2-WAY NORMALLY OPEN Valve
Our original mini — engineered for space economy without sacrificing performance. Typical applications include medical, analytical instrumentation. Air, water, and other fluids compatible with standard Buna seals. Hot water, steam, gasoline, and many oils require special seal materials.
- Tough with options to use in hazardous location environments or low watt applications.
- High quality engineering.
| MAX. OPER. PRESS. DIFF. | ORIFICE SIZE | CV FACTOR | VALVE NUMBER GROMMET HOUSING | CONDUIT HOUSING | |
|---|---|---|---|---|---|
| AC | DC | 1/8 NPT PORTS | 1/8 NPT PORTS | ||
| 400 | 200 | 1/32 | .020 | 51G8XGM | 51G8XCM |
| 200 | 100 | 3/64 | .048 | 51H8XGM | 51H8XCM |
| 125 | 60 | 1/16 | .075 | 51J8XGM | 51J8XCM |
| 40 | 40 | 3/32 | .150 | 51K8XGM | 51K8XCM |
Ordering Information:
When ordering valves or repair packs add voltage and frequency to complete valve number. for examples: valve (51J8XGM 120/60) repair pack (K51JDX 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 (O51JDDGM 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 50 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 — 6.0 Watts, DC — 7.0 Watts
- Coil Construction
- Molded and potted Class F. (Class H optional)
- 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" 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: 0.38 lb Conduit Valve: 0.44 lb
- Repair Packs
- See table above.
- Options
- Alternate Port Locations, Metering, Alternate Elastomers, Low Wattage, Spade Terminal Coil and Explosion Proof
Series 50 General Purpose Valves Conduit
MODEL 51
2WNO CONDUIT CONNECTION
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
MODEL 51 STUD MOUNT BODY
2WNO CONDUIT CONNECTION
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
Series 50 General Purpose Valves Grommet
MODEL 51
2WNO GROMMET WITH LEADS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
MODEL 51 STUD MOUNT BODY
2WNO
GROMMET WITH LEADS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
Series 50 General Purpose Valves Yoke Leads
MODEL 51
2WNO
YOKE WITH LEADS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
MODEL 51 STUD MOUNT BODY
2WNO
YOKE WITH LEADS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
Series 50 General Purpose Valves Yoke Spades
MODEL 51
2WNO
YOKE WITH SPADE TERMINALS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
MODEL 51 STUD MOUNT BODY
2WNO
YOKE WITH SPADE TERMINALS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
Series 50 General Purpose Valves Grommet/Bracket Connection
Minimum quantity required. Please contact sales for additional assistance.
sales@peterpaul.com 
MODEL 51
2WNO
GROMMET/BRACKET WITH LEADS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
Minimum quantity required. Please contact sales for additional assistance.
sales@peterpaul.com 
MODEL 51 STUD MOUNT BODY
2WNO
GROMMET/BRACKET WITH LEADS
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
Series 50 General Purpose Valves Conduit/Bracket Connection
Minimum quantity required. Please contact sales for additional assistance.
sales@peterpaul.com 
MODEL 51
2WNO
CONDUIT/BRACKET CONNECTION
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
Minimum quantity required. Please contact sales for additional assistance.
sales@peterpaul.com 
MODEL 51 STUD MOUNT BODY
2WNO
CONDUIT/BRACKET CONNECTION
Download Drawings IGS SolidWorks SLDPRT STEP Parasolid DXF Adobe PDF 2D Drawing
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Series 50 OPERATORS CONDUIT
MODEL 51 1/8-27
2WNO CONDUIT CONNECTIONDownload Drawings DXF IGS Adobe PDF 2D Drawing SolidWorks SLDASM SolidWorks SLDDRW SolidWorks SLDPRT STEP Parasolid
Series 50 OPERATORS GROMMET
MODEL 51 1/8-27
2WNO GROMMET WITH LEADSDownload Drawings DXF IGS Adobe PDF 2D Drawing SolidWorks SLDASM SolidWorks SLDDRW SolidWorks SLDPRT STEP Parasolid
Series 50 OPERATORS YOKE LEADS
MODEL 51 1/8-27
2WNO MOLDED COIL WITH YOKEDownload Drawings DXF IGS Adobe PDF 2D Drawing SolidWorks SLDASM SolidWorks SLDDRW SolidWorks SLDPRT STEP Parasolid
Series 50 OPERATORS YOKE SPADE
MODEL 51 1/8-27
2WNO SPADE COIL WITH YOKEDownload Drawings DXF IGS Adobe PDF 2D Drawing SolidWorks SLDASM SolidWorks SLDDRW SolidWorks SLDPRT STEP Parasolid
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.
Our sales department is ready to answer questions and to solve your valve needs. Please feel free to call, chat or email us.