Dry gas seal system
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The last edit to this post was made by qq_Never give up 759759 on December 28, 2017, at 20:01. Hello everyone, our factory has acquired a dry gas sealing system from Sichuan Nikki Sealing Factory. It includes upstream pressure, the pressure difference between the upstream air and the balance tube, sealing air, and isolation air. The functions of each air source. As shown in the following images, why can’t the pictures be displayed?
There are two gas sources: the low-pressure one is nitrogen, and the high-pressure one is the purified process gas~~~ If you don’t understand, check the diagram?
Sealing gas is used for sealing purposes; since its pressure is higher than that inside the equipment, it will leak inward to prevent the internal gas from escaping outward. A small amount of this sealing gas does leak outward. The isolation gas should be present between the isolation bearing and the seal chamber, to prevent oil and contaminants from reaching the sealing surfaces. It depends on the diagram to explain
If qq554946129 has any pictures, they can be sent to me; I’m also learning this
Check the process gas pressure at the inlet; use nitrogen if the pressure is low, and use the process gas itself if the pressure is high, taking the process gas from the compressor outlet. It belongs to the first stage of sealing, intended to prevent leaks of process gas; however, even dry gas seals cannot achieve zero leakage, with typical leakage amounts of several cubic meters. Nitrogen is used as the sealing gas, and it constitutes the second level of sealing. After the first seal leaks, the second seal will take over the sealing function; however, there will still be some leakage, amounting to a few cubic meters as well. Nitrogen is used to isolate the lubricating oil, preventing it from entering the dry gas seal. A pressure of around 20 KPa is sufficient. The pressure difference between the feed air and the balance line is actually the pressure difference at the inlet and outlet of the compressor. When the compressor is not in operation, the inlet and outlet pressures are equal, so no pressure difference can be created. Without such a pressure difference, pre-charged gas cannot be injected. Typically, when there is no pressure difference, the sealing system will automatically activate a booster pump to force process gas into the seal, thereby ensuring the proper functioning of the dry gas seal.