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31AU
General Purpose
3-way, direct acting, universal solenoid valve
1/8"-1/4"
Pipe Sizes
0-260 psig
Operating Pressure
8W
Coil

ABOUT SERIES 31AU SOLENOID VALVES
These 3-way, universal solenoid valves are available in two sizes, 1/8" and 1/4". The valves will operate from 0 to 260 psig. These solenoid valves can be used for normally closed and normally open applications. The high quality of construction materials used in these solenoid valves combined with extensive performance testing ensure maximum reliability and life. The valve bodies are made from brass, and come with Buna and Viton seals.
Electrical Connection
Rating: NEMA 4
Strain relief connector: Model 009
1/2" conduit connector: Model 010
6 ft. power cord: Model GRN100
Materials of Construction
Body: Brass
Armature Tube: Stainless Steel 300
Fixed Core: Stainless Steel 400
Plunger: Stainless Steel 400
Spring: Stainless Steel 300
Shading Ring: Copper

SOLENOID VALVE MODELS, BY SEAL MATERIAL
For more information on a solenoid valve in this series, select any available valve model below.
#1. FKM seal: For air, inert gas, water, synthetic oils (14-280°F)
Series 31AU valve models with FKM sealing material:
Model # Pipe Size
(Inch)
Orifice Size
(Inch)
Flow Factor
(CV)
Watt Rating
(W)
Min. Pressure
(PSI)
Max. Pressure
(AC/DC)
31A3AV25U-8W 1/8" 3/32" 0.22 8 0 60/60
31A3EV30U-8W 1/8" 1/8" 0.28 8 0 50/50
31A3FV15U-8W 1/8" 1/16" 0.10 8 0 145/145
31A3GV10U-8W 1/8" 3/64" 0.05 8 0 260/260
31A2AV25U-8W 1/4" 3/32" 0.22 8 0 60/60
31A2EV30U-8W 1/4" 1/8" 0.28 8 0 50/50
31A2FV15U-8W 1/4" 1/16" 0.10 8 0 145/145
31A2GV10U-8W 1/4" 3/64" 0.05 8 0 260/260
#2. NBR seal: For air, inert gas, water (14-195°F)
Series 31AU valve models with NBR sealing material:
Model # Pipe Size
(Inch)
Orifice Size
(Inch)
Flow Factor
(CV)
Watt Rating
(W)
Min. Pressure
(PSI)
Max. Pressure
(AC/DC)
31A3AB25U-8W 1/8" 3/32" 0.22 8 0 60/60
31A3EB30U-8W 1/8" 1/8" 0.28 8 0 50/50
31A3FB15U-8W 1/8" 1/16" 0.10 8 0 145/145
31A3GB10U-8W 1/8" 3/64" 0.05 8 0 260/260
31A2AB25U-8W 1/4" 3/32" 0.22 8 0 60/60
31A2EB30U-8W 1/4" 1/8" 0.22 8 0 50/50
31A2FB15U-8W 1/4" 1/16" 0.10 8 0 145/145
31A2GB10U-8W 1/4" 3/64" 0.05 8 0 260/260