Valve device for automatic circulation in a waste water pump sta

Details Valve device for automatic circulation in a waste water pump sta Valve device for automatic circulation in a waste water pump sta

1991-08-13

1992-11-10

Bertsch, Richard A.

Pumps

With condition responsive pumped fluid control

Normally open bypass or relief passage closed by increased...

417360, 251 57, F04B 4900, F04B 1700, F16K 3144

Patent

active

051619580

ABSTRACT:
The pressure side of a submersible pump unit is provided with a valve device which during certain periods of operation opens a connection between the submersible pump and the pump station to obtain the necessary circulation of the waste water in the station. The opening and closing of the valve device is effected by a ball which is controlled by the submersible pump pressure.

REFERENCES:
patent: 4052035 (1977-10-01), Keny et al.
patent: 4265268 (1981-05-01), Hetz
patent: 4726742 (1988-02-01), Harbison et al.
patent: 4886426 (1989-12-01), Surinatz
patent: 4925375 (1990-05-01), Carlsson

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