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Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series (ARP20-01EH-3)

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SMC

Direct-Operated Precision Regulator, Modular Type (With Backflow Function) with sensitivity within 0.2% F.S.
[Features]
· Repeatability: Within ±1% F.S. (or within ±3 kPa).
· Energy saving and air consumption reduced by 80%.
· Type with the backflow function (ARP20K/30K/40K) can be installed between solenoid valves and cylinders.
· Specifications with a backflow function feature an inbuilt mechanism for quickly and reliable 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.

ARP20-01EH-3

Product Specifications
Part Numbers
Catalog

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series Details

ARP20/ARP20K: product images

ARP30/ARP30K: product images

ARP40/ARP40K: product images

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series Specification

Model Number Notation

Model number example

-				Code	Contents	(1)
						Body size
						20	30	40
(2)	With backflow function			No symbol	Without backflow function	●	●	●
(2)	With backflow function			K	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	-	-	●
(5)	Note 1) Options	a	Mounting	No symbol	Without optional mounting parts	●	●	●
				B ^{Note 2)}	With Bracket	●	●	●
				H	With set nut (for panel mount)	●	●	●
		b	Pressure gauge	No symbol	Without pressure gauge	●	●	●
				E	Square embedded-type pressure gauge (with limit indicator)	●	●	●
				G	Round-type pressure gauge (with limit indicator)	●	●	●
			Digital pressure switch	E1^{Note 3)}	Output: NPN output / Lead wire electrical entry: wiring bottom entry	●	●	●
				E2^{Note 3)}	Output: NPN output / Lead wire electrical entry: wiring top entry	●	●	●
				E3^{Note 3)}	Output: PNP output / Lead wire electrical entry: wiring bottom entry	●	●	●
				E4^{Note 3)}	Output: PNP output / Lead wire electrical entry: wiring top entry	●	●	●
(6)	Semi-standard	c	Set pressure	No symbol	0.005 to 0.4-MPa setting	●	●	●
				1 ^{Note 4)}	0.005 to 0.2‑MPa setting	●	●	●
				3 ^{Note 4)}	0.008 to 0.6-MPa setting	●	●	●
		d	Flow direction	No symbol	Flow direction: left → right	●	●	●
		d	Flow direction	R	Flow direction: right → left	●	●	●
		e	Handle direction	No symbol	Handle downward	●	●	●
		e	Handle direction	Y	Handle upward	●	●	●
		f	Pressure unit	No symbol	Nameplate and pressure gauge units: MPa	●	●	●
				Z ^{Note 5)}	Nameplate and pressure gauge units: psi	○ ^{Note 7)}	○ ^{Note 7)}	○ ^{Note 7)}
				ZA ^{Note 6)}	Digital pressure switch: with unit selection function	△ ^{Note 8)}	△ ^{Note 8)}	△ ^{Note 8)}

*Note 1) Options B, G and H are not assembled and are supplied loose at the time of shipment.
*Note 2) Set nuts are included with the bracket.
*Note 3) 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 4) The pressure regulator spring is the only difference from the standard specification. Does not restrict setting to a pressure of 0.2 MPa / 0.6 MPa or higher. Moreover, if a pressure gauge is attached, a 0.2‑MPa-use pressure gauge for 0.2‑MPa settings will be fitted or a 0.7‑MPa‑use pressure gauge for 0.6 MPa settings. For all times when a digital pressure switch is attached, the pressure display is fixed to 1.0 MPa.
*Note 5) 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). The digital pressure switch, which has the unit selection function, has a default setting of psi.
*Note 6) 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 7) ○ is for thread type NPT only.
*Note 8) △: Combination available for options E1, E2, E3, E4.

Specifications

Model			ARP20(K)	ARP30(K)	ARP40(K)
Connection port size			1/8, 1/4	1/4, 3/8	1/4, 3/8, 1/2
Applicable fluids			Air
Proof pressure			1.2 MPa
Maximum operating pressure			0.7 MPa
Set pressure range ^{Note 1)}	For 0.4‑MPa setting	Example: ARP30-02BG	0.005 to 0.4 MPa
	For 0.2‑MPa setting	Example) ARP30-02BG-1	0.005 to 0.2 MPa
	For 0.6‑MPa setting	Example) ARP30-02BG-3	0.008 to 0.6 MPa
Sensitivity			Within 0.2% F.S.
Repeatability ^{Note 2)}			Within ±1% F.S. (or ±3 kPa)
Air consumption amount	For 0.4‑MPa setting	Example: ARP30-02BG	1 L/min (ANR) or less (at P2 = 0.4 MPa)
	For 0.2‑MPa setting	Example) ARP30-02BG-1	0.6 L/min (ANR) or less (at P2 = 0.2 MPa)
	For 0.6‑MPa setting	Example) ARP30-02BG-3	1.4 L/min (ANR) or less (at P2 = 0.6 MPa)
Pressure connection port size ^{Note 3)}			1/8	1/8	1/4
Ambient temperature and working fluid temperature	-		-5 to 60°C (no freezing)
Ambient temperature and working fluid temperature	With Digital Pressure Switch	Example) ARP30-02BE1	-5 to 50°C (no freezing)
Structure			Bleed type
Weight (kg) ^{Note 4)}			0.2	0.3	0.5

