Series 20 Model EH21

2-WAY NORMALLY OPEN

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.

Tabs

Specifications

MAX. OPER.
PRESS. DIFF. LIQUID

ORIFICE SIZE

CV FACTOR

VALVE NUMBER
CONDUIT HOUSING

AC/DC

LIQUID 1/8 NPT

3000

1/32

.024

EH21G7DCCM-∆

1500

3/64

.052

EH21H7DCCML-∆

850

1/16

.095

EH21J7DCCML-∆

300

3/32

.156

EH21K7DCCML-∆

MAX. OPER.
PRESS. DIFF. GAS

ORIFICE SIZE

CV FACTOR

VALVE NUMBER
CONDUIT HOUSING

AC/DC

GAS 1/8 NPT

3000

1/32

.024

EH21G7DCCM-∆

2500

3/64

.052

EH21H7DCCMG-∆

1350

1/16

.095

EH21J7DCCMG-∆

450

3/32

.156

EH21K7DCCMG-∆

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.

Filtration:

Down to 60 microns or less is recommended.

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.

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®, Teflon®, Nylon, PEEK, Radel®, Ultem®, 303 Stainless Steel (Opt.)

Orifice Diameter:

See table above.

Porting:

1/8" NPT

Housing:

Flame-Proof construction with 1/2″ NPT conduit

Mounting:

Must be mounted within 30° of vertical.

Listings:

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.

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*

Drawings

To view files Autodesk Viewer can be found here. https://viewer.autodesk.com/