Title:
【発明の名称】真空下水搬送システム用水だめ通気制御機構
Document Type and Number:
Japanese Patent JPH10507502
Kind Code:
A
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.
Inventors:
Feathering Gill, Burton A.
Grooms, John M
Grooms, John M
Application Number:
JP53276196A
Publication Date:
July 21, 1998
Filing Date:
April 26, 1996
Export Citation:
Assignee:
Airvac Incorporated
International Classes:
E03F1/00; E03F5/22; E03F3/02; E03F7/00; (IPC1-7): E03F7/00; E03F3/02
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)