This paper describes the key point of gas-oil valve in daily care and maintenance, including the basic structure, operating procedure, cleaning of filter and replacement, inspection of air-tube and test tube, inspection of hydraulic oil of gas-liquid and oil-level,inspection of voltage of battery,also the problems to be focused on in winter operation. The paper lists following common failures of the gas-oil valve,including abnormal under the condition of normal pressure, failure of Lineguard communication function, air leakage at the junction of air-tube and test tube, unable fine off and out of sync signal between field signal and remote signal and. The trouble-shooting methods are given.
The paper describes the necessity of new valves’pre-maintain before operation,introduces preliminary preparation and maintenance steps for the new valves before operation.Valve maintenance is divided into three parts,that is,(1)valve maintenance before installation and welding;(2)inspection and maintenance during pressure testing and(3)maintenance and repair forproblemvalve before putting into operation. Requirements for valve installation and welding are presented.
