2-WAY NORMALLY OPEN Valve
A complete line of valves with a great selection of options and exceptional proven performance. The standard in the field. Air, water, and other fluids compatible with standard Buna seals. Hot water, steam, gasoline, and many oils require special seal materials.
- The flagship valve initially created for fluid power industry.
- Heavy duty and made of stainless steel.
- A real workhorse with proven performance.
- It has the greatest amount of options available of all the valves.
- Wide range of orifice sizes from 1/32" to 1/8".
| + MAX. OPER. PRESS. DIFF. | ORIFICE SIZE | CV FACTOR | VALVE NUMBER GROMMET HOUSING | CONDUIT HOUSING | |||||
|---|---|---|---|---|---|---|---|---|---|
| AC | DC | 1/8 NPT PORTS | 1/4 NPT PORTS | 1/8 NPT PORTS | 1/4 NPT PORTS | ||||
| 400 | (700)* | 400 | (700)* | 1/32 | .024 | 21G7XGM | 21G9ZGM | 21G7XCM | 21G9ZCM |
| 235 | (500) | 235 | (500) | 3/64 | .053 | 21H7XGM | 21H9ZGM | 21H7XCM | 21H9ZCM |
| 150 | (350) | 150 | (350) | 1/16 | .095 | 21J7XGM | 21J9ZGM | 21J7XCM | 21J9ZCM |
| 100 | (150) | 100 | (150) | 3/32 | .156 | 21K7XGM | 21K9ZGM | 21K7XCM | 21K9ZCM |
| 35 | (40) | 35 | (40) | 1/8 | .201 | 21N7XGM ^ | 21N9ZGM ^ | 21N7XCM ^ | 21N9ZCM ^ |
^ VALVES WITH 1/8 N.O. ORIFICE ARE UL LISTED ONLY
* FKM seals not recommended for pressure ratings above 500 PSI.
+ Ratings in brackets are optional extended ratings; consult factory
Ordering Information:
When ordering valves or repair packs add voltage and frequency to complete valve number. for examples: valve (21J9ZGM 120/60) repair pack (K21JDX AC)
When ordering operators add the letter “O” to the front of the valve number, replace body port number with the letter “D”: example: operator (O21JDDGM 120/60)
Operating Conditions
- Media
- Air, water, and other fluids compatible with standard Buna seals. Hot water, steam, gasoline, and many oils require special seal materials. (Series 20 pressure ratings may change due to the viscosity of the liquid.)*
- Valve Temperature Range
- Standard Valves – 0°F (-18°C) to 104°F (40°C) ambient; 0°F (-18°C) to 150°F (65°C) media. Optional Valves – can tolerate much higher or much lower ambient and media temperatures.
- Maximum Operating Pressure Differentials
- See table above.
- Burst Pressure
- 5000 PSI
- Leakage
- Bubble tight for standard valves.
- Vacuum
- To 5 Microns*
Electrical Characteristics
- Coil Voltage
- 12/DC, 24/DC, 48/DC, 125/DC, 120/60-110/50, 240/60, and 24/60.
- Nominal Power
- AC — 8.7 Watts DC — 9.5 Watts
- Coil Construction
- Molded (Std.), Non-molded Class A and Potted Class F or Class H (Opt.)
- Typical Response Time on Air
- 4 - 16 Milliseconds
- Operating Speed
- Up to 600 CPM
- Duty Cycle
- Continuous
Mechanical Characteristics
- Internal Components
- Stainless Steel. Copper – AC Only.
- Elastomers
- Nitrile (Buna) (Std.). Many other elastomers available.*
- Orifice Diameter
- See table above.
- Porting
- Standard 1/8" and 1/4" NPT (other ports available)*
- Housing
- Grommet and 1/2" NPT conduit - many options available.*
- Listings
- Most valves are UL and CSA listed.*
- Life Expectancy
- Millions of cycles, depending on application, lubrication, etc.
- Valve Weight
- Grommet Valve: 1.13 lb Conduit Valve: 1.19 lb
- Repair Packs
- See table above.
