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VACUUM SWITCHES Vacuum switches are installed on the inlet line to the pump. They are composed of two parts, the diaphragm, which responds to changes in system pressure, expanding toward its system side when pressure in the system falls below outside or atmospheric pressure, and the electrical switch which is held open by spring tension when there is no pressure differential and the diaphragm is in its normal position. When the pump draws water into the system, the suction causes pressure on the inlet side of the pump to decrease, the diaphragm falls and the vacuum switch contacts close, completing the circuit to the burner system. When flow ceases, the diaphragm rises and a spring helps return the switch to the open position. With the switch open, the circuit to the burner system is broken, the solenoid valve closes, and fuel flow to the burner ceases, stopping burner firing. NOTE: A potential problem with a vac switch can be created when the inlet filter or float tank becomes clogged. The pump will continue to run, creating a pressure drop on the inlet. When this happens, the vac switch will continue to close and start the burner. This switch should be used on electric pressure washers with flow up to 3 GPM Equivalent to 0001 vac switch Ports: 1/4" FPT Maximum Tempeature: 140 Degrees Maximum Weight: 1.2 lbs

MODEL 35 VACUUM SWITCHES Designed to protect electric motor driven pumps that are being used to move liquids. Install in the suction line of the system. The double pole electrical contacts are wired in series with the driving motor. When liquid is being pumped, the vacuum that exists in the suction side of the system holds the switch contacts closed. When the liquid supply is exhausted, the vacuum is broken and the contacts open, thus stopping the motor and protecting the pumps from dry operation. When the liquid supply is replenished, the motor is started by holding down the switch restart button momentarily. Use pipe or reinforced wall suction hose on the suction side of the pump. A kinked or collapsed hose will not allow the switch to properly protect the pump. Likewise, if the end of the hose is able to suck up against the side or bottom of the tank, the switch will not protect the pump. If a strainer is used, make sure it si kept clean for proper switch protection. Underwriters Laboratories Registered Switch is not explosion proof Minimum suction height 21" Vacuum required 1 to 1-1/2" Hg Should be installed on pressure washers less than 3 GPM Ports: 1/4" FPT Maximum Temperature: 140 Degrees F. Weight: 1.2 lbs.

MODEL 35 SWITCHES
MODEL	BUY HERE
35.2 1.5" HG	Part# 2362 Sorry This Item is No Longer Available
35.7 2.5" HG	Part# 2363 Sorry This Item is No Longer Available
35.X 4.5" HG	Part# 2364 Sorry This Item is No Longer Available

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