18R3 Series Master Valve

18R3 Series Master Valve

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The 18R3 series is a direct replacement for the 18R2 series.  

Design Specifications:

  • Valve type - O-ring seal valve
  • Low torque operating design
  • Pressure Rating - Valve body pressure rating 6000 psi
  •  Cv Factor - 3.05

Material Specifications:

  • Brass valve body
  • Brass seat plug available with Kel-F or Vespel soft seat
  • Brass stem
  • Brass bonnet
  • Low temperature Fluorocarbon seal w/ Peek back-up rings
  • Peek thrust washer
  • Teflon coated stainless steel seal ring

 

Additional Information (Select to download Product PDF Details):

https://westernvalveinc.com/wp-content/uploads/2026/07/18R3E-Sheet1-3.pdf

Rebuild Soft Goods Kit for 18R3 Series Valve w/Kel-F Seat

P/N: 18R3-SG-KIT

 

Rebuild Soft Goods Kit for 18R3 Series Valve w/Vespel Seat

P/N: 18R3-SGV-KIT

Rebuild Kit for 18R3 Series Valve w/ Kel-F Seat

P/N: 18R3-KIT

Rebuild Kit for 18R3 Series Valve w/ Vespel Seat

P/N: 18R3V-KIT

Master Valve Stem

P/N: 18R3-2

Replacement and Repair Parts

Master Valve Bonnet Assy. w/Rod T-Seal & Thrust Washer

P/N: 18R2-3A

Master Valve Seat Plug w/Kel-F Seat

P/N: 180-55K

Master Valve Seat Plug w/Vespel Seat

P/N: 180-55V

Master Valve Seal Ring

P/N: 18R2-6

Master Valve Thurst Washer

P/N: 18R3-14

Master Valve Handle

P/N: 180-5

Handlewheel / Handle Spring

P/N: 306-11

Valve Handwheel Nut

P/N: 306-17