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FIG 158B

Back Pressure Valve - Vertical

Single poppet one way check valve used to maintain product flow in one direction. Heavy spring for back pressure applications.

NOTE: Opening pressure settings are approximate.

Product Features

Standard Features

Metal-to-metal seats

Thermal expansion available (25 or 50 PSI approximate)

5 to 7 PSI spring settings


Construction Details

  • Body: Brass
  • Cap: Brass
  • Plunger: Brass
  • Spring: Stainless steel
  • Expansion valve: Brass with FKM

Product Ordering Instructions

Figure Suffix Size Description Weight (lbs)
158B 0300 AV .75” Back Pressure Valve-Vertical Type 1.25
158B 0400 AV 1” Back Pressure Valve-Vertical Type 1.75
158B 0600 AV 2” Back Pressure Valve-Vertical Type 5.75
158B 0800 AV 3” Back Pressure Valve-Vertical Type 15
158B 1500 AV 2” Back Pressure Valve-Vertical Type w/25 PSI ER 5.75
158B 1600 AV 3” Back Pressure Valve-Vertical Type w/25 PSI ER 15
158B 2000 AV 3” Back Pressure Valve-Vertical Type w/50 PSI ER 15
158B 2400 AV 1” Back Pressure Valve-Vertical Type w/25 PSI ER 1.75
158B 3400 AV 1” Back Pressure Valve-Vertical Type w/50 PSI ER 1.75
158B 3600 AV 2” Back Pressure Valve-Vertical Type w/50 PSI ER 5.75

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