Pneumatic control valve consulting rongjun valve pneumatic control valve connection mode

Pneumatic control valve consulting rongjun valve pneumatic control valve connection mode

Pneumatic control valve before and after the pressure difference is large, and the actuator output force is not enough will also appear internal leakage fault. Should check the reason for the large pressure difference, is the process factors, or the selection error, increase the output force of the pneumatic actuator, is the common method to improve the sealing performance, such as adjusting the working range of the spring, switch to small stiffness of the spring; Additional locator, adjust the air source pressure; Still no change, can only switch to a larger thrust pneumatic actuator.
Valve positioner is a major attachment of pneumatic control valve, it will stem the displacement feedback signal as the input signals, as set in the controller output signal, comparing, when there is deviation, change valve locator to the actuator output signal, the pneumatic actuator movement, the valve stem is established displacement signal a one-to-one relationship with the controller output signal, A feedback control system with stem displacement as measuring signal and controller output as setting signal is constituted.

In reality, the use of pneumatic valve and control valve is indispensable, the working principle of FESTO pneumatic control valve: FESTO pneumatic control valve is composed of an actuator and a regulating mechanism. The actuator is the thrust part of the regulating valve, which generates the corresponding thrust according to the size of the control signal pressure and promotes the action of the regulating mechanism. The valve body is the regulating part of the pneumatic valve, which is directly in contact with the regulating medium to regulate the flow of the fluid.
This steam regulating valve cannot use such limit safeguard. In view, the positive and negative effects of the pneumatic control valve method has a very key effect, if you do not choose the right words, it will produce a lot of inconvenience. Changchun PVC ball valve even with the ball caused friction, but the damage is not much, so the service life of pneumatic ball valve will be longer than the general gate valve; In all gate valve classification, pneumatic ball valve with its small hydrodynamic friction resistance, customer favor favor, such as everyone knows the shrinkage pneumatic ball valve, hydrodynamic friction resistance is very small.
Ensure that sufficient space is left above and below the valve to allow easy removal of the actuator or spool during inspection and maintenance. The space distance can usually be found from the shape dimension diagram identified by the pneumatic control valve manufacturer. For flanged bodies, make sure the flange faces are properly aligned so that the gasket surfaces make even contact. After the flanges are aligned, tighten the bolts gently, then tighten them in a staggered fashion.
The company’s products are: pneumatic control valve, pressure regulating valves, electric control valve, self regulating valve, flow regulating valve, the 3-way regulating valve, fluorine-butterfly regulating valve, steam valve, single regulator, two-seat regulator, film regulator, pneumatic valves, electric control valves, pneumatic regulating valves, electric control valves, etc
The actuator is a device that converts the control flag light into the corresponding action to control the position of the interceptor in the valve or other regulating mechanism. Flag lights or driving forces may be pneumatic, electric, hydraulic, or any combination of the three. Valve body parts are the adjusting part of the pneumatic control valve, tension by the valve shell, stem, spool, seat, gland and seals. They are in direct contact with the medium, under the impetus of the actuator, change the flow area between the spool and the valve seat, so as to achieve the purpose of regulating the flow.
Pneumatic control valve has two types of gas open and gas off. The principle of determining the mode of regulating valve switch is: when the signal pressure is interrupted, the safety of process equipment and production should be guaranteed. If the valve is in the open position after the signal interruption, the fluid is safe without interruption, then the gas shut-off valve is selected; If the valve is in the closed position after the signal pressure is interrupted, the fluid is not safe through **, then the air valve is used. Such as heating furnace fuel gas or fuel oil pipe regulating valve, should be selected with gas valve, when the signal is interrupted, the valve automatically closed, fuel is cut off, so as to avoid furnace temperature is too high and accidents; The regulating valve on the water inlet pipe of the boiler should choose to use gas to close the valve. When the signal is interrupted, the valve opens automatically and still sends water to the boiler, which can avoid the boiler burning dry.
Taichen brand pneumatic control valve is an intelligent automatic regulation products, structure pneumatic film actuator, valve body, positioner and so on a complete set of complete automatic control products, Taichen brand actuator has pneumatic piston actuator, pneumatic film actuator, gas open form, gas open two kinds. The structure of regulating valve body is single seat regulating valve, sleeve regulating valve, two-seat regulating valve, three-way regulating valve and so on. Positioner can be equipped with German Siemens, Japan Yamatu, Korea Yongtai YTC, The United States Fisher, Wanxun, tooling, Wuzhong instrument brands. Pneumatic control valve working principle is through the end of the sensor output signal, by the positioner to accept the signal, control valve opening and closing size, automatic adjustment of pressure, flow, temperature principle. The following details the brand model function of the locator.
The FESTO solenoid valve is not flexible, so that the input and output signals do not correspond, causing oscillation. At this time, the cleaning positioner of the air source pressure relief valve should be opened, and the moving part should be coated with lubricating oil to eliminate friction. As a result of the unbalanced force of the pneumatic control valve itself, the regulating spool often produces oscillation. Zero spring top force is too small, the ability to resist external interference is small, in the case of small external signal, easy to make the spool vibration.
Key words: pneumatic control valve, consulting Rongjun valve, pneumatic control valve connection mode