Hydraulically operated, deep well pump control valve that adds advanced “active
check valve” logic to standard pump systems. The valve branches off the main
line and is synchronized with the pump’s electric control; it opens during pump
startup and shutdown, thereby preventing pipeline surges.It also prevents
startup flow debris (such as sand and pebbles) from penetrating into the system.
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.
Compatible with various standards
Hֺigh quality materials
Iֺn-line serviceable – Easy maintenance

Rֺelief override – 745-3Q
Eֺlectronic control – 745-18
Pֺump circulation and flow control valve – 749-U
Pֺump Circulation and Pressure Sustaining Control Valve – 748
Iֺndependent Check Feature – 745-2S
See relevant BERMAD publication


English WW 745 SIGMA Product Page
English WW 700 SIGMA Ordering Guide