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WW 750-66-B

WW 750-66-B
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BERMAD IrrigationLevel Control Valvewith Bi-Level Vertical FloatWW-750-66-B ■ 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 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. Major Additional Features ■ Line pressure driven - Independent operation ■ Bi-level hydraulic float control □ On/Off service □ Low cavitation damage □ Suitable for low quality water □ Inherent reservoir refreshing ■ Double chamber □ Full powered opening and closing □ Decreased pressure loss □ No throttling noise □ Non-slam closing characteristic □ Protected diaphragm ■ External installation □ Easy access to valve and float □ Easy level setting □ Less wear and tear ■ Balanced seal disk - High flow capacity ■ In-line serviceable - Easy maintenance ■ Flexible design - Easy addition of features ■ Pressure sustaining - 753-66 ■ Electric float backup - 750-66-65 ■ Flow control - 757-66-U ■ Closing surge prevention - 750-66-49 ■ Level sustaining - 75A-66 See relevant BERMAD publications.

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Operation The Model 750-66-B is a float controlled valve equipped with a 4-Way, “last position”, bi-level float pilot assembly. The float [1] slides along the rod [2]. When the float reaches either the adjustable high [3] or low [4] level stoppers, it either pulls the rod assembly down or pushes it up, switching the float pilot [5] 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 [6], and vents the lower control-chamber [7], powerfully shutting off the main...

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BERMAD Irrigation WW-700 Series Typical Applications Infrastructure Reservoirs Optimal design of reservoir systems requires specifying a level control valve that reduces pumping costs by minimizing the extra pumping pressure required to operate standard valves. Even at very low pressure, the Model 750-66-B ensures full opening, maximum flow capacity, and secure closing. It should be included during the system design phase or with changing needs. Bi-Level Vertical Float Model 66 Installed in stilling tank Level Control Valve with Bi-Level Vertical Float Model 750-66-B Pumping to Uphill...

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BERMAD Irrigation WW-700 Series WW-750-66-B For full technical details, refer to Engineering Section. Technical Data Flow Chart Data is for Y-pattern, flanged, PN16 valves Weight is for PN16 basic valves “C” enables removing the actuator in one unit “L”, ISO standard lengths available For more dimensions and weights tables, refer to Engineering Section Flow Rate - m3/h Data is for Y-pattern, flat disk valves For more flow charts, refer to Engineering Section Main Valve Control System Valve Patterns: “Y” (globe) & angle Size Range: 11/2–32” (40-800 mm) End Connections (Pressure Ratings):...

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