Small Check Valves 1/2” and Smaller
Liquid/Gas Check Valves Cracking pressure .5 PSI/max pressure 150 PSI/vacuum between 2 and 29” HG
Mini Check Valves Cracking pressure 1 PSI/Max pressure 125 PSI/ Not for vacuum
Propylene Check Valve Series 694 Cracking pressure1PSI or less/Max pressure 125 PSI
SMC PVC Check Valves Cracking pressure1 PSI/Max pressure 125 PSI/ Not for vacuum
Check Valves for Vacuum 10" to 28" hg vacuum/does not have a PSI cracking pressure
True Union Ball Check Valves
Hayward ® True Union Ball Check Valve Cracking pressure 1-1/2 PSI/Max pressure 150 PSI
Nibco® Chemtrol True Union Ball Check Valve Seating head 1/2" thru 3/4" 6 - 7 PSI; 1" thru 2" 4 - 5 PSI; 3" size 3 - 4 PSI/Max pressure 150 PSI/ 2 PSI positive back pressure
PVC True Union Ball Check Valve Type 360 3 foot minimum head to seat/Maximum pressure rating of 232 psi at 68°F for solvent cement socket end connectors, and150 psi at 68°F for threaded end connections
Asahi® PVDF Check Valves Minimum shut-off of 5 PSI/Maximum pressure 150 psi at 70° F sizes 1/2" – 2”; 100 psi at 70° F sizes 3” & 4”
Spears® True Union Ball Check Valve ½” - 2” require 1.6 feet of head and 2-1/2” - 4” require 1 foot of head to close/Maximum pressure Sizes 1/2” - 2” pressure rated to 235 psi @ 73°F, sizes 3” - 4” to 150 psi @ 73°F/ Rated for vacuum service
Cepex Ball Check Valves Minimum back pressure 3.75 PSI/Max Pressure for 1/2" - 2" 240 PSI and for 2-1/2" - 4" 150 PSI
Y Check Valves
Hayward ® PVC Y-Check Valve Minimum of 2 PSI of positive back pressure to seat disc/Max pressure 150 PSI
True Union Y- Check Valve Minimum of 2 PSI is required to move disc/Max pressure 150 PSI
Swing Check Valves
Sump Pump Swing Check valve Pressure rating @ 73° F water-full flow open 150 PSI/back pressure closed-75 PSI
Cepex Economy Wafer Check Valve Max pressure 150 PSI/Minimum return pressure required 3 PSI
Hayward ® Heavy Duty Wafer Check Valve Back pressure required dependant on valve installed position and size. Consult us for more details.
Hayward ® Swing Check Valve Max pressure 225 PSI for 3” and 4” and 150 PSI for 6” and 8”/Minimum back pressure to close 3 PSI
Title: Do you have any check valves with a low cracking pressure?
Description: List of pressure ratings for our various check valves.
Last Edited: 9/18/2013
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