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    5 Products

    Vacuum Breakers

    Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
    Straight
    Image of Product. Front orientation. Vacuum Breakers. Vacuum Breakers, Straight.
    Straights are often used with steam coils, heat exchangers, and space heaters.
    303 Stainless Steel Body—303 stainless steel valves have the best corrosion resistance.
    303 Stainless
    Steel Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Seal
    Material
    For Use With
    Each
    NPT Male Inlet × NPT Female Outlet
    1/2
    		3/8
    		300 psi @ 70° F-20 to 3651 3/4"EPM RubberAir, Argon, Helium, Krypton, Neon, Steam, Water, Xenon4817K240000000
    3/4
    		1/2
    		300 psi @ 70° F-20 to 3652 1/8"EPM RubberAir, Argon, Helium, Krypton, Neon, Steam, Water, Xenon4817K25000000
    1
    		3/4
    		300 psi @ 70° F-20 to 3652 3/8"EPM RubberAir, Argon, Helium, Krypton, Neon, Steam, Water, Xenon4817K26000000
     

    High-Pressure Vacuum Breakers

    Image of Product. Front orientation. High-Pressure Vacuum Breakers.
    Rated for 12 times the pressure of standard vacuum-breaking valves, these can handle up to 1,500 psi. Also known as vacuum-breaking valves, they have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping. Body is 316 stainless steel for excellent corrosion resistance.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    316 Stainless Steel Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    End-to-End
    Lg.
    Specs. Met
    Seal Material
    For Use With
    Temp. Range,
    ° F
    Each
    NPT Female Inlet × NPT Male Outlet
    1/2
    		3/4
    		4.61,500 psi @ 70° F1 5/16"ASME B1.20.1Fluoroelastomer
    		Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon-10 to 4008537T740000000
    3/4
    		1
    		6.61,500 psi @ 70° F1 7/8"ASME B1.20.1Fluoroelastomer
    		Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon-10 to 4008537T76000000
     
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