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The sealed units used in home applications often have the motor rotor, pump impeller, and support bearings combined and sealed within the water circuit. This avoids one of the principal challenges faced by the larger, two-part pumps: maintaining a water-tight seal at the point where the pump drive shaft enters the pump body.
Inductive pumps are designed for increased efficiency and were intended to reduce energy consumption in an environment that is increasingly demanding energy conservation. Most electric motors are, on average, about 85% efficient as evidenced by the usual stall test that shows a marked increase in current draw when the motor is stopped mechanically.
Initially production was linked to high pressure pumps and pistons characterized by small dimensions and new type materials that led the company to hold 50% of the market in a few years. [5] Since the 90s it has begun to expand the areas of interest by acquiring other companies in the sector of professional cleaning machines and electric motors.
After receiving an operation command, the actuator moves the valve in direction OPEN or CLOSE. When reaching the end position, an automatic switch-off procedure is started. Two fundamentally different switch-off mechanisms can be used. The controls switch off the actuator as soon as the set tripping point has been reached. This is called limit ...
Solenoid valves. A solenoid valve is an electromechanically operated valve.. Solenoid valves differ in the characteristics of the electric current they use, the strength of the magnetic field they generate, the mechanism they use to regulate the fluid, and the type and characteristics of fluid they control.
In either case, the motor is usually connected to the water valve via a mechanical coupling. For electrical zone valves, the motor is often a small shaded-pole synchronous motor combined with a rotary switch that can disconnect the motor at either of the two stopping points ("valve open" or "valve closed"). In this way, applying power to the ...
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