compressor seal
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What are the types of compressor seals? What are the pre-gas, isolation gas and sealing gas for our company’s compressor seals? Please tell me.
The pre-gas is filtered process gas, the sealing gas is secondary buffer gas, and the isolation gas is to isolate the oil and gas in the bearing box from entering the sealing chamber.
This should be a dry gas seal. The pre-gas is the medium compressed by the compressor. It belongs to the main sealing gas. Most of it returns to the compressor.； The sealing gas and isolation gas are nitrogen. The main function of the isolation gas is to prevent the lubricating oil of the bearing box from contaminating the seal.
This is a tandem dry gas seal. The pre-gas is also called the primary sealing gas or the main sealing gas. The gas source is for the own process or high-pressure nitrogen. It leaks to the main body. If the mechanical seal leaks, the torch discharge flow will have alarms and interlocks. The sealing gas is the secondary sealing gas, which is usually low-pressure nitrogen and is normally discharged to the torch. The isolation gas is to isolate the lubricating oil from entering the dry gas seal and drain it normally.
isolation gas: Nitrogen is generally used to isolate the sealing gas and lubricating oil to prevent oil from entering the gas circuit and contaminating the sealing gas. Sealing gas: Used to seal to prevent process gas leakage, this part of the gas can be released or recovered. I don’t quite understand the pre-gassing