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The correct selection of valve accessories is of great significance for the reliable and stable operation of pneumatic valves. The control loop of the valve is composed of each accessory. Improper selection or failure of valve accessories can lead to abnormal or refusal of valve operation, posing a huge safety hazard to the process. The compressed air output from the air compressor contains a larg...
In pipeline systems, globe valves and gate valves are two common types of valves. They have some differences in structure, flow direction, sealing surface, opening and closing components, and flow direction. This article will provide a detailed introduction to the differences and advantages and disadvantages of globe valves and gate valves, helping you better understand the differences and applica...
Principles for selecting globe valves A globe valve refers to a valve in which the closing element (disc) moves along the centerline of the valve seat. According to the movement of the valve disc, the change in the valve seat opening is directly proportional to the valve disc stroke. Due to the relatively short opening or closing stroke of the valve stem and the highly reliable cut-off function, a...
Maintaining the worm gear ball valve can extend its service life and ensure its normal operation. The following is the correct maintenance method for worm gear ball valves: 1、 Regular inspections: Regularly inspect the appearance and working condition of the ball valve, and promptly handle any damage or abnormal situations. Meanwhile, check if the fastening bolts of the valve are loose and if ther...
At present, the commonly used hardening processes for the surface of metal hard sealed ball valves mainly include the following: (1) Surface welding (or spray welding) of hard alloy on the sphere can achieve a hardness of over 40HRC. The process of surface welding of hard alloy on the sphere is complex, with low production efficiency, and large area welding can easily cause deformation of the part...
How to choose valve plasma welding equipment? Background of valve overlay welding Scratches, erosion, and corrosion can all damage the valve sealing surface. The composition and metal structure of sealing materials, surface treatment process, hardness and hardness difference, specific pressure and conformity, and many other factors can all affect the quality of valve sealing surfaces. Each type of...
Bellows globe valve, also known as bellows sealed globe valve, is designed with automatic roll welding to form a metal barrier between the fluid medium and the atmosphere, ensuring zero leakage of the valve stem. The internal structure of the bellows globe valve adopts a bellows structure, and the lower end of the stainless steel bellows is welded to the valve stem to prevent process fluid from co...
There are various types of regulating valve structures, each with its own characteristics. In engineering design, it should be determined based on factors such as on-site conditions (temperature, pressure, flow rate, pressure difference, installation position, etc.), fluid properties (viscosity, corrosiveness, saturation temperature, etc.), requirements of the regulating system (adjustable ratio, ...
The working principle of pneumatic expansion butterfly valve is to rely on compressed air provided by the air source to cause elastic deformation of the sealing pair inside the valve body, thereby achieving switch control. After the gas source enters the valve body, it is compressed to a certain pressure through a compressor and then sent into the cylinder, causing the piston to move left or right...
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