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4. The calculation of the opening and closing torque of the valve After the main structure of the valve and the supporting and sealing structure at both ends of the valve body are determined, the maximum...

The large-diameter telescopic hydraulically controlled slow-closing butterfly valve adopts the integrated form of machinery, hydraulic control, electric control and computer, which can replace gate valves,...

According to the actual operation of the power station, the structural design of the valve stem should be further improved and perfected, the torsional moment that the valve stem can bear should be increased,...

1.4 Tests (1) Finite element simulation tests Through the preliminary analysis of the reasons for the failure of the valve stem of the above-mentioned failures, it is understood that there is a certain...

Abstract: Taking the fracture of the valve stem of a power station as the test object, through the research and analysis of various factors causing the valve stem of the power station to break, the targeted...

5. Static analysis 5.1 Boundary condition setting In the process of static analysis, the inlet and outlet of the gate valve are set as fixed constraints, and the load is applied to the gate valve system...

To study the shock resistance of nuclear-grade electric gate valves, a finite element model of the nuclear-grade electric gate valve under the combined action of design pressure, temperatures and design...

Hardfacing is the process of hardening the surface of wear-resistant parts. In the production and processing of cemented carbide, hardfacing technology is often used. Cemented carbide hardfacing technology...

Safety valve discs are not stable. The valve disc frequently pops or flutters. Frequently popping refers to the fact that after the safety valve gets back on its seats, it will open again after the pressure...

1. What is stainless steel? Stainless steel is a type of steel. Steel refers to steel containing less than 2% of carbon, and steel with a carbon contect of more than 2% is iron. The addition of chromium...

The mechanical traps use the density difference between the condensed water and the steam, and through the change of the condensed water level, the float lifts and drives the disc of the valve to...

Opening and closing over set pressure means that the equipment is opened or closed over its set pressure. In this case, the overload protection function of the safety valve loses, and the reasons...