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Level and Flow Control Valve WW-757-66-U
The Model 757-66-U Level and Flow Control Valve with Bi-Level Vertical Float is a hydraulically operated, diaphragm actuated control valve that controls reservoir filling. The valve hydraulically opens at pre-set low level and shuts off at pre-set high level. During filling, it limits the flow to preset maximum, regardless of fluctuating upstream pressure or reservoir level.
- Line pressure driven – Independent operation
- Bi-Level hydraulic float control
- On/Off service
- Low cavitation damage
- Reservoir inherent refreshing
- Hydraulic flow sensor (downstream installation)
- No moving parts
- No electronic components
- Wide flow setting range
- Cavitation damage protection
- Double chamber design
- Moderated valve reaction
- Protected diaphragm
- External installation
- Easy access to valve and float
- Easy level setting
- In-line serviceable – Easy maintenance
- Flexible design – Easy addition of features
Typical Applications
Gravity Fed Lines
Alternative solutions to accommodate the obvious pressure reducing requirements associated with high elevation differential pipelines are:
- Pressure-reducing valves in series (see BERMAD’s publication: Proportional Pressure Reducing Valve, Model 720-PD)
- Sequential pressure breaking reservoirs
Where pressure breaking reservoirs already exist or are specified, some issues to consider are:
- Pipeline problems associated with line emptying and filling
- Valve cavitation damage
- Reservoir high pressure flow jets
The Model 757-66-U is well suited to provide the solutions to these issues.
