Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: B (Bracket), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F)

Body Size: 20, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 01 (1/8), Option: w/o Mounting Option, w/o Pressure Gauge, Semi-Standard: NRY (N + R + Y)

Body Size: 20, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 01 (1/8), Option: B (Assembly of a Bracket & Set Nuts), Semi-Standard: N (Non-Relieving Exhaust Mechanism)

Body Size: 20, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 01 (1/8), Option: w/o Mounting Option, w/o Pressure Gauge, Semi-Standard: 1NR (1 + N + R)

Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: B (Bracket), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F)

Base Mounted Wiring: 01 (Plug-in, Insert Plug w/Lead Wire), Pilot Type: Internal Pilot or None, Junction Cover: Separate Junction Cover or None, Stations: 7 Stations, Passage: 1 [P and EA,EB: Common, Port A,B: Side (Type 20/30, Port A,B: Top)], Port Size: 01 (1/8), Thread: N (NPT), Control Unit: AP (Air Filter w/Auto Drain, Regulator, Air Release Valve,Pressure Switch), Voltage of Air Release

Body Size: 22, Pilot Type: 2 (Internal Pilot Solenoid), Port: 01 (1/8), Thread: N (NPT), Voltage: S (5 VDC), Electrical Entry: G (Grommet Lead Wire 300mm), Light/Surge Voltage Suppressor: U (w/Light Surge Voltage Suppressor, Non-polar Type), Manual Override: Non-locking Push Style or None, Option: N (Pilot Exhaust Silencer)

Model: 31, Orifice: 1 (1.5mm), Style: 4 (COM, Single Unit), Option: N (SS/Ag, Seals: FKM, Class H), Suffix: Standard, Port Size: 01 (1/8), Thread: N (NPT), Voltage: 3 (110VAC 50/60HZ), Electrical Entry: G (Grommet), Surge Suppressor: Non, Rectifier: None (for DC or AC Class H Coil), Bracket: B (Bracket)

Model: 31, Orifice: 1 (1.5mm), Style: 0 (N.C., Single Unit), Option: N (SS/Ag, Seals: FKM, Class H), Suffix: Standard, Port Size: 01 (1/8), Thread: N (NPT), Voltage: 3 (110VAC 50/60HZ), Electrical Entry: T (with Conduit Terminal), Surge Suppressor: L (w/Light), Rectifier: None (for DC or AC Class H Coil)

Size: 20, Backflow Function: None, Thread: N (NPT), Port Size: 01 (1/8), Accessory: E (Square Embedded Pressure Gauge w/Limit Indicator), Specifications: 1Y (1 + Y), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: K (Backflow Function), Thread: N (NPT), Port Size: 01 (1/8), Accessory: EH (E+H), Specifications: 1 (0.005 to 0.2 MPa Setting), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: K (Backflow Function), Thread: N (NPT), Port Size: 01 (1/8), Accessory: BE3 (B+E3), Specifications: 1 (0.005 to 0.2 MPa Setting), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: K (Backflow Function), Thread: N (NPT), Port Size: 01 (1/8), Accessory: BE4 (B+E4), Specifications: 3 (0.008 to 0.6 MPa Setting), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: K (Backflow Function), Thread: N (NPT), Port Size: 01 (1/8), Accessory: BE (B+E), Specifications: 3 (0.008 to 0.6 MPa Setting), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: K (Backflow Function), Thread: N (NPT), Port Size: 01 (1/8), Accessory: BE4 (B+E4), Specifications: 1 (0.005 to 0.2 MPa Setting), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: None, Thread: N (NPT), Port Size: 01 (1/8), Accessory: G (Round Pressure Gauge w/Limit Indicator), Specifications: Y (Upward Facing Knob), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: K (Backflow Function), Thread: N (NPT), Port Size: 01 (1/8), Accessory: BE3 (B+E3), Specifications: 3 (0.008 to 0.6 MPa Setting), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: None, Thread: N (NPT), Port Size: 01 (1/8), Accessory: E1 (NPN Output, Electrical Entry: Wiring Bottom Entry), Specifications: 1Y (1 + Y), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: None, Thread: N (NPT), Port Size: 01 (1/8), Accessory: E3 (PNP Output, Electrical Entry: Wiring Bottom Entry), Specifications: 1Y (1 + Y), Pressure Unit: Z (Name plate & Pressure Gauge in Imperial Units: psi)

Size: 20, Backflow Function: None, Thread: N (NPT), Port Size: 01 (1/8), Accessory: E1 (NPN Output, Electrical Entry: Wiring Bottom Entry), Specifications: 0.005 to 0.4MPa Setting, Pressure Unit: ZA (Digital Pressure Switch: w/Unit Coversion Function)