Check Valves

Asahi/America Swing Check Valves are self-contained, automatic valves which are used to prevent the reversal of flow in a pipeline. When open and under flow pressure, the checking mechanism will move freely in the media, offering very little resistance and minimal pressure drop. Asahi/America Swing Check Valves utilize a swinging disc which requires only minimal back pressure to close the valve. This valve can be modified, with lever and weight or spring, to assist in seating faster, and to eliminate shock.

Features -  • Minimum resistance to flow     • May be installed either vertically or horizontally     • Excellent flow characteristics   • Disc seats tightly with minimum back pressure     • Seat materials - EPDM, FKM or PTFE     • All sizes rated for full vacuum service   • PVC valves up to 3” rated for 150 psi @ 80°F, 4" to 6" sizes rated for 100 psi and 8" size rated for 75 psi.

Swing Check Options
• External lever and weight to assist disc in closing quickly     • External spring to assist disc in closing

Twice the Temperature / Pressure Rating
Hayward Swing Check Valves have up to twice the temperature/pressure rating of other plastic swing check valves and can often replace metal valves
in many applications.
Built-In O-Ring Flange Seals
Hayward Swing Check Valves are furnished ready for installation with two built-in o-ring flange seals. There is no need to purchase additional, expensive
flange gaskets.
Self-Aligning Clapper Seal
Bubble-tight checking, with a minimum of only 3 psi back pressure, is assured with Hayward’s rugged, self-aligning clapper seal design.

Features
• 225 psi @ 70°F (3" and 4")     • Flanged Connections     • Two Drain Ports     • Viton® or EPDM Seals
• Horizontal or Vertical Mount     • No Flange Gaskets Required     • Reversible  Seats

Options
• Counterweight for Closing Assistance     • Limit switch for Position Indication     • Spring Assist Closure 

Design Features
This multi-purpose check valve provides an extremely low profile and very quick response to back flow without slamming. The special design requires no more space then a piece of pipe, and incorporates a flexible elastomer seal for long life, and is suitable for mounting in any position for greater versatility.
Technical Information
2" through 8" sizes are rated for 150 psi @ 73°F, 10" and 12" sizes are rated for 100 psi @ 73°F. As a general guideline, opening and closing pressures will range from .2 to .5 psi for horizontal applications. Opening pressures tend to decrease in large size valves. Valves installed in vertical up-flow applications will require slightly higher pressures.
Features
• PVC or CPVC construction - no metal components     • Quick response shut-off in any position     • Field replaceable Flex-Seal - EPDM or Viton®
• Assembled with silicon-free, water soluble lubricants     • Available with either spigot, flanged, grooved pipe or male threaded ends
• Sizes now available to 24" pipe size - call for information