Method and device for automatic circulation in a waste water pum

Details Method and device for automatic circulation in a waste water pum Method and device for automatic circulation in a waste water pum

1989-11-29

1990-08-14

Smith, Leonard E.

Pumps

With condition responsive pumped fluid control

417430, 415146, 137514, F04B 4902

Patent

active

049483420

ABSTRACT:
The pressure side of the pump unit is provided with a valve (6) which during certain periods opens a connection between the pump and the pump station to obtain circulation in the station. The valve (6) is opened and closed by a valve ball (9) which is controlled by the pump pressure.

REFERENCES:
patent: 3316843 (1967-05-01), Vaughan
patent: 3714964 (1973-02-01), Livingston
patent: 4462766 (1984-07-01), Carlsson et al.

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