Where is the appropriate position for the hydraulic control valve at the bottom of the pressure reducing tower?
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One of the two options is to install a regulating valve directly at the pump outlet to control the liquid level at the bottom of the tower? The downside is that the temperature is too high for maintenance. The requirements for the front and rear hand valves of the regulating valve are high. The second is to move the regulating valve back to a position of 200~300 degrees, which ensures safety but the adjustment time lags behind. Tell us what you think! !
We installed it in front of the cooler. I personally feel that the temperature is a bit low and the oil replacement was not clean during maintenance. It made the place very dirty.
Install a regulating valve directly at the pump outlet to control the liquid level at the bottom of the tower, which can ensure that the heat exchanger does not hold pressure. If the regulating valve is not easy to use after installing it after the cooler, it will easily produce pressure. Our residual oil is transported over long distances, so it must be determined based on the conditions of the device.
If the heat exchanger is installed in front of the heat exchanger, is it convenient for instrument maintenance? Are there any special requirements for the gate valves before and after the regulating valve? What are the precautions for installing the condensation valve?
It is installed in front of the cooler but we don't use it. The liquid level is controlled by frequency conversion.
We install it in front of the cooler at about 150°C, which mainly reduces the requirements for the regulating valve. The disadvantage is that the heat exchanger bears relatively high pressure and is prone to leakage. In order to prevent the impact of large pressure fluctuations on the heat exchanger, the regulating valve has a very narrow valve position action area. If it exceeds the range, it is manually controlled, which feels more troublesome to operate. If frequency conversion is used, the adjustment should be much better, but the bottom-reducing pump is a high-voltage motor. At present, the frequency conversion technology of domestic high-voltage motors is not mature enough, and the modification cost is also high. After many considerations, I still have no determination to change.