A UL-compliant . Refer to the table shown below for UL-compliant. For Oil VXD21 Valve: N.C., Electrical entry: Grommet, With grommet surge voltage suppressor Model 21 Orifice diameter 3 4 5 Valve/Body configuration 0 Solenoid valve option Nil A H Suffix Nil Port size 02 03 04 06 Thread type Nil T F N Rated voltage 1 3 5 6 8 Electrical entry G GS Full-wave rectifier R Identification symbol 1 Bracket Nil B For Oil VXD21 Valve: N.O., Electrical entry: Conduit Model 21 Orifice diameter 4 5 Valve/Body configuration 2 Solenoid valve option Nil A H Suffix Nil Port size 02 03 04 06 Thread type Nil T F N Rated voltage 1 2 3 4 7 8 J Electrical entry C Full-wave rectifier R Identification symbol 1 Bracket Nil B For Oil VXD22 Valve: N.C., Electrical entry: Grommet, With grommet surge voltage suppressor Model 22 Orifice diameter 6 Valve/Body configuration 0 Solenoid valve option Nil A H Suffix Nil Port size 10 Thread type Nil T F N Rated voltage 1 3 5 6 8 Electrical entry G GS Full-wave rectifier Nil R Identification symbol 1 Bracket Nil B For Oil VXD21 Valve: N.O., Electrical entry: Grommet Model 21 Orifice diameter 4 5 Valve/Body configuration 2 Solenoid valve option Nil A H Suffix Nil Port size 02 03 04 06 Thread type Nil T F N Rated voltage 1 3 8 Electrical entry G Full-wave rectifier R Identification symbol 1 Bracket Nil B For Oil VXD21 Valve: N.C., Electrical entry: DIN terminal Model 21 Orifice diameter 3 4 5 Valve/Body configuration 0 Solenoid valve option Nil A H Suffix Nil Port size 02 03 04 06 Thread type Nil T F N Rated voltage 5 6 Electrical entry D Identification symbol 1 Bracket Nil B 69-1 Series VXD21/22/23