-B	50	54	55.5	8.5	10.5	70	2.3	37	42.5	21	7
AR50(K)-B	70	66	65.8	11	13	90	3.2	-	-	-	-
AR60(K)-B	70	66	65.8	11	13	90	3.2	-	-	-	-

Note 1) The dimension B is the length when the filter regulator knob (handle) is unlocked.
Note 2) For the AR20(K)-B only, the position of the pressure gauge is above the center of the piping.

: 30; 45; 60

Part Number
AR25-02-B-X430

Part Number	Standard Unit Price	Minimum order quantity	Volume Discount	Days to Ship	Exhaust Mechanism	Adverse Current Function	Supply Side, Connection Type	Supply Side, Connection Dia.	Flow Direction	Control Side, Connection Type	Control Side, Connection Dia.	Pressure Gauge	Size of Body	Accessory	Set Pressure	Pressure Unit	Custom-made Specifications	Handle Direction / Position
	SGD 138.95	1 Piece(s)		Quote	[Provided] Relief	No	Rc	1/4	[(Right)] Left→Right	Rc	1/4	[Not Provided] No Pressure Gauge	25	None	0.05 to 0.85 MPa	Product name plate and pressure gauge unit: MPa	For Low-Temperature Environment	Handle downward

Basic Information

Regulator, Pressure Boosting Valve	Regulator	Regulator Type	Standard	Applicable Fluid	Air
Shape	Standard	Operating Environment	Standard

Please check the type/dimensions/specifications of the part AR25-02-B-X430 in the Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series series.

Configure

1 Part Numbers

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Configure Remaining Specifications

Completed

Specification/Dimensions

type
- AR20
- AR20K
- AR25
- AR25K
- AR30
- AR30K
- AR40
- AR40K
- AR50
- AR50K
- AR60
- AR60K
Clear
Exhaust Mechanism
- Not Provided
  - Non-relief
- Provided
  - Relief
Clear
Adverse Current Function
- No
- Provided
  - Presence
Clear
Supply Side, Connection Type
- Rc
- G
- NPT
  - NPT
Clear
Supply Side, Connection Dia.
1/8

1/4

3/8

1/2

3/4

1
Clear
Flow Direction
- (Right)
  - Left→Right
- (Left)
  - Right→Left
Clear
Control Side, Connection Type
- Rc
- G
- NPT
  - NPT
Clear
Control Side, Connection Dia.
1/8

1/4

3/8

1/2

3/4

1
Clear
Pressure Gauge
- Not Provided
  - No Pressure Gauge
- With Pressure Gauge
  - Round-shaped pressure gauge (with color zone)
  - Round-shaped pressure gauge (with limit indicator)
  - Square type inserted pressure gauge (with limit indicator)
- With Pressure Switch
  - Digital pressure switch
  - Digital pressure switch
  - Digital pressure switch
  - Digital pressure switch
Clear
Size of Body
20

25

30

40

50

60
Clear
Accessory
- None
- With Bracket
- With set nut (for panel mount)
Clear
Set Pressure
- 0.02 to 0.2 MPa
- 0.05 to 0.4 MPa
- 0.05 to 0.85 MPa
- 0.1 to 1.7 MPa
Clear
Pressure Unit
- Digital pressure switch: with unit switching
- Digital pressure switch:having unit switching function
- Nameplate and pressure gauge units: MPa
- Nameplate and pressure gauge units: psi
- Product name plate and pressure gauge unit: MPa
- Product name plate and pressure gauge unit: psi
Clear
Custom-made Specifications
- 0.4 MPa setting
- External material metal
- For Low-Temperature Environment
- NPN output with digital pressure switch
- None
- Suitable for high pressure
- Used under high temperature
Clear
Handle Direction / Position
- Handle downward
- Handle upward
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

Same day

31 Day(s) or Less

32 Day(s) or Less

41 Day(s) or Less

67 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Similar Part Numbers

Part Number
AR20-01-1RY-B
AR20-01-1Y-B
AR20-01-B
AR25-02-B-X470
AR25-02-N-B
AR25-02-N-B-X440

Standard Unit Price	Minimum order quantity	Days to Ship	Exhaust Mechanism	Adverse Current Function	Supply Side, Connection Type	Supply Side, Connection Dia.	Flow Direction	Control Side, Connection Type	Control Side, Connection Dia.	Pressure Gauge	Size of Body	Accessory	Set Pressure	Pressure Unit	Custom-made Specifications	Handle Direction / Position
-	1 Piece(s)	Quote	[Provided] Relief	No	Rc	1/8	[(Left)] Right→Left	Rc	1/8	[Not Provided] No Pressure Gauge	20	None	0.02 to 0.2 MPa	Product name plate and pressure gauge unit: MPa	None	Handle upward
-	1 Piece(s)	Quote	[Provided] Relief	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[Not Provided] No Pressure Gauge	20	None	0.02 to 0.2 MPa	Nameplate and pressure gauge units: MPa	-	Handle upward
SGD 47.60	1 Piece(s)	32 Day(s)	[Provided] Relief	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[Not Provided] No Pressure Gauge	20	None	0.05 to 0.85 MPa	Nameplate and pressure gauge units: MPa	-	Handle downward
-	1 Piece(s)	Quote	[Provided] Relief	No	Rc	1/4	[(Right)] Left→Right	Rc	1/4	[Not Provided] No Pressure Gauge	25	None	0.05 to 0.85 MPa	Product name plate and pressure gauge unit: MPa	External material metal	Handle downward
-	1 Piece(s)	Quote	[Not Provided] Non-relief	No	Rc	1/4	[(Right)] Left→Right	Rc	1/4	[Not Provided] No Pressure Gauge	25	None	0.05 to 0.85 MPa	Nameplate and pressure gauge units: MPa	-	Handle downward
-	1 Piece(s)	Quote	[Not Provided] Non-relief	No	Rc	1/4	[(Right)] Left→Right	Rc	1/4	[Not Provided] No Pressure Gauge	25	None	0.05 to 0.85 MPa	Product name plate and pressure gauge unit: MPa	Used under high temperature	Handle downward

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Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series (AR25-02-B-X430)

(i)Caution

Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series Details

Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series Specifications

Model Number Notation

Standard specification

Options / Part No.

Structural Drawings

Component Parts

Replacement Parts [AR10-A]

Replacement Parts [AR20(K)-B to AR60(K)-B]

Regulator (With Backflow Function) AR20(K)-B To AR60(K)-B Series Dimensions

AR10-A

AR20(K)-B to AR40(K)-06-B

AR50(K)-B/AR60(K)-B

Option

Basic Information

Configure

Specification/Dimensions

type

Exhaust Mechanism

Adverse Current Function

Supply Side, Connection Type

Supply Side, Connection Dia.

Flow Direction

Control Side, Connection Type

Control Side, Connection Dia.

Pressure Gauge

Size of Body

Accessory

Set Pressure

Pressure Unit

Custom-made Specifications

Handle Direction / Position

CAD

Days to Ship

Specify Alterations

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