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Valve use and maintenance

2021-09-15


1. Use and maintenance of electric regulating valve
 
With the rapid development of my country's industry, the electric control valves produced by Shanghai Yiling are more and more widely used in metallurgy, petrochemical and other fields, and their stability and reliability are becoming more and more important. Will directly affect the automatic control process, this article will elaborate on the use and maintenance of the electric control valve. For the newly designed and installed control system, in order to ensure that the regulating valve can work normally when starting up and make the system operate safely, before installing the new valve, check whether the nameplate on the valve conforms to the design requirements. The following items should also be debugged. Basic error limit; full stroke deviation; hysteresis; dead zone; leakage (in the case of strict requirements). If the control valve in the original system is overhauled, in addition to checking the above items, the sealing of the stuffing box and joints of the old valve should also be checked. out of the law

2. Blue seal and leak seal treatment method
 
There are many factors that affect flange sealing. Mainly include: bolt preload; sealing surface type; gasket performance; flange stiffness; operating conditions. For decades, ANSI flanges designed by the American National Standards Institute have provided the oil and gas industry with a suitable sealing technology, with great success. But as the needs of the oil and gas industry have changed, the deficiencies of ANSI flanges continue to be exposed. The principle of cost-effectiveness, environmental protection and the assurance of optimal health and safety are what operators and contractors face in the 21st century