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Wafer check valve (courtesy of Duo-Chek) |
A wafer check is designed to be "sandwiched" inline between two pipe flanges in the piping system, adding very little additional weight or bulk to the piping layout. Wafer checks overall tend to be stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves and are easier to install between standard gasket and line flanges.
Along with being lighter, easier to install and store, wafer check valves also offer the following advantages:
- Disc travel is short with less impact force caused by valve closing.
- The disc closes quickly with less water hammer pressure. Water hammer pressure is only 1/2 to 1/5 times of flange type swing check valve and flange type lift check valve.
- Low flow resistance.
- Horizontal and vertical installation available.
- Very low opening (cracking) pressure differential.
- More reliable due to lower impact forces, less water hammer.