Sump-vented controller mechanism for vacuum sewerage transport s

Details Sump-vented controller mechanism for vacuum sewerage transport s Sump-vented controller mechanism for vacuum sewerage transport s

1995-04-26

1996-11-05

Michalsky, Gerald A.

Fluid handling

Diverse fluid containing pressure systems

Main line flow displaces additive from shunt reservoir

1372361, 137907, E03B 500

Patent

active

055707157

ABSTRACT:
An apparatus for preventing waterlogging of the sensor and controller valves used to regulate operation of the vacuum interface valve in a sump vented vacuum sewerage system. A float valve operates in accordance with the sewage level in a sump pit and communicates atmospheric pressure to the sensor and controller valves while the sewage level is below a predetermined limit, but closes passage of sewage therethrough once the sewage level exceeds the predetermined limit. A pressure-relief valve may also be operatively connected to the float valve that vents excessive hydrostatic pressure buildups in the sump pit to the atmosphere.

REFERENCES:
patent: 3115148 (1963-12-01), Liljendahl
patent: 3730884 (1973-05-01), Burns et al.
patent: 4171853 (1979-10-01), Cleaver et al.
patent: 4179371 (1979-12-01), Foreman et al.
patent: 4373838 (1983-02-01), Foreman et al.
patent: 4691731 (1987-09-01), Grooms et al.
patent: 5078174 (1992-01-01), Grooms et al.
patent: 5082238 (1992-01-01), Grooms et al.

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