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1. Selection instructions for gate valve In general, gate valves should be preferred. Gate valves are not only suitable for media such as steam and oil, but also for media containing granular solids and high viscosity, and are suitable for valves in venting and low vacuum systems. For media containing solid particles, the gate valve body should have one or two purge holes. For low-temperature medi...
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Difference A safety valve is a special valve in which the opening and closing parts are in a normally closed state under external force. When the pressure of the medium in the equipment or pipeline increases beyond the specified value, the medium is discharged outside the system to prevent the pressure of the medium in the pipeline or equipment from exceeding the specified value. Safety valves bel...
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There are many types of valves, each with its own advantages and disadvantages. Below are the advantages and disadvantages of five major valves, including gate valves, butterfly valves, ball valves, globe valves, and plug valves. 1. Gate valve Gate valve refers to a valve where the closing element (gate) moves vertically along the channel axis. 1.1 Advantages ① Low fluid resistance, small torque r...
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The commonly used wedge gate structures are divided into three types: elastic wedge, rigid wedge, and wedge type double gate. The sealing surfaces on both sides of the wedge gate have a certain inclination angle with the vertical centerline of the gate, which is called the wedge half angle. The size of the wedge half angle has a significant impact on the performance of the gate valve. When the ang...
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The globe valve is a valve that uses the valve stem to lift and drive the valve head, thereby changing the distance between the valve disc and the valve seat to achieve opening and closing control. The globe valve is the most widely used cut-off valve in chemical production. Globe valves are mainly used for the control of water, steam, compressed air and other pipelines in actual production, but t...
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The spool ball of the floating ball valve moves between the two seat sealing rings with the help of medium pressure, while the spool ball of the trunnion mounted ball valve is connected with the valve stem and rotates around the center of the valve stem, and the floating seat support ring. Floating Ball Valve The ball of the floating ball valve is floating. Under the action of medium pressure, the...
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In today's valve family, gate valve is relatively widely used. Among them, wedge type double gate valve and wedge type elastic gate valve are the most widely used, because they have the best sealing effect. Everything has its advantages and disadvantages. It is because of its good sealing effect that the pressure in the middle chamber will rise abnormally in some occasions. Abnormal boost pressure...
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With the advancement of valve technology, there are more and more types of valves. Globe valves are also used a lot of valves, and high pressure casting globe valves are the product of technological progress. Next, Dervos will give you a detailed introduction to the high pressure casting globe valve. Structural Features 1. The series of cast steel globe valves have reasonable structural design, st...
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Stainless steel valve is made of stainless steel and has a handle, turbine, pneumatic, electric and other transmission structures. It is flexible and light to switch, compact in structure, light in weight, easy to heat preservation, easy to install, and has excellent sealing performance and corrosion resistance. Connection methods include welding, thread, flange, etc. Stainless steel valves are wi...
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Stainless steel gate valve is a device used to control the direction, pressure and flow of fluid in the fluid system. The material of stainless steel gate valve is an alloy composed of iron, chromium, carbon and many different elements. Iron is the main component element, and chromium is the main alloying element. Generally speaking, the chromium content must account for at least 11% to be called ...
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