Check Valves
![Spears Ball Check Valves: Automatic - PVC \ EPDM](/sites/default/files/styles/list/public/images/product/92ebda45e6d6fd3e0b9054b4784e/Spears%20Check%20TU2000~3.jpg?itok=g-tYpWpi)
![Butterfly Check Valves: Automatic - PVC \ EPDM](/sites/default/files/styles/list/public/images/product/2306b974194e309685e6bdf94aca/Spears%20Butterfly%20check%20flange.jpg?itok=7iaCPfPP)
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
![Spears Type 1520 Utility Swing Check: Automatic - Clear PVC \ EPDM](/sites/default/files/styles/list/public/images/product/caa27cb5512442de4c929571e0bc/S1520%20Series%201.jpg?itok=QLxZGvC-)
PVC Utility Swing Check Valves are designed for horizontal installations, but may be installed in up-flow vertical position. Check valves must be installed with the valve’s FLOW arrow pointing in the direction of the flow. Flow velocity should not exceed 5 feet per second.
• Pressure Rating - 150 psi @ 73°F   • Maximum Service Temperature - 140°F   • EPDM seal for positive sealing
• Flow velocity < 5 ft./sec.
![Spears Type 1520 Utility Swing Check: Automatic - PVC \ EPDM](/sites/default/files/styles/list/public/images/product/caa27cb5512442de4c929571e0bc/S1520%20Series%202.jpg?itok=OGNvn02t)
PVC Utility Swing Check Valves are designed for horizontal installations, but may be installed in up-flow vertical position. Check valves must be installed with the valve’s FLOW arrow pointing in the direction of the flow. Flow velocity should not exceed 5 feet per second.
• Pressure Rating - 150 psi @ 73°F   • Maximum Service Temperature - 140°F   • EPDM seal for positive sealing
• Flow velocity < 5 ft./sec.