Hydraulically operated, active check, pump control & pressure sustaining valve
with two independent functions: It opens fully or shuts off in response to
electric signals, isolating the pump from the system during pump startup and
shutdown, thereby preventing pipeline surges.While open, it sustains minimum
pump discharge pressure regardless of fluctuating flow, and prevents the pump
from exceeding its designed flow or power consumption.
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

Iֺndependent check feature – 743-2S
Dֺifferential pressure sustaining – 743-06
3ֺ-Way control – 743-X
Fֺlow control – 747-U
Pֺressure reducing – 742
Pֺump circulation control – 745
Eֺlectronic control – 740-18
Pֺressure sustaining and Pressure reducing – 743-2Q
See relevant BERMAD publications.

English WW 743 SIGMA Product Page
English WW 700 SIGMA Engineering
English WW 700 SIGMA Ordering Guide