This is a legacy product, and replaced byAW20-N02H-CZ-B, FILTER REGULATOR, MODULAR, AIRLINE EQUIPMENT, AW MASS PRO, DC, AW MASS PRO 1/4 MODULAR (NPT), 0.77161 lb

This is a legacy product, and replaced byAR30-N02H-1Z-B, REGULATOR, MODULAR, AIRLINE EQUIPMENT, AR REGULATOR, DC, AR 1/4INCH MODULAR (NPT), 0.96452 lb

This is a legacy product, and replaced byAW20-N02H-CZ-B

This is a legacy product, and replaced byAW20-N02H-1CZ-B

This is a legacy product, and replaced byAW20-N02H-6CZ-B

This is a legacy product, and replaced byAR20-N02H-1Z-B, REGULATOR, MODULAR, AIRLINE EQUIPMENT, AR MASS PRO, DC, AR MASS PRO 1/4 MODULAR (PT), .61160 lb

This is a legacy product, and replaced byAR20-N02H-NZ-B, REGULATOR, MODULAR OZONE *LQA, AIRLINE EQUIPMENT, AR MASS PRO, DC, AR MASS PRO 1/4 MODULAR (PT), .44092 lb, Regulator Series ARPages 346 through to 355ModelPort sizeOptionsRegulator Series ARPages 346 through to 355AR201/8, 1/4BracketSquare embedded type pressure gauge (except the AR10)Round type pressure gauge Digital pressure

This is a legacy product, and replaced byAW20-N02H-2Z-B

Size: 1/8, Port Size: 1/4, Size 20, Accessories: Panel Mount Nut, Handle Orientation: Handle Down

Special Applications: Copper, Fluorine & Silicon-free+Low Particle Generation, Body Size: 20, Reverse Flow: No, Thread: NPT, Port Size: 02 [1/4 (Size 20, 25, 30, 40)], Accessory, Not Attached: H [Set Nut for Panel Mount (Size 20 to 40)], Option: Nameplate/Caution Plate for Bowl in Imperial Units

Special Applications: 21-AR (Copper, Fluorine & Silicon-free+Low Particle Generation), Body Size: 20, Reverse Flow: No, Thread: N (NPT), Port Size: 02 [1/4 (Size 20, 25, 30, 40)], Accessory, Not Attached: H [Set Nut for Panel Mount (Size 20 to 40)], Option: Z (Nameplate/Caution Plate for Bowl in Imperial Units )

Regulator, Pressure Boosting Valve: -, Regulator Type: -, Shape: -, Operating Environment: -, Compatible Fluid: -, Exhaust Mechanism (Air Bleed): -, Reverse Flow Function (Relief): -, Supply Side Connection Type: -, Supply Side, Connection Diameter: -, Flow Direction: -, Control Side Connection Type: -, Control Side, Connection Diameter: -, Pressure Gauge: -, Size of Body: -, Accessory: -

Body Size: 20, Backflow: w/o Backflow Function, Thread: NPT, Port Size: 1/4, Options: w/Set Nut, for Panel Mount, Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale, Made to Order: 0.4 MPa Setting

Size: 20 (1/8), Port Size: 02 (1/4, Size 20), Accessories: H (Panel Mount Nut), Handle Orientation: Handle Down

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 02 (1/4), Options: H (w/Set Nut, for Panel Mount), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale), Made to Order: X406 (0.4 MPa Setting)

Note) The set nuts of the AR-A series and those of the AR-B/AR-D series differ in size as well as part number.
The AR-A series catalog can be found here.
The AR-B series catalog can be found here.

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.

Size: 1/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: Panel Mount w/Set Nut, Option 1: None, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F

When assembling high-pressure special order products, AF20 to 60-*-A-X425 and AR20 to 60-*-B-X425, prepare a nipple for installation.

Special Applications: Clean Series, Body Size: 20, Reverse Flow: No, Thread: NPT, Port Size: 02 [1/4 (Size 20, 25, 30, 40)], Accessory, Not Attached: H [Set Nut for Panel Mount (Size 20 to 40)], Option: N+Z