Granzow, Inc.Your source for valves.
ValvesPumpsPressure & Temperature ControlsLiquid Level Controls
21AZ
General Purpose
2-way, direct acting, normally open solenoid valve
1/8"-1/4"
Pipe Sizes
0-435 psig
Operating Pressure
8W, 12W, 14W
Coils

ABOUT SERIES 21AZ SOLENOID VALVES
The 2-way, normally open solenoid valves in this series are available in sizes of 1/8" and 1/4". These valves are direct-operated and will work from 0 to 435 psig. They are used for various applications, such as heating and automation. 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 21AZ 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)
21A3ZV15D-8W 1/8" 1/16" 0.10 8 0 360/360
21A3ZV20D-8W 1/8" 5/64" 0.14 8 0 290/290
21A3ZV20G-12W 1/8" 5/64" 0.14 12 0 435/435
21A3ZV20G-14W 1/8" 5/64" 0.14 14 0 435/435
21A3ZV25D-8W 1/8" 3/32" 0.22 8 0 200/200
21A3ZV25G-12W 1/8" 3/32" 0.22 12 0 245/245
21A3ZV25G-14W 1/8" 3/32" 0.22 14 0 245/245
21A3ZV30D-8W 1/8" 1/8" 0.28 8 0 145/145
21A3ZV30G-12W 1/8" 1/8" 0.28 12 0 220/220
21A3ZV30G-14W 1/8" 1/8" 0.28 14 0 220/220
21A3ZV45D-8W 1/8" 3/16" 0.45 8 0 70/60
21A3ZV45G-12W 1/8" 3/16" 0.45 12 0 85/85
21A3ZV45G-14W 1/8" 3/16" 0.45 14 0 85/85
21A2ZV15D-8W 1/4" 1/16" 0.10 8 0 360/360
21A2ZV20D-8W 1/4" 5/64" 0.14 8 0 290/290
21A2ZV20G-12W 1/4" 5/64" 0.14 12 0 435/435
21A2ZV20G-14W 1/4" 5/64" 0.14 14 0 435/435
21A2ZV25D-8W 1/4" 3/32" 0.22 8 0 200/200
21A2ZV25G-12W 1/4" 3/32" 0.22 12 0 250/250
21A2ZV25G-14W 1/4" 3/32" 0.22 14 0 250/250
21A2ZV30D-8W 1/4" 1/8" 0.28 8 0 145/145
21A2ZV30G-12W 1/4" 1/8" 0.28 12 0 220/220
21A2ZV30G-14W 1/4" 1/8" 0.28 14 0 220/220
21A2ZV45D-8W 1/4" 3/16" 0.45 8 0 70/60
21A2ZV45G-12W 1/4" 3/16" 0.45 12 0 85/85
21A2ZV45G-14W 1/4" 3/16" 0.45 14 0 85/85
21A2ZV55D-8W 1/4" 7/32" 0.63 8 0 50/40
21A2ZV55G-12W 1/4" 7/32" 0.63 12 0 50/40
21A2ZV55G-14W 1/4" 7/32" 0.63 14 0 50/40
#2. NBR seal: For air, inert gas, water (14-195°F)
Series 21AZ 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)
21A3ZB15D-8W 1/8" 1/16" 0.10 8 0 360/360
21A3ZB20D-8W 1/8" 5/64" 0.14 8 0 290/290
21A3ZB20G-12W 1/8" 5/64" 0.14 12 0 435/435
21A3ZB20G-14W 1/8" 5/64" 0.14 14 0 435/435
21A3ZB25D-8W 1/8" 3/32" 0.22 8 0 200/200
21A3ZB25G-12W 1/8" 3/32" 0.22 12 0 245/245
21A3ZB25G-14W 1/8" 3/32" 0.22 14 0 245/245
21A3ZB30D-8W 1/8" 1/8" 0.28 8 0 145/145
21A3ZB30G-12W 1/8" 1/8" 0.28 12 0 220/220
21A3ZB30G-14W 1/8" 1/8" 0.28 14 0 220/220
21A3ZB45D-8W 1/8" 3/16" 0.45 8 0 70/60
21A3ZB45G-12W 1/8" 3/16" 0.45 12 0 85/85
21A3ZB45G-14W 1/8" 3/16" 0.45 14 0 85/85
21A2ZB15D-8W 1/4" 1/16" 0.10 8 0 360/360
21A2ZB20D-8W 1/4" 5/64" 0.14 8 0 290/290
21A2ZB20G-12W 1/4" 5/64" 0.14 12 0 435/435
21A2ZB20G-14W 1/4" 5/64" 0.14 14 0 435/435
21A2ZB25D-8W 1/4" 3/32" 0.22 8 0 200/200
21A2ZB25G-12W 1/4" 3/32" 0.22 12 0 250/250
21A2ZB25G-14W 1/4" 3/32" 0.22 14 0 250/250
21A2ZB30D-8W 1/4" 1/8" 0.28 8 0 145/145
21A2ZB30G-12W 1/4" 1/8" 0.28 12 0 220/220
21A2ZB30G-14W 1/4" 1/8" 0.28 14 0 220/220
21A2ZB45D-8W 1/4" 3/16" 0.45 8 0 70/60
21A2ZB45G-12W 1/4" 3/16" 0.45 12 0 85/85
21A2ZB45G-14W 1/4" 3/16" 0.45 14 0 85/85
21A2ZB55D-8W 1/4" 7/32" 0.63 8 0 50/40
21A2ZB55G-12W 1/4" 7/32" 0.63 12 0 50/40
21A2ZB55G-14W 1/4" 7/32" 0.63 14 0 50/40