WW-736 Sigma EN ES Differential Pressure Sustaining valve


  • Fully approved AS5081 / AS4020
  • Double chambered design for ultimate flexibility in safety and design
  • Y pattern extremely high flow capacity and cavitation resistance
  • Multiple throttling plugs for low flow and cavitation free operation
  • Quiet operation and fully in line serviceable


Hydraulically operated, differential pressure-sustaining control valve that sustains minimum pre-set differential pressure between two local or remote points, regardless of fluctuating flow or varying upstream pressure BERMAD 700 SIGMA EN/ES series valves are hydraulic, oblique pattern, globe valves with a raised seat assembly and double chamber unitized actuator, that can be disassembled from the body as a separate integral unit. The valves hydrodynamic body is designed for unobstructed flow path and provides excellent and highly effective modulation capacity for high differential pressure applications. The valves are available in the standard configuration or with an Independent Check Feature code “2S”. The 700 SIGMA EN/ES Valves operate under difficult operation conditions with minimal cavitation and noise. They meet size and dimensions requirements of various standards.

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