Model 790-M

Model 790-M - Burst Control Valve

WW_790-M_Big_GalleryThe Model 790-M Burst Control Valve is a hydraulically operated, diaphragm actuated control valve that upon sensing flow in excess of setting shuts off and locks drip tight, until it is manually reset. As long as flow is lower than the setting, the valve remains fully open, minimizing head loss.

Features and Benefits

  • Line pressure driven – Independent operation
  • Mechanical flow stem
    • Field adjustable
    • No moving parts
    • No electronic components
  • Highly sensitive hydraulic pilot
    • Requires minimal valve-ΔP
    • Tight setting window
  • In-line serviceable – Easy maintenance
    • Double chamber
    • Moderated valve reaction
    • Protected diaphragm
  • No spring - Full opening
  • Flexible design – Easy addition of features
  • “Y” or angle, wide body – Minimized pressure loss
  • Obstacle free, full bore – Uncompromising reliability


Typical Applications

Burst Control Valves in a Network

Every water system is vulnerable to bursts, whether due to system problems or external mechanical damage. This illustration shows a reservoir feeding a downhill line with lower elevation consumers. In case of burst, each Model 790-M protects against flooding lower elevation consumers. The Model 790-M, installed at the reservoir outlet, also protects against reservoir emptying.