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In industrial production, drain valves play a critical role by eliminating condensate and superheated steam from pipeline systems to maintain normal operation. However, during cold winters, the moisture in pipeline systems is prone to freezing, resulting in the failure or damage of drain valves, thereby affecting the normal operation of the system. Therefore, implementing effective anti-freezing m...
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Selection principles 1. Safety and Reliability Industries such as petrochemicals, power plants, and metallurgy demand continuous, stable, and long-term operation. Therefore, the valves used must exhibit high reliability and safety factors. Valve failures should not lead to major production safety incidents or personal injuries, meeting the requirements for long-term operation of the facilities. 2....
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The sealing surface of the valve is often corroded, eroded, and worn by the medium, making it a vulnerable component of the valve. For example, automatic valves such as pneumatic ball valves and electric butterfly valves have frequent opening and closing and fast opening and closing speeds, and their quality directly affects the service life of the valve. The basic requirement for valve sealing su...
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There are some differences in structural design and application scenarios between angle globe valves and ordinary globe valves. The following are the main differences between them: Structural design Ordinary globe valve: usually adopts a straight through structure, with the valve body and pipeline axis basically parallel. Valves can be opened and closed by lifting or rotating to cut off or control...
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There are some differences in the structure and working principles between the angle-type bellows sealed globe valve and the bellows globe valve, primarily evident in the following aspects: Structural Design Bellows Globe Valve: Primarily utilizes bellows as the sealing element, a flexible metal conduit capable of adapting to the bending and expansion of pipelines to ensure the valve's sealing per...
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The main difference between the double jacket gate valve and the ordinary gate valve lies in its special double jacket structure. This structure allows the double jacket gate valve to operate over a broader temperature range and provides more precise control over the fluid temperature. Here are some key distinctions: Double jacket structure Double Jacket Gate Valve: Features a dual-layer jacket st...
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Valves used underground are mainly used in pipeline systems to control the flow, pressure, and direction of fluids. Different types of valves have different functions and uses in underground applications. The following are some common types of valves used underground: Gate Valve: Gate valve is a common type of valve, typically used for fully open or fully closed applications, rather than for regul...
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1. If a water hammer occurs in the steam main pipe, it is necessary to immediately and slowly close the valve, cut off steam flow, and the water hammer may stop. Wait for the water hammer to stop, then slowly open the valve. If the valve is closed and the water hammer still does not stop, it indicates that the wave shaped water hammer is formed due to sudden condensation of steam. When the condens...
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1. Non rising stem gate valve: The stem nut is located inside the valve body and in direct contact with the medium. When opening and closing the gate, rotate the valve stem to achieve this. The advantage of this structure is that the height of the gate valve remains constant, so the installation space is small, making it suitable for gate valves with large diameters or limited installation space. ...
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Structurally Gate valves can rely on medium pressure to tightly close the sealing surface, thereby achieving the effect of no leakage. When opening and closing, the sealing surface of the valve core and valve seat always come into contact and rub against each other, so the sealing surface is prone to wear. When the gate valve is close, the pressure difference between the front and back of the pipe...
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