Title:
TERMINAL PRESSURE CONSTANT CONTROL DEVICE OF WATER FEED SYSTEM FOR WATER SERVICE
Document Type and Number:
Japanese Patent JP3167004
Kind Code:
B2
Abstract:
PURPOSE: To control water feed pipe terminal pressure to a constant pressure correctly, in a water feed system which is directly connected to an aqueduct main pipe.
CONSTITUTION: A water feed system is provided with a water service distributing pipe 1, a water service branch pipe 2, a gate valve 3, 10, a reverse flow preventing valve 4 for preventing contamination, a pump 5, the pressure sensor 7 of a suction side, a flow switch 8, a check valve 9 whose pressure is accumulated in a pressure tank 13 (air is held inside), a water feed pipe 11, a pressure sensor for transferring a signal according to pressure of the water feed pipe 11, and a control device (CTL) 14 which is formed in such constitution that terminal pressure is controlled to a constant level, water of water feed pipe is pressurized so as to feed water to a demand side.
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Inventors:
Koichi Sato
Application Number:
JP4399095A
Publication Date:
May 14, 2001
Filing Date:
March 03, 1995
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F04D15/00; (IPC1-7): F04D15/00
Domestic Patent References:
| JP60142097A | ||||
| JP2286888A | ||||
| JP6157193U |
Attorney, Agent or Firm:
Masami Akimoto