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Hayward® Y check valves

Hayward's Y check valves are available in ½" to 4" sizes in PVC, CPVC and PVDF

 

 

Hayward PVC Y check valve Hayward Y check valve cutaway picture Hayward true union Y check valves

 

Y check valve design (components)Y check valves are an improved version of a spring loaded check valve and enable inspection and replacement of valve components without needed to remove the valve body from the system.  This is especially important for glued socket connections but equally convenient for check valves having true union connections.

 

Our Y check valves are constructed entirely of non-alloy materials with the body, piston and spring made of either PVC or CPVC and the o-ring seal either EPDM or FPM.  As with all non-alloy valves, Y check valves are only designed for liquid applications and NOT air or gases.  Non-liquids have a substantial amount of stored energy even at low pressures and thus failure of the valve body could result in an explosion of PVC, CPVC or PVDF shards.

 

These can be used in either horizontal or vertical piping as long as the capped spring chamber is facing upwards and you'll note the cracking pressure is slightly higher than the 1.5 PSI cracking pressure for ball check valves.  Even though there is an internal spring to ensure positive seating of the plunger to the seat, at least 2 PSI of back pressure is required to ensure a good seal.  The full flow design results in a minimal differential pressure.

 

The PVC and CPVC Y check valves have either a socket, threaded or ANSI flanged inlet and outlet connection.  The PVDF version is offered in 1/2", 3/4" and 1" size with either IPS socket fusion or FNPT (threaded) connections.  Since PVC and CPVC Y check valves are not suitable for temperatures below 34F, PVDF is used for both liquids not compatible with PVC/CPVC  as well as temperatures as low as 10F.

 

The PVC and CPVC Y check valves can also be provided with true-union connections; this enables removal of the valve body without disconnecting the the pipe connections from the piping. Although the components of a Y check valve can be removed and replaced without disturbing the piping, the body of the Y check valve can only be removed by disconnecting it from the piping if it is not a true-union design.  It may not be too difficult to remove a flanged body form a pipeline, but if the body has threaded or socket (glued) connections then it becomes significantly more difficult to remove the body in the event it is damaged.  A true-union style Y check valve costs about 15% more than the standard version.

 

Hayward threaded PVC SLC spring loaded Y check valve Hayward SLC spring loaded Y check valve

Adjustable Y Check Valves

We also offer a PVC Y check valve which enables you to adjust the cracking pressure between 2 and 15 PSI.  These Y check valves are available with either standard threaded connections or true-union design with threaded or socket (glue) connections

 

Y check valve temperature vs pressure chart

FEATURES