| 摘要 |
#CMT# #/CMT# The method involves inserting a replacement valve into a hydrant in an opened condition by a sewer port and a socket, and moving the replacement valve to a closed condition, where a water supply is closed in the closed condition. The replacement valve is moved to the opened condition and removed from the hydrant by the sewer port and the socket when water pressure is applied at the hydrant. A valve bar (115) with a spindle (113), a main valve (116) and a spindle ball bearing (112) are inserted into the hydrant by the sewer port and the socket when the pressure is applied at the hydrant. #CMT# : #/CMT# An independent claim is also included for a closing device comprising an expansion ring positioned at a valve seat. #CMT#USE : #/CMT# Method for performing inspecting and/or adapting operations at a hydrant i.e. pillar hydrant, that is utilized for supplying water to household and industrial areas. Uses include but are not limited to perform exchanging of a main seal, cleaning of a stand pipe, installing and repairing of functions of a drainage opening and elongating and shortening of a lower part at the hydrant. #CMT#ADVANTAGE : #/CMT# The method performs the inspecting and adapting operations at the hydrant without interrupting the water supply to the hydrant, thus continuously supplying water to the household and industrial areas. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a vertical sectional view of a hydrant. 111 : Valve seat 112 : Spindle ball bearing 113 : Spindle 115 : Valve bar 116 : Main valve. |
