Page 142 - Peter Paul 2019 Catalog

HAZARDOUS LOCATION HIGH PRESSURE VALVES
Series 20 >> Model EH21
Hazardous Location High Pressure — 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.
• Precision stainless steel rocker arm.
• Kel-F pin sealing element.
• Orifice guides the sealing pin for near perfect alignment.
DE-ENERGIZED
DE-ENERGIZED DE-ENERGIZED
OUT
OUT
ENERGIZED ENERGIZED
ENERGIZED
OUT OUT
IN
Note: This valve also available as an operator. Refer to following page.
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 on proceeding page. Burst Pressure: 5,000 PSI
Leakage: Bubble tight for standard valves.
ELECTRICAL CHARACTERISTICS
Coil Voltage: 6 to 825V AC 60 HZ. and 5 to 720V AC 50 HZ. — 1.8 to 265V DC
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
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 on proceeding page.
Porting: 1/8′′ NPT
Housing: Flame-Proof construction with 1/2′′ NPT conduit
Mounting: Must be mounted within 30° of vertical.
IN IN
IN
IN
IN IN
OUT
O
UT
OUT
Listings: Valves are UL listed and CSA certified 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 Kits: See table on proceeding page.
Options: Alternate Sealing Pin Materials and Alternate Elastomers*
* Consult representative or factory for options and specifications.
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