The Model 750-65 Level Control Valve with Bi-Level Electric Float is a hydraulically operated, diaphragm actuated control valve that controls reservoir filling in response to an electric float switch signal, opening at pre-set low level and shutting off at pre-set high level. The double chamber actuated Model 750-65-B is powered to fully open and close even at very low pressure.
The Model 750-65 is a solenoid controlled valve equipped with a bi-level electric float switch* and a solenoid pilot.** The float switch  closes at pre-set low level, energizing the solenoid , and opens at pre-set high level, de-energizing it. Should the level drop, the solenoid is energized, causing the upper control chamber  to vent, opening the main valve. Should the level rise, the solenoid is de-energized, and pressure is applied to the upper control chamber harnessing line pressure to close the main valve.
For 8” (200 mm) valves and larger, an accelerator quickens valve response. For low pressure applications use the Model 750-65-B with double chamber operation.
* Other switching means are available.
** Normally Closed and Normally Open main valves are available.
Body: Brass or Stainless Steel
Elastomers: NBR or FPM
Enclosure: Molded epoxy
Tubing & Fittings: Stainless Steel 316 or Copper & Brass
Accessories: Stainless Steel 316, Bronze, Brass and Synthetic Rubber Elastomers
Max. Current: 16A@250V
Fluid specific weight: 0.95-1.10
Working temperature: Water up to 60˚C (140˚F)
Length – 124 mm (4.9”)
Width – 90 mm (3.5”)
Cable length – 4.9 m (16 ft.)
(ac): 24, 110-120, 220-240, (50-60Hz)
(dc): 12, 24, 110, 220
(ac): 30 VA, inrush; 15 VA (8W), holding or 70 VA, inrush; 40 VA (17.1W), holding (dc): 8-11.6W
Values might vary according to specific solenoid model
Reservoirs vary in their characteristics – location, elevation, filling & emptying, flow & pressure, surface area, etc. These various characteristics require various level control valve solutions. The Model 750-65 is the ideal solution for level control in reservoirs – shallow and deep, low and high elevation, rooftop and basement, in water towers, and wherever electric power is available.
In a reservoir system where a pump provides pressure, consumers are prioritized over reservoir filling by installing the Model 753-65 Level Control and Pressure Sustaining Control Valve.
Where a reservoir provides pressure to consumers and fills a lower elevation reservoir, the consumers should be prioritized over filling the lower reservoir. Defining the pressure set-point for the standard level control and pressure sustaining valve is usually impossible, as there is only a very small potential differential pressure to operate the valve.
The solution: Rather than controlling the pressure during filling, control the filling flow ensuring sufficient pressure for consumers. Install the Model 757-65-U Level and Flow Control Valve.
Size Range: DN40-900 ; 11/2–36”
End Connections (Pressure Ratings): Flanged: ISO PN16, PN25 (ANSI Class 150, 300)
Threaded: BSP or NPT
Others: Available on request
Valve Patterns: “Y” (globe) & angle, globe (DN600-900 ; 24”-36”)
Working Temperature: Water up to 80°C ; 180°F
Body & Actuator: Ductile Iron
Internals: Stainless Steel, Bronze & coated Steel
Diaphragm: Synthetic Rubber Nylon fabric-reinforced
Seals: Synthetic Rubber
Coating: Fusion Bonded Epoxy, RAL 5005 (Blue) approved for drinking water or Electrostatic Polyester Powder