The direct sealing diaphragm valves were introduced to the world market for the first time by DOROT CONTROL VALVES in1982. This valve is operated by the pressure of the pipeline and is used for various control applications in water supply, fire protection, industrial, sewage and irrigation systems.
The only moving component is a reinforced diaphragm, which:
- Drip tight seals the liquid passage in the closed valve
- Allows free passage in the fully open valve with minimal obstruction to the flow line
- Throttles the flow passage in the modulating valve, as dictated by the pressure in the control chamber