2-Way Normally Open Valve
This valve uses the same kinetic energy impact mechanism as the EH22 but incorporates an internal rocker arm to reverse the action of the sealing pin. The kinetic energy of the plunger is applied to one end of the rocker arm when the coil is de-energized. This lifts the sealing pin, on the opposite end of the rocker arm, against the force of high pressure. A return spring acts directly on the pin, sealing the orifice when the coil is energized. For use on Air and other non-corrosive gasses, water and oil.
- Precision stainless steel rocker arm.
- Kel-F pin sealing element.
- Orifice guides the sealing pin for near perfect alignment.
- Simple construction...only three moving parts.
- Explosion proof construction.
| MAX. OPER. PRESS. DIFF. LIQUID | ORIFICE SIZE | CV FACTOR | VALVE NUMBER CONDUIT HOUSING | IECEx/ATEX VALVE NUMBER CONDUIT HOUSING |
|---|---|---|---|---|
| AC/DC | LIQUID 1/8 NPT | LIQUID 1/8 NPT | ||
| 3000 | 1/32 | .024 | EH21G7DCCML-∆ | EHA21G7DCCML-∆ |
| 1500 | 3/64 | .052 | EH21H7DCCML-∆ | EHA21H7DCCML-∆ |
| 850 | 1/16 | .095 | EH21J7DCCML-∆ | EHA21J7DCCML-∆ |
| 300 | 3/32 | .156 | EH21K7DCCML-∆ | EHA21K7DCCML-∆ |
| MAX. OPER. PRESS. DIFF. GAS | ORIFICE SIZE | CV FACTOR | VALVE NUMBER CONDUIT HOUSING | IECEx/ATEX VALVE NUMBER CONDUIT HOUSING |
|---|---|---|---|---|
| AC/DC | GAS 1/8 NPT | GAS 1/8 NPT | ||
| 3000 | 1/32 | .024 | EH21G7DCCMG-∆ | EHA21G7DCCMG-∆ |
| 2500 | 3/64 | .052 | EH21H7DCCMG-∆ | EHA21H7DCCMG-∆ |
| 1350 | 1/16 | .095 | EH21J7DCCMG-∆ | EHA21J7DCCMG-∆ |
| 450 | 3/32 | .156 | EH21K7DCCMG-∆ | EHA21K7DCCMG-∆ |
Seal Material: Replace ∆ with desired code - Blank = Nitrile (Buna) S = Low Temp Buna. N = FKM* E = Neoprene A = EPDM
* FKM seals not recommended for pressure above 500 psi
Ordering Information:
When ordering valves or repair packs add voltage and frequency to complete valve number. for examples: valve (EH21JDDCCMG 120/60) repair pack (2KEH21J AC)
Operating Conditions
- Media
- Air and other non-corrosive gasses, water and oil.
- 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
- 10,000 PSI
- Leakage
- Bubble tight for standard valves.
- Filtration
- Down to 60 microns or less is recommended.
Electrical Characteristics
- Coil Voltage
- 12/DC, 24/DC, 48/DC, 125/DC, 120/60-110/50, 240/60, and 24/60.
- Nominal Power
- AC — 7.3 Watts DC — 9.5 Watts
- Coil Construction
- Molded Class F with third wire ground (Std.), Class H or Potted (Opt.)
- Typical Response Time on Air
- 4 - 16 Milliseconds
- Operating Speed
- Up to 600 CPM with gas media
- Duty Cycle
- Continuous
Mechanical Characteristics
- Body
- 300 Series Stainless Steel
- Internal Components
- Stainless Steel. Copper – AC Only.
- Elastomers
- Nitrile (Buna) (Std.). Many other elastomers available.*
- Sealing Pin
- Kel-F (Std.), Delrin®, PEEK
- Orifice Diameter
- See table above.
- Porting
- 1/8" NPT
- Mounting
- Must be mounted within 30° of vertical.
- Housing
- Flame-Proof construction with 1/2″ NPT conduit
- Listings
- North American Valves are UL listed for use in the United States and Canada for Hazardous Locations — Class I, Div 1, Group C and D – Class II, Div 1, Group E, F, and G; Div 2, Groups A, B, C, D, E, F, and G.
- Certification
- IECEx/ATEX – In compliance with IEC 60079-0 & IEC 60079-1, IECEx : Ex db IIB+H2 T4 Gb, ATEX: II 2 G Ex db IIB+H2 T4 Gb
- Life Expectancy
- Millions of cycles, depending on application, lubrication, etc.
- Valve Weight
- 2.38 lbs
- Repair Packs
- See table above.
- Options
- Alternate Sealing Pin Materials and Alternate Elastomers*
Series 20 High Pressure Valves
Cv Flow Formulae
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.
Liquid Flow
Gas Flow P2 > 53% of P1 (subsonic)
Gas Flow P2 < 53% of P1 (sonic)
DISCLAIMER: Gas flow is only an approximation using Cv.
Coming soon.
