，在UNGC 12248-89 Steam Trap Terms的基础上
Steam Trap Terms
Steam traps are valves that are used to control and regulate the flow of steam in a system. The term steam trap is derived from the word “trap” which means to capture or divert fluid. It is also used to measure and control steam pressure in a system, commonly known as a regulator.
Steam traps are used in a variety of industrial and commercial applications, including power plants, oil refineries, chemical plants, and commercial and residential heating systems. Steam traps have a few specific terms associated with them, which are outlined below.
Pressure Drop: The difference in pressure between the upstream and downstream side of the steam trap. It is related to the operating temperature of the steam trap, as well as the flow capacity and size of the pipe through which the steam is passing.
Pressure Setting: The pressure setting is the preset pressure that the steam trap must be set to in order to operate correctly. It is important to ensure that the steam trap is set to a pressure level that is compatible with the system it is installing in, otherwise it may be too weak or too strong for operating efficiently.
Flow Capacity: The flow capacity of a steam trap is the maximum steam flow rate it can handle without damaging the system or performing inadequately.
Differential Pressure: The difference in pressure between the upstream and downstream side of the steam trap. It is related to the pressure setting, and is a key factor in how the steam trap will respond to different steam pressures.
cycle: The cycle of a steam trap refers to the frequency at which it can cycle between its opening and closing, or “stroking”, positions. Generally, the faster the cycle, the more efficient the steam trap will be.
Relief Valve: This is an internal or external device that is used to relieve the pressure of steam, should the pressure in the system exceed the preset pressure of the steam trap. It is important to ensure that the relief valve is sized correctly for the system that it is installed in, to ensure efficient operation.
Strainer: This is a device that is used to trap any particulate matter, which may be present in the steam. It should be checked and replaced regularly to ensure efficient flow of the steam.
Orifice Plate: This is a flat disc that is placed in the inlet of the steam trap. It is used to restrict the flow of steam to a certain rate, and should be matched to the operating pressure of the system to ensure efficient operation.
Back Pressure Regulator: This is a valve used to control the pressure in the steam trap, to ensure that it is working correctly. It should be checked regularly to ensure that it is functioning correctly.
These are just some of the terms associated with steam traps, and they are important to know if you are planning to install one in your system. Knowing these terms will enable you to be sure that your steam trap is properly sized and working correctly, and will ensure the most efficient operation of your system.
