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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment
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Catalog excerpts

Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 1

Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment bringing technology to life

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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 2

John Crane’s gas lubricated, non-contacting Type 2800E Series seals The John Crane Type 2800E is a noncontacting dual seal for non-turbo smallbore rotating equipment applications, meeting the requirements of standards such as ISO3069C and DIN 24960. As the world leader in spiral groove technology, John Crane has more than 15,000 Type 2800E Series spiral groove seals in use in over 50 countries worldwide, with over 100 million hours of operational time. Fugitive pump emissions are contained safely throughout the long life of your John Crane seal • Highest reliability in sealing volatile...

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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 3

Our technology for your benefit Patented John Crane spiral grooves are machined into the mating ring faces. A suitable pressurised 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 2800E Series spiral groove continues to operate, even if barrier gas pressure is momentarily lost, maintaining the gas film...

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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 4

John Crane’s gas lubricated, non-contacting Type 2800E Series seals An alternative to magnetic drive pumps With Type 2800E Series seals, you don’t need inefficient mag drive pumps. By eliminating sealless pumps, you eliminate: • Capital expenditures for replacement of existing pumps to comply with emission legislation • Expensive operation due to losses in magnetic couplings • Maintenance problems due to fluids that are poor lubricants, abrasive or corrosive, affecting sleeve bearing life • Liquid flashing in the drive area that can result in dry-running the bearing with catastrophic pump...

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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 5

Kind to the environment We live in an era where industry recognises its responsibilities to the greater community more than ever before. Climate change, recycling, emissions, contamination, energy usage, and safety are now key drivers for many societies. The John Crane Type 2800E Series seal range provides a positive contribution to rotating equipment users as they respond to these challenges. According to the Fluid Sealing Association, a 50mm conventional wet seal, rotating at normal pump speeds and pressures uses 10330 KWh of electricity per annum. The cost of this electricity to the end...

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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 6

The Type 2800E Series seal family Evolving with customer needs and technology development, the Type 2800E Series seal family now offers variations according to specific application needs of customers. 2800E seal range categories 2800E The most popular types for all general applications up to 16 bar g, 1450-3600rpm speeds, and max 6% by volume solids in suspension. Specially adapted version capable of handling up to 20% by volume solid in suspension. Specially adapted version capable of running at very low machine speeds, from 300-1450 rpm. Broadest operating ranges The Type 2800E Series...

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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 7

Supporting Type 2800E Series seals All you need is readily available, low-cost barrier gas The barrier gas required in a Type 2800E Series system is any suitable clean dry gas supplied to the seal at 20 to 30 psig/1.5 to 2.0 bar g above the process pressure. Suitable gases are highly economical plant nitrogen, bottled nitrogen or plant instrument air, and no forced circulation is required. Type 2800E Series total barrier gas consumption is typically just 0.05 to 0.5 SCFH/25 to 240 ml/min. A minute amount of gas is consumed by the Type 2800E Series seals into the process and atmosphere. For...

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Non-Contacting, Gas Lubricated Seals for Small-Bore Rotating Equipment - 8

John Crane’s gas lubricated, non-contacting Type 2800E Series seals Type 2800E Series seals serve this partial list of representative fluids: Acetone Acetic anhydride Acrylonitrile Alkyl resins Amines Ammonia Anhydrous cyclohexane Benzene Bisphenol acetate Butadiene Chlorine gas Dichlorobutadiene Dichloroethane Ethanol Ethyl chloride Ethyl hexanol bottoms Formaldehyde Gasoline Glacial acrylic acid Hydrocarbon Isobutyl alcohol Kerosene LPG Methanol Methylene chloride Molten chemical tar Nitric acid Organic acid Phenol Plastic pigment Propane/butane Propane with caustic Recycle gas Santotherm...

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