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Edward Lowton
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Seal-less valves
08 July 2013
Wanner International has introduced a range of heavy duty, seal-less diaphragm bypass valves that are reported to provide accurate, repeatable smooth response without causing 'chatter' in bypass lines.
The Hydra-Cell C62/C63/C64 series comes in a choice of 316 stainless steel, Hastelloy or brass body with PTFE or Viton ‘O’ rings and PTFE diaphragm, making them suitable for use in systems pumping corrosive or dirty liquids. They can be used with any positive displacement pump with flows up to 151 lpm.
The design is simple – a tapered plunger with an attached diaphragm. When excess pressure overcomes the adjustable spring pressure on the plunger, the plunger lifts off the valve seat, allowing fluid to bypass and reduce system pressure.
When a system discharge is completely closed, such as a closed spray gun, closed valve or plugged nozzle, the Hydra-Cell Valve bypasses the total system fluid flow. Due to their immediate response these valves also balance system pressure for multiple-gun operations.
