Diaphragm valve WW-757-66-U

hydraulichydraulically-operatedfloat

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. PRODUCT FEATURES & BENEFITS 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 PRODUCT APPLICATIONS 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.