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Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps
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Catalog excerpts

Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps - 1

Zero Emissions Easy to Install Lower Total Life Costs >

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Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps - 2

John Cranes gas lubricated, non-contacting Type 2800 Series Seals Highest reliability in sealing volatile fluids Positive sealing of high purity fluids with virtually no process contamination No damage to pump from corrosive fluids leakage Zero emissions to atmosphere Simple to install Pump cavitation and dry-running does not affect seal performance > As the world leader in spiral groove technology, John Crane has more than 1,000 Type2800 Series spiral groove seals in use in over 50 countries. The unique technology of the Type 2800 Series is the reason why. >

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Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps - 3

zero emissions , plus: > Patented John Crane spiral grooves are machined into the mating ring faces. Apressur-ized suitable inert gas is injected between the seals. As the shaft rotates, gas flows into the tip of the spiral groove and is compressed at the sealing dam, the ungrooved portion of the mating ring. At the sealing dam, gas is expanded. The resultant film pressure gives an opening force greater than the closing force, thus separating the faces. The Type 2800 spiral groove continues to operate, even if barrier gas pressure is momentarily lost, main- taining the gas film between the...

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Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps - 5

Type 2800 seals cover a wide range of performance capabilities:Temperature-40F to +500аF/-40C to +260аC PressureTo 300 psig/21 barg SpeedTo 5,000 fpm/25 m/s > John Crane proprietary computer programsCSTEDY > SM and CTRANS > SM חassure optimaldesign of critical components for peak performance, and accurately predict that perfor-mance. The prediction is based on analysis of the combined effects of pressure, tempera- ture, fluid sealed and friction on the distortion, and temperature distribution. > 144678111143175207240(psi) Type 2800 Series Seals comply with air pollution and international...

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