Control mode of instrument valve

Control mode of instrument valve
The control of instrument valve can adopt various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, pneumatic, spur gear, bevel gear, etc; Under the action of pressure, temperature or other forms of sensing signals, the valve can act according to the predetermined requirements, or simply open or close without depending on the sensing signal. The valve depends on the driving or automatic mechanism to make the lifting, sliding, swinging or rotary movement of the opening and closing parts, so as to change the size of its flow channel area to realize its control function.
In addition to the chemical composition and various mechanical properties, the water pressure, flattening, flaring and other tests, as well as the surface quality and non-destructive inspection are also required for the instrument valve. The instrument pipe and valve parts shall be delivered under the condition of heat treatment. Stainless steel instrument pipe and valve parts: stainless steel instrument pipe and valve parts are hot rolled and cold rolled, which are widely used in petroleum and chemical equipment pipes and stainless steel structural parts for various purposes. In addition to ensuring chemical composition and mechanical properties, all instrument pipe and valve parts used to bear fluid pressure shall be qualified in hydrostatic test. All kinds of special instrument pipes and valves shall be guaranteed according to the specified conditions.
The instrument valve is a kind of pipe fitting that can withstand pressure. The instrument valve is made of seamless instrument pipe valve made of carbon structural steel, alloy structural steel and stainless heat-resistant steel for steam boiler pipes with high pressure and above. These boiler pipes work under high temperature and high pressure, and the pipes will be oxidized and corroded under the action of high temperature flue gas and water steam, Therefore, it is required that the instrument pipe valves have high endurance strength, high oxidation resistance, and good organizational stability.