Morrison Bros 158B-0800 AV 3" Vertical Back Pressure Valve Air Grease Pumps Dynamic seals have double o-ring

Dynamic seals have double o-ring construction for long life and low temperature performance

Fast Flow Siphon: Flow rate of 7 gallons per minute

Excellent resistance to gasoline (up to 20% alcohol and petroleum blends)

Designed for use in vertical piping systems

Morrison Bros 158B-0800 AV 3" Vertical Back Pressure Valve Air Grease Pumps Dynamic seals have double o-ringSingle 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. Standard Features Metal to metal seats 5 to 7 PSI spring settings Construction Details Body: Brass Cap: Brass Plunger: Brass Spring: Stainless steel Expansion valve: Brass with FKM