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Pressure relief/sustaining hydraulically operated control valve that can fulfill either of two separate functions: When installed in-line, it sustains minimum pre-set, upstream (back) pressure regardless of fluctuating flow or varying downstream pressure. When installed as a branched from the line circulation valve it relieves excessive line pressure when above maximum pre-set. 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.

Product Features & Benefits

Dֺesigned to – stand up to the toughest conditions

  • Excellent anti-cavitation properties
  • Wide flow range
  • High stability and accuracy
  • Drip tight sealing

Dֺouble chamber design

  • Moderated valve reaction
  • Protected diaphragm
  • Optional operation in very low pressure
  • Moderated closing curve

Fֺlexible design – Easy addition of features
Oֺbstacle free flow pass
Vֺ-Port Throttling Plug (Optional) – Very stable at low flow
Cֺompatible with various standards
Hֺigh quality materials
Iֺn-line serviceable – Easy maintenance

Typical Product Applications

Pֺressure sustaining and reducing valve – 723
Dֺifferential pressure sustaining – 736
Qֺuick pressure relief valve – 73Q
3ֺ-Way control – 730-X
Sֺolenoid control – 730-55
Hֺydraulic check feature – 730-20
Aֺnti-cavitation cage – 730-C2
Hֺigh sensitivity pilot – 730-12
Eֺlectrically selected multi-level setting – 730-45
Lֺevel control and pressure sustaining valve – 753
Pֺump control and pressure sustaining valve – 743
Sֺee relevant BERMAD publication