Does the overflow pipe of the heat transfer oil high-level tank need to remain open at all times?
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During operation, does the overflow pipe of the thermal oil surge tank need to remain open at all times? Does the drain pipe of the low-level sump need to remain open continuously?
In my opinion, they all need to be kept running. The function of the high-level tank is to accommodate the volume increase that occurs when the heat transfer oil expands; in case there is an excess amount, it can flow through the overflow pipe to the low-level oil tank, thereby preventing the tank from overfilling； The vent tanks of the low-level oil tanks should also be kept open to maintain positive pressure. However, many companies now require control of organic vapors; direct emission into the atmosphere is not allowed, and a nitrogen seal must be installed