Mechanical Gas SealsMarket Application Publication Background: To reduce the volume of gases containing volatile organic compounds leaking to atmosphere, environmental agencies have instituted regulations limiting VOC emissions. Many large pumps or compressors contain mechanical gas seals that operate as non contacting, dry running seals. These seals isolate compressed gases containing VOC’s from leaking to atmosphere. Mechanical gas seals are designed to perform with a wide variety of gases that can be harmful to workers and the environment. For example, the lubricating gas that is normally used to pressurize the seal is natural gas. A safer alternative to natural gas is dry, inert nitrogen gas which can be generated on site from standard compressed air at a very low cost. Contact Information: Parker Hannifin Corporation Gas Separation and Filtration Division 4087 Walden Ave. Lancaster, NY 14086 phone 716 686 6400 or 800 343 4048 fax 877 857 3800 www.parkern2.com Features and benefits: • Continuous supply of dry N2 at selected purity • Dependable, reliable and automatic operation • Eliminates the need for natural gas for sealing • Uses low pressure plant air supply and eliminates high pressure cylinders • Built-in membrane air dryer is available • Standard customer connections on cabinet models • Designs available for hazardous locations • Compact size affords easy shipping and installation ENGINEERING YOUR SUCCESS

A major manufacturer of centrifugal gas compressors had received an order for several large systems for an overseas co-generation plant. In order to comply with emission regulations and maintain an absolutely tight seal to prevent natural gas from leaking from the mechanical seals, the seals had to be pressurized externally with a dry, inert gas. The compressor was located in a hazardous location in the plant, so it was critical that the inert gas always be available to ensure nonflammable conditions as well as provide proper lubrication for the seals when the compressor was in operation, which...

Custom Nitrogen features and benefits: Parker Hannifin’s reputation for building custom N2 generators for gas seal service is unparalleled in the industry. Some of these features, all supplied by Parker in the past, include: • Redundant generators for 100% backup capabilities • Automatic high pressure storage vessels for back-up supply • PSA or membrane generators, at purities from 95-99.9+% • Integrated high pressure N2 boosters to recharge cylinders automatically • Active/passive complete feed air compression systems • Designed to exacting global customer specifications • Automatic N2 turndown...

175psig to 188 psig (12 barg to 13 barg) 60°F to 120°F (16°C to 49°C) -40°F (-40°C) pressure dewpoint or lower Trace <.01 micron Description Compressed Air Specifications Maximum Pressure Temperature Range Dewpoint Residual Oil Content Particles Ambient Conditions Temperature Ambient Pressure Air Quality 45°F - 110°F (7°C - 43°C) Atmospheric Clean air without contaminants Dimensions, Weight and Connections Consult factory; based on performance requirements Flow Rates: Parker HiFluxx® Membrane Systems Data based on variable feed air pressures at 68°F (20°C) Nitrogen Flow rates (scfm) at 95% Purity*...