Steam-heated reaction kettle
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In a standard steam-heated reaction vessel, is a pressure reducing valve + control valve connected to the steam inlet? What about an outlet steam trap + stop valve? Seeking guidance from those more experienced
A shut-off valve is installed first at the outlet, followed by a steam trap. The inlet pressure reducing valve may not be necessary; it depends mainly on the pressure of the feed steam. If it isn’t too high, the control valve can adjust automatically; however, it is necessary to install inlet and outlet stop valves on the control valve to facilitate maintenance. Last edited by sister on 2009-2-5 08:11]
A common setup in companies is to install a pressure reducing valve at the inlet, along with a control valve； A stop valve and a steam trap are connected at the outlet.
:) The sequence is correct; a pressure gauge should be installed after the pressure reducing valve； Stop valves should be installed both in front of and behind the (reducing valve + control valve) as well as the steam trap ； And another shut-off valve also needs to be connected in parallel. This is necessary to ensure normal and stable operation
Then, if temperature control is achieved using a self-acting temperature control valve (the opening degree of the temperature control valve is adjusted to regulate the amount of steam)
A stop valve is connected in parallel to the pressure relief valve, and the pressure gauge is installed after this parallel connection. The stop valve is used for the maintenance of the pressure reducing valve.
The common practice is to install a pressure reducing valve on the main steam pipe in the workshop; in order from front to back, this setup consists of [pressure gauge + (control valve + pressure reducing valve + stop valve) + pressure gauge], with a bypass stop valve added to the valve assembly, plus a safety valve. This arrangement ensures safety. A stop valve and a steam trap can be installed behind the reaction vessel. For special cases, a separate pressure reduction system is installed (i.e., equipment with relatively low pressure is used).
Generally, a pressure reducing valve is installed on the main steam pipe, while the steam inlet of the reaction vessel is equipped only with a control valve and a stop valve, along with a pressure gauge. The control valve is placed in front of the stop valve and is used when it is necessary to replace the stop valve. Some reaction vessels require cooling with circulating water after being heated by steam; it is advisable to install a filter in front of the drain valve at the outlet.
Under normal circumstances, pressure regulators are not used, as factories have a comprehensive range of steam at low, medium, and high pressures. Pressure regulators are considered only when there are significant differences in the temperature and pressure of the incoming steam. Moreover, import and export processes are not as simple as you say; generally, a control valve assembly is installed on the inlet side, and a steam trap assembly on the outlet side, with isolation valves and bypass valves available both at the front and back
In cases like yours, a pressure regulator is generally not needed, as the steam pressure is already reduced by the pressure in the device’s main steam pipeline. A control valve assembly is installed at the inlet to the reaction vessel, while at the outlet there is a sintered globe valve along with a steam trap; a bypass using another sintered globe valve is also provided, so that in case the steam trap fails, it can be removed for repair