*Note 1) When a product with the backflow function (ARP20K to 40K) is chosen, set the inlet pressure to at least 0.05‑MPa higher than the set pressure.
*Note 2) For the type set to 0.2 MPa only, repeatability will be within ±3 kPa.
*Note 3) Connection port threading is not provided for products with square embedded pressure gauges.
*Note 4) The weight shown is for the product without any options.

Optional parts

Model			ARP20(K)	ARP30(K)	ARP40(K)
Bracket assembly ^{Note 1)}			ARP20P-270AS	ARP30P-270AS	ARP40P-270AS
Set nut			AR23P-260S	AR33P-260S	AR43P-260S
Pressure gauge	0.4 MPa	Round-type ^{Note 2)}	G36-4-□01		G46-4-□02
	0.4 MPa	Square embedded type ^{Note 3)}	GC3-4AS [GC3P-010AS (pressure gauge cover only)]
	0.2 MPa	Round-type ^{Note 2)}	G36-2-□01		G46-2-□02
	0.2 MPa	Square embedded type ^{Note 3)}	GC3-2AS [GC3P-010AS (pressure gauge cover only)]
	0.7 MPa	Round-type ^{Note 2)}	G36-7-□01		G46-7-□02
	0.7 MPa	Square embedded type ^{Note 3)}	GC3-7AS [GC3P-010AS (pressure gauge cover only)]
	Digital type ^{Note 4)}	NPN output / Wiring bottom entry	ISE35-N-25-MLA [ISE35-N-25-M (main switch unit only)]
		NPN output / Wiring bottom 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 bottom entry	ISE35-R-65-MLA [ISE35-R-65-M (main switch unit only)]

*Note 1) Assembly of a bracket and set nuts.
*Note 2) The □ in the part numbers for round-type pressure gauges indicates the connection thread type. Insert no symbol for Rc thread, and use "N" for NPT thread. The G thread is not available. As such, select the R thread type (Nil) instead. Contact the manufacturer separately regarding NPT connection thread types and for psi unit specification pressure gauges.
*Note 3) Including O-ring (1 pc.) and mounting screws (2 pcs.). [ ]: Pressure gauge cover only.
*Note 4) 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

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series: structural drawings

Component Parts

Number	Part name	Materials	Additional notes
1	Body	Die-cast aluminum	External color: urban white
2	Bonnet	Polyacetal	External color: urban white

Replacement Parts

Number	Part name	Materials	Part number
Number	Part name	Materials	ARP20(K)	ARP30(K)	ARP40(K)
3	Valve assembly	Brass, HNBR, NBR	ARP20P-330AS	ARP30P-330AS	ARP40P-330AS
4	Valve guide assembly	Polyacetal, NBR	ARP20P-050AS	ARP30P-050AS	ARP40P-050AS
5	Diaphragm assembly	HNBR, SUS, brass	ARP20P-151AS	ARP30P-151AS	ARP40P-151AS
6 ^Note)	Check valve assembly	-	AR20KP-020AS

*Note) The check valve assembly is a replacement part for specifications with the backflow function (ARP20K to 40K). Assembly comprising check valve body assembly, check valve cover and screws (2 pcs.).

