Elastomer-Free Compressor Seal

The company's new PDGS elastomer-free, gas-lubricated mechanical seal was specially developed for extreme requirements in high-pressure and low-temperature applications.

The seal's operation and broad range of application have been intensively tested in applications-related trials and test runs. A universal pressure operating range from 1 to 350 bara is the result. Stable leakage rates and reliable operating characteristics are displayed by the PDGS in all operating ranges. Excellent mobility of the purpose-developed dynamic secondary seals is typical in low-temperature duty. In meeting all requirements such as automatic alignment and resistance to extrusion, temperature and chemical resistance, they have exactly those attributes which lend the compressor seal a high level of operation reliability.

Design features

• Secondary seals made of a spring-reinforced special compound with excellent resistance to chemicals (equivalent to PTFE)
• No explosive decompression
• Back-up ring and balancing sleeve of the dynamic secondary seals made of tungsten carbide for zero radial shrinkage, a small controlled extrusion gap, and optimized sliding properties of the secondary seals without "catching"
• Optimized aerodynamic gas grooves, optimal sliding properties during start-up; maximal rigidity of the gas film, also pressureless
• No baffle edge in flow direction, hence self-cleaning effect
• Ceramic-compatible design with friction-locked torque transmission of the rotating seat; no increasing of stresses by shaping operations
• Diamond-like DLC coating of the seal faces

Burgmann, 9009 Pinehill, Suite 212, Houston, TX 77041. Tel: 713-9399515; Fax: 713-939-9091.