Seaflo 33 & 42 series diaphragm pump start the thermal protection device when the motor temperature reaches 125℃.

Turn on the power supply, open the water switch, the pressure switch senses the water pressure is less than the stop pressure to start the start water pump; turn off the water switch, the pressure switch induction water pressure reaches the stop pressure break circuit, the water pump stop working.

The actual water flow of the waterway is less than the water flow of the water pump. The by-pass switch is started, and part of the water flow circulates internally and releases the pressure, to prevent the pressure switch from starting frequently.