Bermad WW750-66-B Level Control Valve



WW750-66-B – Level Control Valve with Bi-Level Vertical Float AS5081

The Model 750-66-B Level Control Valve with Bi-Level Vertical Float is a hydraulically controlled, diaphragm actuated, double chambered control valve. The valve is hydraulically powered to fully open at pre-set reservoir low level, and to shut off at pre-set high level regardless of valve differential pressure.

Model 750-66-B is the first valve of its design in Australia to be compliant and certified for inclusion in water supply for municipal water and building services.

  • Reservoir filling
    • Very low supply pressure
    • Low noise generation
    • Energy cost critical systems
    • Systems with poor water quality
  • Reservoir outlet
    • Distribution routing
    • Sewerage "fill and flush" systems


  • Line pressure driven - Independent operation
  • Bi - level altitude pilot
    • On/Off service
    • Suitable for low quality water
    • Reservoir inherent refreshing
    • Low cavitation
  • Double chamber design
    • Full powered opening and closing
    • Decreased pressure loss
    • No throttling noise
    • Non-slam closing characteristics
    • Protected diaphragm
  • External installation
    • Easy access to valve
    • Easy level setting
    • Less wear and tear
  • Balanced seal disk - High flow capacity
  • In-line serviceable - Easy maintenance
  • Flexible design - Easy addition of features

Major Additional Features

  • Pressure sustaining - 753 - 66
  • Electric float backup - 750 - 66 - 65
  • Flow control - 757 - 66 0 U
  • Closing surge prevention - 750 - 66 - 49
  • Level sustaining - 75A - 66



The Model 750-66-B is a float controlled valve equipped with a 4-Way, "last position", bi-level float pilot assembly. The float slides along the rod. When the float reaches either the adjustable high or low level stoppers, it either pulls the rod assembly down or pushes it up, switching the float pilot position. When the float is between the adjustable stoppers, the main valve remains in its last position.

At high level, the float pilot applies pressure to the upper control chamber, and vents the lower control-chamber, powerfully shutting off the main valve.

At low level, the float pilot applies pressure to the lower control chamber, and vents the upper control chamber, powerfully opening the main valve.

For 10" vales and larger, two accelerator quicken valve response.


WW750-66-B – Level Control Valve Brochure WW750-66-B – Level Control Valve Brochure