Body Size: 40, Thread: N (NPT), Port Size: 04 (1/2), Option: BC (B + C), Semi-Standard 1: 6 (Nylon Bowl), Semi-Standard 2: Z (NPT Porting requires Z, Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F)

Function: 4 (3 Position Exhaust Center), Body Option: 4 (Non plug-in, Individual Electrical Entry), Option: 1 (Direct Manual Override), Pilot: Internal Pilot, Voltage: 5 (24VDC), Lead Wire: D (DIN Connector), Surge Suppressor: Z (Light & Surge Suppressor), Manual Override: B (Locking Slotted Style), Piping: Side, Port Size: 04 (Sub-plate 1/2), Thread: T (NPTF)

Size: 4 (40), Valve Type: 1 (Normally Closed), Body Material: S (Stainless Steel), Seal Material: E (EPDM), Port Size: 04 (Thread; 1/2), Thread Type: F (G), Rated Voltage: 5 (24 VDC), Electrical Entry: WN (M12 Connector/without Connector Cable; with Surge Voltage Suppressor), Oil-free Option: None, Bracket: B (Bracket)

Size: 4 (40), Valve Type: 1 (Normally Closed), Body Material: S (Stainless Steel), Seal Material: F (FKM), Port Size: 04 (Thread; 1/2), Thread Type: N (NPT), Rated Voltage: 5 (24 VDC), Electrical Entry: DS (DIN Terminal, w/Surge Voltage Suppressor), Oil-free Option: None, Bracket: B (Bracket)

Body Size: 40, Back Flow: w/o Backflow, Thread: N (NPT), Port Size: 04 (1/2), Options: BC (B+C), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Bowl: 2 (Metal Bowl), Bowl Guard: None, Drain Port: w/Drain Cock, Exhaust Mechanism: Relieving Type, Flow Direction: Flow Direction: Left to Right, Drain Cock w/Barb Fitting: None, Pressure Units: Z [Product: psi, °C; Pressure Gauge: psi (and MPa)]

Body Size: 40, Backflow: w/o Backflow Function, Thread: F (G), Port Size: 04 (1/2), Options: BG (B+G), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

Body Size: 40, Backflow: w/o Backflow Function, Thread: F (G), Port Size: 04 (1/2), Options: B (w/Bracket), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

Size: 3 (30), Valve Type: 1 (Normally Closed), Body Material: C (Brass), Seal Material: N (NBR), Port Size: 04 (Thread; 1/2), Thread Type: N (NPT), Rated Voltage: B (24 VAC), Electrical Entry: DN (without DIN Connector, w/Surge Voltage Suppressor)

Size: 4 (40), Valve Type: 1 (Normally Closed), Body Material: S (Stainless Steel), Seal Material: F (FKM), Port Size: 04 (Thread; 1/2), Thread Type: N (NPT), Rated Voltage: B (24 VAC), Electrical Entry: DN (without DIN Connector, w/Surge Voltage Suppressor)

Size: 4 (40), Valve Type: 1 (Normally Closed), Body Material: S (Stainless Steel), Seal Material: N (NBR), Port Size: 04 (Thread; 1/2), Thread Type: N (NPT), Rated Voltage: B (24 VAC), Electrical Entry: DN (without DIN Connector, w/Surge Voltage Suppressor)

Size: 3 (30), Valve Type: 1 (Normally Closed), Body Material: S (Stainless Steel), Seal Material: N (NBR), Port Size: 04 (Thread; 1/2), Thread Type: N (NPT), Rated Voltage: B (24 VAC), Electrical Entry: DN (without DIN Connector, w/Surge Voltage Suppressor)

Size: 4 (40), Valve Type: 1 (Normally Closed), Body Material: C (Brass), Seal Material: F (FKM), Port Size: 04 (Thread; 1/2), Thread Type: N (NPT), Rated Voltage: B (24 VAC), Electrical Entry: WN (M12 Connector/without Connector Cable; with Surge Voltage Suppressor)

Rated Flow Range: 20 (2 to 16 L/min), Flow Adjustment Valve: w/o Flow Adjustment Valve, Thread: N (NPT), Port Size: 04 (1/2), Output Specification/Temperature Sensor: B (Out 1: PNP, Out 2: Flow Rate: PNP, Temp.: None, Temperature Sensor: None), Lead Wire: N (w/o Lead Wire and M8 Connector), Unit Specification: F (Instantaneous Flow: gal/min, Accumulated Flow: gal, Temperature: °F), Bracket

Size: 40 (1/2), Port Size: 04 (1/2, Size 40), Accessories: BC (B + C), Bowl: 8 (Metal Bowl w/Sight Glass), Flow Direction: Flow Direction - Left to Right

Size: 40 (1/2), Port Size: 04 (1/2, Size 40), Accessories: B (Mounting Bracket), Bowl: 8 (Metal Bowl w/Sight Glass), Flow Direction: R (Flow Direction - Right to Left)

Size: 40 (1/2), Port Size: 04 (1/2, Size 40), Accessories: BC (B + C), Bowl: 8 (Metal Bowl w/Sight Glass), Flow Direction: R (Flow Direction - Right to Left)

Size: 40 (1/2), Port Size: 04 (1/2, Size 40), Accessories: BD (B + D), Bowl: 8 (Metal Bowl w/Sight Glass), Flow Direction: R (Flow Direction - Right to Left)

Size: 40 (1/2), Port Size: 04 (1/2, Size 40), Accessories: BD (B + D), Bowl: 8 (Metal Bowl w/Sight Glass), Flow Direction: Flow Direction - Left to Right

This is a legacy product, and replaced by10-AR40-04-N-B, REGULATOR, MODULAR, CLEAN ROOM, AIRLINE EQUIPMENT, AR MASS PRO, F5, AR MASS PRO 1/2", 1.44301 lb, Regulator Series ARPages 346 through to 355ModelPort sizeOptionsRegulator Series ARPages 346 through to 355AR401/4, 3/8, 1/2BracketSquare embedded type pressure gauge (except the AR10)Round type pressure gauge Digital pressure switch

Material: T (SCS14 Cover, SS 316 Case, Fluororesin Gasket/O-ring, Fluororesin Seal), Element Length: A (ℓ250), Port Size: 04 (1/2 Rc), Element Type: S (Sintered Metal, Stainless Steel Material), Nominal Filtration Accuracy: 1 μm, Element Seal Material: T (Fluororesin), Accessory: B (Bracket)