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Valve actuator / actuation -(4)-angle stroke valve actuator application
Angle stroke valve actuator application products: 1. Butterfly valve: The baffle of the butterfly valve controls the flow of fluid with the rotation of the shaft. It is composed of valve body, baffle, baffle shaft and shaft seal. Its simple structure, small size, light weight, low cost and large flow capacity are especially suitable for […]
Valve actuator / actuation -(3)-classifications
Double acting valve actuator: The selection of double-acting actuators takes DA series pneumatic actuators as an example. The output torque of the gear-and-pinion actuator is the piston pressure (supplied by the air source pressure) multiplied by the pitch circle radius (arm). And the friction resistance is small and the efficiency is high. The output torque […]
Valve actuator / actuation -(2)-classification and working principle
Classification of valve actuators: (1) According to the driving energy used, the actuator is divided into three types: pneumatic, electric and hydraulic actuators. (2) According to the form of output displacement, the actuator has two types: angle type and linear type. (3) According to the law of action, actuators can be divided into three types: […]
Valve actuator / actuation -(1)-introduction
The valve actuator is an indispensable part of the valve automatic control system. Its function is to accept the control signal sent by the controller, change the size of the controlled medium, so as to maintain the controlled variable at the required value or within a certain range. According to their energy form, actuators can […]
Valves’ sealing requirements and daily maintenance
The sealing performance of the valve refers to the ability of each sealing part of the valve to prevent the leakage of the medium. It is the most important technical performance index of the valve. There are three sealing parts of the valve: the contact between the opening and closing parts and the two sealing […]
Stainless steel valve material parameters and specific applications
The following are several stainless steel valve material parameters and specific applications: (1) Angle stroke includes ball valve, butterfly valve, plug valve, etc. (2) Straight stroke includes gate valve, globe valve, angle seat valve, etc. This classification method is divided according to the principle, function and structure. It is the most commonly used international and […]
Classification of valves
Valve classification by function and purpose: (1) Cut-off type: such as gate valve, globe valve, plug valve, ball valve, butterfly valve, needle valve, diaphragm valve, etc. The cut-off valve is also called a closed-circuit valve or a cut-off valve, whose function is to connect or cut off the medium in the pipeline. Check valve, also […]
Installation attentions for valves
Precautions for valve installation: Globe valves, throttle valves, pressure reducing valves, check valves and other valves are all directional. If the throttle valve is installed upside down, it will affect the use effect and life. If the pressure reducing valve does not work at all, if it is stopped The return valve can even cause […]
Current status and development of Chinese valves
Domestic status: In terms of technical support for valve production and R&D, domestic valves are not lagging behind foreign valves. On the contrary, many products are comparable to international companies in terms of technology and innovation. The development of the domestic valve industry should move towards high-end modernization. Driven by the four major forces of […]
Valve cleaning steps and assembly requirements
Valve cleaning steps: The valve parts must go through the following processes before assembly: According to the processing requirements, some parts need to be polished, and the surface must not have processing burrs, etc.; All parts are degreased; After degreasing is completed, pickling passivation is carried out, and the cleaning agent does not contain phosphorus; […]