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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.
Part Number
Configured Part Number is shown.
ARP20-02B-R

ARP20/ARP20K: product images

ARP30/ARP30K: product images

ARP40/ARP40K: product images

Model number example
| - | Code | Contents | (1) | |||||
|---|---|---|---|---|---|---|---|---|
| Body size | ||||||||
| 20 | 30 | 40 | ||||||
| (2) | With backflow function | No symbol | Without 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 | E1Note 3) | Output: NPN output / Lead wire electrical entry: wiring bottom entry | ● | ● | ● | |||
| E2Note 3) | Output: NPN output / Lead wire electrical entry: wiring top entry | ● | ● | ● | ||||
| E3Note 3) | Output: PNP output / Lead wire electrical entry: wiring bottom entry | ● | ● | ● | ||||
| E4Note 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 | ● | ● | ● | ||
| R | Flow direction: right → left | ● | ● | ● | ||||
| e | Handle direction | No symbol | Handle downward | ● | ● | ● | ||
| 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) | ||||
| 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) | |||
| 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 | ||
| 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 | |
| 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 | ||
| 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 | ||
| 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)] | ||||

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series: structural drawings
| Number | Part name | Materials | Additional notes |
|---|---|---|---|
| 1 | Body | Die-cast aluminum | External color: urban white |
| 2 | Bonnet | Polyacetal | External color: urban white |
| Number | Part name | Materials | Part number | ||
|---|---|---|---|---|---|
| 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 | ||
(Unit: mm)

Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series: dimensional drawing
| 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 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Part Number |
|---|
| ARP20-02B-R |
| 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 | 1/4 | [(Left)] Right→Left | Rc | 1/4 | [Not Provided] No Pressure Gauge | 20 | With Bracket | 0.005 to 0.4 MPa | Nameplate and pressure gauge units: MPa | Handle downward |
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| 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 ARP20-02B-R in the Direct-Operated Precision Regulator, Modular Type (With Backflow Function), ARP20(K) To ARP40(K) Series series.
| Part Number |
|---|
| ARP20-01-1Y |
| ARP20-01-3 |
| ARP20-01-3Y |
| ARP20-02B-RY |
| ARP20-02B-Y |
| ARP20-02BE |
| 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 | [Not Provided] No Pressure Gauge | 20 | None | 0.005 to 0.2 MPa | Nameplate and pressure gauge units: MPa | Handle upward | ||
MYR 334.14 | 1 Piece(s) | 10 Day(s) or more | 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 | 1/4 | [(Left)] Right→Left | Rc | 1/4 | [Not Provided] No Pressure Gauge | 20 | With Bracket | 0.005 to 0.4 MPa | Nameplate and pressure gauge units: MPa | Handle upward | ||
MYR 344.45 | 1 Piece(s) | 13 Day(s) or more | No | Rc | 1/4 | [(Right)] Left→Right | Rc | 1/4 | [Not Provided] No Pressure Gauge | 20 | With Bracket | 0.005 to 0.4 MPa | Nameplate and pressure gauge units: MPa | Handle upward | ||
MYR 361.99 | 1 Piece(s) | 5 Day(s) or more | No | Rc | 1/4 | [(Right)] Left→Right | Rc | 1/4 | [With Pressure Gauge] Square type inserted pressure gauge (with limit indicator) | 20 | With Bracket | 0.005 to 0.4 MPa | Nameplate and pressure gauge units: MPa | Handle downward |
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