What is the gas seal?
Gas seal, often referred to as dry gas seal, is used to close the shafts of centrifugal compressors. Its main advantage is that it does not require lubricating oil and is therefore less likely to contaminate the process. Dry gas seals are used in a hard industrial environment where workers are exposed to many chemicals such as petrochemical processing, extraction and refining, oil drilling and gas transfer. The gas seal disorder may occur for various reasons, including the floods of the compressor, the shaft mismatch or the contamination of the particles.
The gas seal design is essential for its function. It is formed to maintain harmful odors, chemicals and gases in centrifugal compressors and transfer of gases from one place of processing to another. The spiral grooves on the outside of the seal make it easier to lift and manipulate its industrial use. The tiny part of the seal leads the gas towards the non -unsuitable part of the seal. This action captures between the two parts that increaseis an internal pressure. Resistance allows the most protection from any contaminants to touch the face of the gas seal. Liquid film resistance can be adjusted according to the industrial project or the nature of the compressor system.
Dry gas seal has an interesting and diverse history. John Crane Inc., a British Turbomachinie production company was the first to register a dry gas seal patent in 1968. The company patented the above -mentioned model of a spiral groove, which became very popular in oil and petrochemical applications. Before the company introduced the new model, the industry relied on the lubricated seals to close and maintain centrifugal compressors. The lubrication was chaotic, made it difficult to repay the seals and sometimes led to the contamination of the compressor content.
Despite its disadvantages, lubrication is necessary to reduce friction between the facial gas sealing. Innovation jOhn Crane Inc. It was in their use of a dry gas film that reduced friction without the need to lubricate fluids. Two more types of lubrication are used in these operations: Full Liquid film, which carries different types of oils and must be used to operate light processing and partial liquid and gas film, which uses one -piece liquid and gas balance for one part of the gas to maintain the integrity of sealing.