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Direct Pilot Operated
Normally Closed - Stainless Steel
Air, Oil, Water or Vacuum

       
       

Specifications




ANSI Symbol
Body Stainless Steel (304 for 3/4" and 316 for 1" versions)
Pilot Cap Brass/Nickel Plated
Internal Parts Stainless Steel
Seals Viton-A® (Optional Seals Available)
Temperature Range 0° F to +400° F
Pressure Rating Vacuum-500 PSI
Higher pressure ratings available, consult factory
Pilot Ratio See model number chart below

 

NOTES:

Use -31 suffix for vacuum service

Use -H suffix for liquid pilot media (oil, water, etc.)


Model Numbers
Standard Pilot Ratio

NPT Pipe Size
(inches)
Cv Factor Pilot Ratio* Weight (pounds) Model Number
3/4 5.32 2:1 4.0 337412
1 10.2 4:1 7.0 337416
* Internal Line Pressure vs. Minimum Pilot Pressure

High Pilot Ratio

NPT Pipe Size
(inches)
Cv Factor Pilot Ratio* Weight (pounds) Model Number
3/4 5.32 6:1 4.0 338512
1 8.06 10:1 7.0 338516
* Internal Line Pressure vs. Minimum Pilot Pressure


How to Order Example:

This would be a high pilot ratio, direct pilot operated, normally closed valve with 3/4" NPT ports, "-28" seal option for Teflon® seat with Viton® seals, and a "-H" pilot option for liquid pilot signal.

Note: When ordering, always state:
  1. Model
  2. Seal Option Code or Codes
  3. Pilot Option Code or Codes