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series Dimensions

(Unit: mm)

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series: dimensional drawing

Pressure Gauge Options

Option	Square embedded type pressure gauge	Digital pressure switch (Electrical entry: wiring bottom entry)	Digital pressure switch (Electrical entry: wiring top entry)	Round-type pressure gauge

Model	Standard specification
Model	P1	P2	A	B ^{Note 1)}	C	D	F	J	K
ARP20(K)	1/8, 1/4	1/8	40	98	27	28.5	M28 × 1	28.5	2 ^{Note 2)}
ARP30(K)	1/4, 3/8	1/8	53	117	29	29.5	M38 × 1.5	29.5	2.5
ARP40(K)	1/4, 3/8, 1/2	1/4	70	148	41	34	M42 × 1.5	34	1

Model	Option specification
	Square type pressure gauge		Digital pressure gauge		Round-type pressure gauge		Bracket mounting dimensions							Panel mount
	H	J	H	J	H	J	M	N	Q	R	S	T	U	V	W	Y	Z
ARP20(K)	□28	29.5	□27.8	40	ø37.5 (diameter 37.5 mm)	66	30	34	47	5.4	15.4	55	2.3	28	28.5	14	6
ARP30(K)	□28	30.5	□27.8	41	ø37.5 (diameter 37.5 mm)	67	41	40	44	6.5	8	53	2.3	31	38.5	19	7
ARP40(K)	□28	35	□27.8	45	ø42.5 (diameter 42.5 mm)	74	50	54	54	8.5	10.5	70	2.3	35.5	42.5	21	7

*Note 1) The dimension B is the length when the filter regulator knob (handle) is unlocked.
*Note 2) For the ARP20(K) only, the position of the pressure gauge is above the center of the piping.

: 30; 45; 60

Part Number
ARP20-01EH-3

Part Number	Standard Unit Price	Minimum order quantity	Volume Discount	Days to Ship	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	Handle Direction / Position
	-	1 Piece(s)		Quote	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[With Pressure Gauge] Square type inserted pressure gauge (with limit indicator)	20	With set nut (for panel mount)	0.008 to 0.6 MPa	Nameplate and pressure gauge units: MPa	Handle downward

Basic Information

Regulator, Pressure Boosting Valve	Regulator	Regulator Type	Precision Control	Applicable Fluid	Air
Shape	Standard	Operating Environment	Standard	Exhaust Mechanism	Bleed

Please check the type/dimensions/specifications of the part ARP20-01EH-3 in the Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series series.

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Specification/Dimensions

type
- ARP20
- ARP20K
- ARP30
- ARP30K
- ARP40
- ARP40K
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
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
Clear
Pressure Gauge
- Not Provided
  - No Pressure Gauge
- With Pressure Gauge
  - 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

30

40
Clear
Accessory
- None
- With Bracket
- With set nut (for panel mount)
Clear
Set Pressure
- 0.005 to 0.2 MPa
- 0.005 to 0.4 MPa
- 0.008 to 0.6 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
Handle Direction / Position
- Handle downward
- Handle upward
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

31 Day(s) or Less

32 Day(s) or Less

41 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
ARP20-01-1Y
ARP20-01-3
ARP20-01-3Y
ARP20-01EH-3Y
ARP20-01EH-RY
ARP20-01EH-Y

Standard Unit Price	Minimum order quantity	Days to Ship	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	Handle Direction / Position
-	1 Piece(s)	Quote	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[Not Provided] No Pressure Gauge	20	None	0.005 to 0.2 MPa	Nameplate and pressure gauge units: MPa	Handle upward
SGD 111.65	1 Piece(s)	32 Day(s)	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[Not Provided] No Pressure Gauge	20	None	0.008 to 0.6 MPa	Nameplate and pressure gauge units: MPa	Handle downward
-	1 Piece(s)	Quote	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[Not Provided] No Pressure Gauge	20	None	0.008 to 0.6 MPa	Nameplate and pressure gauge units: MPa	Handle upward
-	1 Piece(s)	Quote	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[With Pressure Gauge] Square type inserted pressure gauge (with limit indicator)	20	With set nut (for panel mount)	0.008 to 0.6 MPa	Nameplate and pressure gauge units: MPa	Handle upward
-	1 Piece(s)	Quote	No	Rc	1/8	[(Left)] Right→Left	Rc	1/8	[With Pressure Gauge] Square type inserted pressure gauge (with limit indicator)	20	With set nut (for panel mount)	0.005 to 0.4 MPa	Nameplate and pressure gauge units: MPa	Handle upward
-	1 Piece(s)	Quote	No	Rc	1/8	[(Right)] Left→Right	Rc	1/8	[With Pressure Gauge] Square type inserted pressure gauge (with limit indicator)	20	With set nut (for panel mount)	0.005 to 0.4 MPa	Nameplate and pressure gauge units: MPa	Handle upward

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Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series (ARP20-01EH-3)

(i)Caution

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series Details

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series Specification

Model Number Notation

Specifications

Optional parts

Structural Drawings

Component Parts

Replacement Parts

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series Dimensions

Pressure Gauge Options

Basic Information

Configure

Specification/Dimensions

type

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

Handle Direction / Position

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Specify Alterations

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