The electric valve is simply to use the electric actuator to control the valve, so that the valve can be opened and closed. It can be divided into two parts, the upper part of the electric actuator, the lower part of the valve. The electric valve is divided into two kinds, one is the angular stroke electric valve: The electric actuator of the angular stroke is used with the valve of the angle stroke to realize the valve 90-degree internal rotation control pipe fluid pass-through; another type of direct stroke electric valve: the direct stroke of the electric actuator with the direct stroke of the valve used to achieve the valve plate up and down action to control the flow of the
It is usually used in equipment with higher degree of automation.
Electric Valve Electric valve operation principle electric valve is usually connected by electric actuator and valve, after installation and commissioning, it becomes electric valve. The electric valve uses the electric energy as the power to connect the electric actuator actuation valve, realizes the valve the switch, the adjustment movement.
So as to achieve the switch or adjust the purpose of the pipe medium.
Specific analysis of electric valve Reporter learned that China's electric valve product market with the continuous development of science and technology, but also to high-tech content, high parameters, strong corrosion resistance, high life direction.
Based on the analysis of electric valve technology at home and abroad and the market demand of electric valves at home and abroad, this paper studies the development trend and investment direction of industrial electric valve and electric valve industry in recent years, as follows:
1. Oil, natural gas long-distance pipeline valve
Oil, natural gas long-distance pipeline valves are mainly in line with the United States API6D standard single or double gate, with a diversion hole or a flat gate valve without diversion hole; forged or cast steel triple, mounted or fully welded fixed ball valve, oil seal or pressure balanced plug valve, swing or butterfly check valve, pass ball check valve, pigging valve, etc.
2. Oil, natural gas wellhead equipment valve Oil, natural gas wellhead equipment valves are mainly in line with the United States API6A standard single or double gate, forged steel parallel gate valve with guide hole or no guide hole, mud valve, angular throttle valve, oil field special parallel control valve, oil field special straight check valve, injection/polymer parallel gate valve, clamp type parallel gate valve,
Pilot type relief valve and check valve.
3. Nuclear power valve Electric valves for nuclear power stations have higher technical characteristics and requirements than conventional electric valves for large thermal power plants. Valves generally have gate valves, globe valves, check valves, butterfly valve, safety valve, main steam isolation valve, ball valve, diaphragm valve, valve and control valve, the highest technical parameters of the representative electric valves are: maximum caliber dn1200mm (core 3 butterfly valve), dn800mm (Core 2 primary steam isolation valve), dn350mm (core 1 primary loop gate valve); maximum pressure: about 1500 lb. maximum temperature: about 350 ℃; Medium: Coolant (boron-water).