The RAF 1031 is a Normally Closed (N.C) electric float control valve, activated by line pressure.
The electric circuit is switched by a float hanging over the water surface at the desired height.
When the water level drops below the float, the electric circuit is switched on and opens the valve through a solenoid valve. As the rising water reaches the maximum level, the solenoid is de-energized and the RAF 1031 closes.
The RAF 1031 is a non-modulating service valve, operating as an on/off valve.
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