- Options
- Alternate Port Locations, Metering, Manual Override, Alternate Elastomers, Spade Terminal Coil, European Style DIN, Explosion Proof and Magnetic Latching Coil
Series 20 General Purpose Valves Conduit
MODEL 21 1/4-18 NPT
2WNO CONDUIT CONNECTION
MODEL 21 1/8-27 NPT
2WNO CONDUIT CONNECTION
MODEL 21 MANUAL OVERRIDE
2WNO
CONDUIT COIL CONNECTION
Series 20 General Purpose Valves DIN
MODEL 21 1/4-18 NPT
2WNO
DIN STYLE COIL
MODEL 21 1/8-27 NPT
2WNO
DIN STYLE COIL
MODEL 21 MANUAL OVERRIDE
2WNO
DIN STYLE COIL
Series 20 General Purpose Valves Grommet
MODEL 21 1/4-18 NPT
2WNO GROMMET WITH LEADS
MODEL 21 1/8-27 NPT
2WNO GROMMET WITH LEADS
MODEL 21 MANUAL OVERRIDE
2WNO
GROMMET HOUSING WITH LEADS
Series 20 General Purpose Valves Yoke Leads
MODEL 21 1/4-18 NPT
2WNO
MOLDED COIL WITH YOKE
MODEL 21 1/8-27 NPT
2WNO
MOLDED COIL WITH YOKE
MODEL 21 MANUAL OVERRIDE
2WNO
MOLDED COIL WITH LEADS
Series 20 General Purpose Valves Yoke Spades
MODEL 21 1/4-18 NPT
2WNO
SPADE COIL WITH YOKE
MODEL 21 1/8-27 NPT
2WNO
SPADE COIL WITH YOKE
Series 20 General Purpose Valves Conduit
MODEL 21 1/4-18 NPT
2WNO CONDUIT CONNECTION
MODEL 21 1/8-27 NPT
2WNO CONDUIT CONNECTION
MODEL 21 MANUAL OVERRIDE
2WNO
CONDUIT COIL CONNECTION
Series 20 General Purpose Valves DIN
MODEL 21 1/4-18 NPT
2WNO
DIN STYLE COIL
MODEL 21 1/8-27 NPT
2WNO
DIN STYLE COIL
MODEL 21 MANUAL OVERRIDE
2WNO
DIN STYLE COIL
Series 20 General Purpose Valves Grommet
MODEL 21 1/4-18 NPT
2WNO GROMMET WITH LEADS
MODEL 21 1/8-27 NPT
2WNO GROMMET WITH LEADS
MODEL 21 MANUAL OVERRIDE
2WNO
GROMMET HOUSING WITH LEADS
Series 20 General Purpose Valves Yoke Leads
MODEL 21 1/4-18 NPT
2WNO
MOLDED COIL WITH YOKE
MODEL 21 1/8-27 NPT
2WNO
MOLDED COIL WITH YOKE
MODEL 21 MANUAL OVERRIDE
2WNO
MOLDED COIL WITH LEADS
Series 20 General Purpose Valves Yoke Spades
MODEL 21 1/4-18 NPT
2WNO
SPADE COIL WITH YOKE
MODEL 21 1/8-27 NPT
2WNO
SPADE COIL WITH YOKE
MODEL 21 MANUAL OVERRIDE
2WNO
YOKE WITH SPADE TERMINALS
Series 20 General Purpose Valves Conduit/Bracket Connection
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MODEL 21 1/4-18 NPT
2WNO
CONDUIT/BRACKET CONNECTION
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MODEL 21 1/8-27 NPT
2WNO
CONDUIT/BRACKET CONNECTION
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MODEL 21 MANUAL OVERRIDE
2WNO
CONDUIT/BRACKET CONNECTION
Series 20 General Purpose Valves Grommet/Bracket Connection
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MODEL 21 1/4-18 NPT
2WNO
GROMMET/BRACKET WITH LEADS
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MODEL 21 1/8-27 NPT
2WNO
GROMMET/BRACKET WITH LEADS
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MODEL 21 MANUAL OVERRIDE
2WNO
GROMMET/BRACKET HOUSING WITH LEADS
PeterPaul has created this page for you so you can calculate the flow or Cv (flow coefficient) to make the relationship visible between the pressure drop (the difference in pressure between two points of a liquid/gas carrying network) and the flow rate.
The use of this flow coefficient (Cv) calculator offers a standard calculation to compare valve capacities and sizing for a wide range of applications. The type and sizing of a valve or regulator can have a large impact on the performance of the assembly for transferring gas or liquids in the system.
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