Control valve position
Thread Content
The heating medium is heated using steam, and controlling the temperature of this medium is generally achieved by regulating the flow rate of steam. So, where should the control valve be installed – at the steam inlet or at the condensate outlet?
It depends on the specific situation, but we usually choose to control the steam inlet.
I think it’s better to use a steam inlet control, with a hydrophoger installed at the condensate outlet. The amount of steam used has a significant impact on temperature regulation. In our production process, we also use towers for regulating the condensate, and these towers require a smaller amount of steam; as a result, temperature regulation is slower, with gradual changes in temperature during adjustments.
Control valves are generally installed at the steam inlet.
Generally, control valves are installed on steam pipelines for the following reasons: 1. If they are placed on condensate pipelines, it will cause the pressure in the heat exchanger to remain constant at the same level as the pressure in the main steam pipeline. If the valve opening is small, this will affect the discharge of condensate, leading to accumulation of liquid at the bottom of the condenser, which in turn affects the equipment and the heat exchange process. 2. There is a steam trap on the condensate pipe, which also has the function of regulating steam; therefore, there is no need to install a control valve on it.
It is correct to install the control valve at the inlet of the steam pipeline.
Agree with the view from the third floor: installing a control valve at the condensate outlet results in slow response in regulation. The control valve should be installed at the steam inlet.
Generally, this control scheme works by placing the temperature monitoring point at the outlet of the medium being heated, while the control valve is installed at the inlet of the steam, thus forming a control loop； Another option is to keep the monitoring point unchanged and install the control valve at the inlet of the medium, but this approach is generally not used
It is generally installed at the inlet of the steam pipeline. A steam trap is provided on the condensate pipeline. If the insulation of the pipeline is inadequate, water hammer can occur easily; therefore, it is not suitable to install one on the condensate pipeline
Well, I also think it’s the steam pipe inlet.