Poppet check valve P-389 series
for light aircraftmale-male

poppet check valve
poppet check valve
poppet check valve
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Characteristics

Type
poppet
Applications
for light aircraft
Body
male-male
DN

Max.: 25.4 mm
(1 in)

Min.: 6.35 mm
(0.25 in)

Description

Absolute Leak-proof Shutoff No Stem Leakage Minimum Pressure D Wherever perfect sealing is required, the proven reliability of Circle Seal précision valves provides the one complété answer — o combination of absolute leakproof sealing when closed and virtually maintenance-free opération. MATERIALS Aluminum. 303 stainless steel NOTE P-389 Sériés valves normally are not stocked and may be subject to minimum run quantily for unusual materials, sizesr or connections. TYPICAL APPLICATIONS On suction side of hydraulic pump to prevent loss of prime or flooding of réservoir tank, also used as vacuum and pressure relief. Air, oïl, or fuel supply line to reservoir tank. TYPE OF VALVE Spring loaded Circle Seal Check Valve with built-in poppet type relief element. PURPOSE To allow trce flow of vapor from Fluoro Chemical Liquid and Air on missile launching systems in one direction, zéro flow in reverse direction except for bleed off of thermal pressure buildup, small spring loaded relief poppet in check valve poppet opens to bleed off excess pressure. OPERATING CHARACTERISTICS Light spring holds check valve normally closed, Circle Seal "0" Ring prevents leakage With thermal près sure buildup. small spring loaded relief poppet in check valve poppet opens to bleed off excess pressure

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