Hydraulically operated off-line surge anticipating valve that immediately opens in
response to the pressure drop associated with abrupt pump stoppage. The preopened
valve dissipates the returning high pressure wave, eliminating the surge.
The valve smoothly closes drip tight as quickly as the relief feature allows, thereby
preventing closing surge. The valve also relieves excessive system 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.

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

Sֺolenoid control – 735-55-M
Qֺuick pressure relief valve – 73Q
Hֺydraulic/Electric override – 735-55-09-M
Iֺndependent Check Feature – 735-M-2S
See relevant BERMAD publication

English WW 735-M SIGMA Product Page
English WW 700 SIGMA Engineering
English WW 700 SIGMA Ordering Guide