Dry gas seal is a new non-contact seal developed in the late 1960s by fundamentally improving mechanical seals based on gas dynamic pressure bearings. In fact, it mainly achieves non-contact operation of the sealing end face by adding dynamic pressure grooves on the dynamic ring of the mechanical seal and corresponding auxiliary systems. John Crane Company in the UK was the first to successfully apply dry gas sealing to gas transportation equipment on offshore platforms in the late 1970s. Dry gas sealing was originally developed to solve the problem of shaft end sealing in high-speed centrifugal compressors. Due to the non-contact operation of the sealing, the material of the sealing friction pair is basically not limited by the PV value, making it particularly suitable as a shaft end seal for high-speed and high-pressure equipment.

The GASPU nitrogen generator has been maturely applied to multiple sets of centrifugal compressors for dry gas sealing, effectively protecting the equipment. At the same time, due to on-site nitrogen production, it greatly reduces the cost of using nitrogen for users.

• Redundant unit design
  Due to the use of nitrogen as a dry gas seal in units such as large centrifugal compressors, which require absolute reliability, redundant units are also designed for nitrogen production units.
• Highly automated work
  The GASPU nitrogen production unit is completely controlled by PLC, achieving unmanned operation.
• Optional remote/local working status
  The GASPU nitrogen generating unit is applied in power plants/natural gas plants/other occasions, and the equipment is generally placed far away. Under normal conditions, it is in remote working mode. When it is shut down for maintenance, it switches to local working mode
• Optional SIL2/SIL3 certified control card
  For some customers with special requirements, GASPU can provide SIL2/SIL3 certified control cards to ensure high security.