Valves & Actuation
![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 Compact Series: Manually Actuated - PVC \ EPDM](/sites/default/files/styles/list/public/images/product/21c9855bf8827e92ce8b9c846fc2/2122_2.jpg?itok=7Tl8UbbC)
This heavy-bodied, quarter-turn shut-off valve is popular where maintenance-free installations are desired for a variety of chemical, industrial and OEM applications. Factory adjusted sealed units are available in IPS sizes 1/2" through 6", with choice of either socket or threaded end connectors. Spears PTFE floating seat design reduces seat wear for extended valve life, smooth operation, bubble-tight shutoff. 100% factory tested. Safe-T-Shear® Stem to help prevent leaks out in the event of stem damage. 235 psi @ 73°F (for complete size range).
![Spears Compact Series: Manually Actuated - PVC \ FKM](/sites/default/files/styles/list/public/images/product/21c9855bf8827e92ce8b9c846fc2/2122_3.jpg?itok=bVo6Dz4T)
This heavy-bodied, quarter-turn shut-off valve is popular where maintenance-free installations are desired for a variety of chemical, industrial and OEM applications. Factory adjusted sealed units are available in IPS sizes 1/2" through 6", with choice of either socket or threaded end connectors. Spears PTFE floating seat design reduces seat wear for extended valve life, smooth operation, bubble-tight shutoff. 100% factory tested. Safe-T-Shear® Stem to help prevent leaks out in the event of stem damage. 235 psi @ 73°F (for complete size range).
![Spears Manual Butterfly Valves: Manual with Lever - PVC \ EPDM](/sites/default/files/styles/list/public/images/product/64716eab898dd4ec618a7b29d37d/722Lever_1.jpg?itok=T8qH_8cu)
Spear’s innovative design departs from traditional liner-seat type valves to eliminate seat creep, reduce operating torque and provide positive seal off. Ideally suited for flow control or throttling, this high performance valve is offered with a full variety of options for greater application versatility. Pressure rated to a maximum internal pressure of 150 psi at 73°F - including dead end service. Heavy blow-out proof 316 stainless steel stem is standard on all valves. PTFE-coated Stainless steel or titanium stems are available on request.