Thread Content
I just found a pretty good website; although it belongs to a manufacturer, the animations on it are quite vivid. You can take a look at http://www.tlv.com/global/CN/steam-theory/what-is-a-steam-trap.html. Topic: What is a steam trap? Thermostatic valves and nozzles Part 1: Thermostatic valves and nozzles Part 2: Insulation of thermostatic valves, installation direction of thermostatic valves, backpressure steam for thermostatic valves, history of thermostatic valves Part 1: History of steam thermostatic valves Part 2: Steam traps and air traps, condensate recovery, stagnation phenomenon 1 (causes and consequences), stagnation phenomenon 2 (methods to prevent stagnation), pipes/other check valves, installation and benefits, steam pressure reducing valves, types and applications of valves. If you find it useful, you might want to take a look... Below are some excerpts from the text... What is a steam thermostatic valve? Steam traps are one of TLV’s most representative products, but the question is, what exactly are steam traps? Literally, a steam trap is a device that prevents steam from passing through. It is named so because it is generally used in steam systems where it is necessary to only remove condensate water while keeping steam leakage to a minimum. “In the technical terminology for valves specified in JIS B 0100, a \"drain valve\" is defined as a device that can automatically remove condensate from equipment or pipelines without any external assistance. A steam trap is an automatic valve. What is the purpose of installing a steam trap? Why is it necessary to use a steam trap when heating objects with steam? Steam is a gas formed by water under high temperature and pressure; however, once it has completed its heating function (that is, once it has lost its latent heat), it condenses to form condensed water. In other words, condensed water does not have the ability to heat objects like steam does. This is why condensed water must be removed promptly, whether in steam transmission pipes or heat exchangers. Back pressure of a steam trap. What is back pressure? For a steam trap or valve, the pressure downstream of it is the \"back pressure\". In other words, “back pressure” is the pressure at the outlet or on the secondary side. The difference between the pressure at the steam trap inlet (primary side) and the “back pressure” is the operating “pressure difference”. If the condensate at the rear of the steam trap is discharged directly into the atmosphere, no back pressure is generated. Even if the condensate is discharged directly into the atmosphere, if it has to pass through many bends, it will encounter resistance that hinders flow, thereby creating backpressure as well. I hope it can be useful. I just started using a check valve, so there’s a lot I don’t understand; let’s learn together*