Body Size: 30, Thread: N (NPT), Port Size: 02 (1/4), Handle/Bonnet Material: A (Flame Resistant PBT), Options: BS (w/Bracket + Built-in Silencer, EXH Port), Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label)

Body Size: 40, Thread: N (NPT), Port Size: 06 (3/4), Handle/Bonnet Material: A (Flame Resistant PBT), Options: BS (w/Bracket + Built-in Silencer, EXH Port), Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label)

Body Size: 4, Thread: N (NPT), Port Size: 03 (3/8), Handle/Bonnet Material: A (Flame Resistant PBT), Options: None, Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label), Made to Order: X1 (Body: Red)

Body Size: 4, Thread: N (NPT), Port Size: 04 (1/2), Handle/Bonnet Material: A (Flame Resistant PBT), Options: BS (w/Bracket + Built-in Silencer, EXH Port), Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label)

Body Size: 4, Thread: N (NPT), Port Size: 04 (1/2), Handle/Bonnet Material: A (Flame Resistant PBT), Options: None, Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label), Made to Order: X1 (Body: Red)

Body Size: 40, Thread: N (NPT), Port Size: 04 (1/2), Handle/Bonnet Material: A (Flame Resistant PBT), Options: None, Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label), Made to Order: X1 (Body: Red)

Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Handle/Bonnet Material: A (Flame Resistant PBT), Options: BS (w/Bracket + Built-in Silencer, EXH Port), Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label)

Body Size: 40, Thread: N (NPT), Port Size: 03 (3/8), Handle/Bonnet Material: A (Flame Resistant PBT), Options: None, Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label), Made to Order: X1 (Body: Red)

Body Size: 40, Thread: N (NPT), Port Size: 06 (3/4), Handle/Bonnet Material: A (Flame Resistant PBT), Options: None, Semi-Standard: RZ (Flow Direction: Right to Left + psi as Unit Displayed on Label), Made to Order: X1 (Body: Red)

This is a legacy product, and replaced byAR40-N04-Z-B-X48, REGULATOR, MODULAR, EPOXY COAT, AIRLINE EQUIPMENT, AR MASS PRO, FC, AR MASS PRO 1/2 MODULAR (PT), 1.03620 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

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: CG (C + G), Attachment: Standard, Semi-Standard 1: 16C (1 + 6 + C), Semi-Standard 2: RZ (R + Z)

Body Size: 25, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: SV (S + V), Semi-Standard 1: 18J (1 + 8 + J), Semi-Standard 2: RZ (R + Z)

Body Size: 20, Thread: N (NPT), Port: 01 (1/8), Option: CG (C + G), Attachment: KV (K + V), Semi-Standard 1: 12 (1 + 2), Semi-Standard 2: RZ (R + Z)

Body Size: 25, Thread: N (NPT), Port: 03 (3/8), Option: DE (D + E), Attachment: KV (K + V), Semi-Standard 1: 12 (1 + 2), Semi-Standard 2: RZ (R + Z)

Body Size: 30, Thread: N (NPT), Port: 03 (3/8), Option: DE (D + E), Attachment: K (Check Valve), Semi-Standard 1: 2 (Metal Bowl), Semi-Standard 2: RZ (R + Z)

Body Size: 40, Thread: N (NPT), Port: 02 (1/4), Option: DE (D + E), Attachment: KV (K + V), Semi-Standard 1: 18 (1 + 8), Semi-Standard 2: RZ (R + Z)

Body Size: 40, Thread: N (NPT), Port: 02 (1/4), Option: DG (D + G), Attachment: KV (K + V), Semi-Standard 1: 12 (1 + 2), Semi-Standard 2: RZ (R + Z)

Body Size: 40, Thread: N (NPT), Port: 03 (3/8), Option: DG (D + G), Attachment: KV (K + V), Semi-Standard 1: 12 (1 + 2), Semi-Standard 2: RZ (R + Z)

Body Size: 40, Thread: N (NPT), Port: 04 (1/2), Option: DE (D + E), Attachment: KV (K + V), Semi-Standard 1: 18 (1 + 8), Semi-Standard 2: RZ (R + Z)

Body Size: 50, Thread: N (NPT), Port: 06 (3/4), Option: DE (D + E), Attachment: Standard, Semi-Standard 1: 3 (Lubricator w/Drain Cock), Semi-Standard 2: RZ (R + Z)