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W40 Gauge Valves

Wellmark W40 low-pressure gauge valves are intended for use with 5/8″ tubular gauge glass.

  • Equipped with stainless steel ball check upstream of the seat to shut off flow in case of glass breakage
  • Available in carbon and stainless steel
  • Viton® Glass Seal
  • Soft seat design for tight shutoff
  • 600 psi rating at 100°F
  • Maximum temperature 400°F non-steam applications or 340°F for steam applications
  • Materials meet NACE MR0175 specifications

Sight Glass Tube Connection: 5/8″
Tank Connection: 1/2″ NPT