Industrial valves
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31D Series Brass 3-way Ball Valves

Standard Port with NPT Connections (1/4" to 3")



The 31D is a 3-way, brass ball valve. It can be equipped with a manual handle or with direct mount pneumatic or electric actuators. The direct mount actuators eliminate the valve-actuator mounting kit, which adds unnecessary height and expense. A full range of accessory items are available including limit switches, solenoid valves, positioners and manual override device.


Flow Plans

These are only the most common flow plans
Show all Possible Flow Plans

Features & Benefits

  • Standard port
  • Blow-out proof stem
  • Live-loaded Pyramidal stem seal design
  • Integrated mounting pad for actuators
  • Compact assembly
  • Complete line of accessories


  • Body & Stem - Brass
  • Ball - Chrome Plated Brass
  • Seats - PTFE
  • Stem Seals - PTFE, with Viton® O-ring, or RPTFE
End Connections
  • NPT Threaded (1/4" to 3")
Temperature Range:
  • -30 to 320°F
Pressure Range:
  • up to 400 PSIG
  • up to 100 WSP

Available Actuators

  • Electric
  • Pneumatic (spring return)
  • Pneumatic (double acting)
  • Manual Handle

Typical Applications

  • Air Drying Equipment
  • Pollution Control Equipment
  • Process Control Applications
  • Laundry Equipment
  • Textile Dyeing & Drying
  • Bottling & Dispensing Equipment
  • Custom Ball Valve Assemblies

Viton® is a trademark of the DuPont Company.

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MPFVIP-EVOXLB250LFWM-PCDM-PSTManual Valves31DG2Butterfly
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