Morrison Bros 158B-0800 AV 3" Vertical Back Pressure Valve Air Grease Pumps a Teflon-coated brass packing nut

a Teflon-coated brass packing nut

150 PSI rating given at ambient temperature 70F (21C)

and drums as a gravity flow shut-off valve

Pressure vacuum vents are installed on the top of underground and low volume aboveground storage tank vent pipes

Morrison Bros 158B-0800 AV 3" Vertical Back Pressure Valve Air Grease Pumps a Teflon-coated brass packing nutSingle 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