Stainless steel mechanical shaft seal (graphite to ceramic)
Noryl impeller (Brass impeller option) (505A with twin impeller)
Noryl (PPO) diffuser
Superior steel or stainless steel shaft
With thermal protector for all single phase motor
Installation and Application
These pumps are self-priming centrifugal pumps, suitable for suction from deep wells, self-priming is achieved using an ejector, housed in the jet body, which can be installed directly on the pump body or more often lowered in a well and connected to the pump body by two pipes. The total delivery produced by the closed centrifugal impeller is sent only partly to the delivery opening, the remaining water is recirculated through the ejector, which is connected to the suction chamber where it generates the necessary vacuum to draw up water from the point where the jet body is immersed. The water from the jet body suction opening mixes in the diffuser with re-circulating water from the pump, thus increasing its pressure at the expense of the re-circulating water, and is drawn into the pump through the suction pipe, when the jet body is directly installed on the pump body, those pumps will works like other normal jet pumps
It is always advisable to install a foot valve or non-return valve on the jet body suction opening, and install a check valve on the pump delivery opening to ensure adequate counter-pressure when working.
Fill the pump and piping between the pump and ejector body before starting up
Those pumps should be installed in a covered area, protected against the weather.