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There are a number of factors that affect valve pressur […]
There are a number of factors that affect valve pressure. These factors include Backpressure, Normal operating pressure, and Maximum allowable pressure. Understanding how each one affects valve performance can help ensure the safety of your equipment. These factors can also affect the design of your valves. To learn more, read on. Here are some examples.The normal operating pressure of a valve is the pressure at which the valve opens and closes. This pressure is often referred to as the CDTP (common differential pressure-to-pressure) of a valve. The CDTP includes corrections for back pressure and temperature.
At this pressure, the valve disc blocks the flow of the fluid and lifts to allow flow. When the operating pressure of the valve is higher than the set pressure, the valve disc starts to chatter.A safety valve's set pressure must not exceed the MAAP of the system. It should be set to a pressure that is not more than 0.1 bar higher than the MAAP of the system. This margin should account for the variations in the system operating pressure that may occur after pressure reducing valves and other control valves.A valve's normal operating pressure range refers to the range of pressure that is normal for that particular valve. While most pressurized systems are designed for a narrow range of pressure, some systems have a very wide range.
Any pressure outside of this range can result in a catastrophic failure of the system.A valve's maximum allowable pressure is called its working pressure, and it is often listed in pounds per square inch (Psi) or megaPascals (MPa) in Europe. It is important to know that the maximum allowable pressure is not always the same as the maximum pressure the valve can handle. For example, a JIS bronze valve may have a nominal pressure of 5 kg, but it can be used up to 0.7 MPa for static fluid at 120 degrees Celsius. In contrast, an ASME Class 150 valve can handle up to 1.96 MPa (MPa) in WCB material. A valve's working pressure rating should always be checked to ensure that it can withstand the pressure that is used in its application.
It is vital to check the maximum allowable pressure of a valve before installing it in a hydraulic system. When the valve is installed correctly, it can ensure the safety and reliability of the fluid system. If it is unable to handle this pressure, the valve may cause excessive wear and tear on its internal components. To avoid this problem, many SRVs come with built-in body drain connections. If that's not possible, a small bore drain should be installed in the outlet piping of the valve.A back pressure regulator is a pressure control device used to keep a valve's pressure upstream from exceeding a preset value. These devices control the pressure upstream by adding an additional pressure loss to the pipe. They are not a substitute for a pressure tank or demand valve in a system.