ASCO F321 Series Air-Operated Valves

Brand: ASCO

ASCO F321 Series valves are designed to provide long service life handling lubricated air. Their unique sealing members isolate pilot air pressure from mainline fluid. Variations in pilot air pressure will not affect the valves operation.
  • Normally-closed, brass body construction with NBR seating.
  • Accepts 1/4-inch and 3/8-inch pipe sizes.
  • Handles fluids up to 200° F (92° C).
  • Mountable in any position for flexible installation.



Body Material

  • Brass


  • From 0.5 Cv to 1.0 Cv


  • 3-Way - 3/2 Normally Closed

Maximum Differential, Maximum Operating Pressure

  • Vacuum to 150 psig


  • Air, Inert Gas, Light Oil, Water

Operating Environment

  • Indoor, Outdoor

Pipe / Port Size

  • 1/4, 3/8

Port Type

  • Female NPT

Valve Actuation

  • Pneumatic - Air Pilot
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