Internal breathing for vacuum interface valve of vacuum sewage s

Details Internal breathing for vacuum interface valve of vacuum sewage s Internal breathing for vacuum interface valve of vacuum sewage s

1998-10-01

1999-11-09

Michalsky, Gerald A.

Fluid handling

Diverse fluid containing pressure systems

Main line flow displaces additive from shunt reservoir

1372361, 137907, F04F 300

Patent

active

059794860

ABSTRACT:
An internal breathing system for a vacuum interface valve in a vacuum sewage system uses a vent port arranged in a partition between a remotely vented sump and a valve chamber for the vacuum interface valve located above the sump. A float valve normally opens the vent port to admit approximately atmospheric pressure air from the sump to the valve chamber, and the float valve closes the vent port if a mishap causes sewage to rise high enough to float the valve. Conduits preferably provide breathing communication for the vacuum interface valve and its controller from a region high in the valve chamber to avoid accidental transmission of sewage or condensate.

REFERENCES:
patent: 4691731 (1987-09-01), Grooms et al.
patent: 5069243 (1991-12-01), Foreman
patent: 5570715 (1996-11-01), Featheringill et al.
patent: 5615701 (1997-04-01), Yamabe et al.

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