have flexible diaphragms, or bellows, to isolate operating parts from fluids. Removing metal-to-fluid contact eliminates corrosion, contamination, and clogging in wetted valves.

The diaphragm has a small hole located so that valve inlet ... The focus of the foregoing has been on two-way valves but, of course, other varieties of solenoid valves are available and the same basic ...

A diaphragm isolation valve—also known as a “membrane valve”—is a solenoid-operated device that uses a diaphragm that extends and retracts to seal the valve seat and isolate the flow path.