3040 Series Relief & Back Pressure Valve

Brand: Watson McDaniel

The 3040 Series Back Pressure Valves relieve upstream pressure in a variety of processes. Automatically maintains desired maximum pressure in a vessel or system by relieving excess pressure into lower pressure return line or to atmosphere.

Ideally suited for use as pump bypass control valve by maintaining constant pump discharge pressures. Used as a continuously operating valve or for intermittent protection against over-pressure conditions.
Features
  • Fast response
  • Viton Trim for 148.9° C (300˚ F) service
  • Soft "Seat" for tight shut-off

Specifications

Enclosure, Body Material

  • 1/2” to 1-1/2” NPT: Stainless Steel
  • 1/2” to 1-1/2”: Bronze Diaphragm Chamber
  • 2” NPT, 2” Flange: Cast Iron

Flange Size - 2” (DN 50)

  • 2” (DN 50) - 125#

Media

  • Air
  • Oil

NPT Connection

  • 1” NPT
  • 1/2” NPT
  • 1-1/2” NPT
  • 1-1/4” NPT
  • 2” NPT
  • 3/4” NPT

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