Xylem Flojet R7300142 Pentaflex Diaphragm Pump

FLOJET 7000 Series pumps are designed for a wide range of applications and are constructed from a selection of materials suitable for handling a broad range of chemicals. The 5 chamber high flow pumps are self-priming and can run dry without harm. They are intended for intermittent duty cycles but can be run continuously for short periods of time. The higher the duty cycle, the shorter the expected life of the pump. Typical uses include transfer, delivery, spraying, cooling, filtration, dispensing, and pressure boosting.

To start and prime the pump, the discharge line must be opened to allow trapped air to escape, thus avoiding the potential of airlock. For demand models, the pressure switch will shut off the pump automatically when the discharge valve is closed and the pressure has risen to the switch OFF set point. The pressure switch will restart the pump when a valve is opened and the discharge line pressure drops to the ON set point of the pressure switch. For bypass models, apply power to the pump, and open the discharge valve to expel air in the line.

The Flojet R7300142A is fitted with a pressure switch and is known as a demand pumps. The pressure switch is preset to shut off the pump motor automatically when a specific pressure is reached, such as in closed discharge conditions. The pressure switch turns the pump motor on automatically as the pressure drops, such as when the discharge is opened. Demand operation is considered an “intermittent duty” application. The maximum intermittent duty cycle is that which will cause the motor to reach its maximum thermal limits. Once the maximum thermal limit is reached, the motor must be allowed to settle to a lower (ideally ambient) temperature, before resuming operation. Running the pump at or near the maximum thermal limit for an extended period of time will shorten the life of the pump and may result in immediate pump failure. Demand pump models feature an integral pressure switch that automatically turns the pump off/on in response to open/closed discharge conditions.

Flojet R7300142A pumps are equipped with an external bypass system are designed to pump at high pressures while at low or high flow rates. Models equipped with bypass only must be turned off/ on manually, or by an independent control device. Models equipped with a bypass only will continue to run until the power is manually turned off. Operation at lower pressures and temperatures, however, will extend overall pump service life.