Seals take on inhospitable environments
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Meco Shaft Seals product story
Edited by the Engineeringtalk editorial team
Feb 18, 2003
The Ex-Pac combines the best features of Meco's patented EAS and Meco-PAC seals into a superior product, which excels in some of the least hospitable process environments.
The Ex-Pac combines the best features of Meco's patented EAS and Meco-PAC seals into a superior product, which excels in some of the least hospitable process environments.
Ex-Pac seals are often used on conveyors and agitator shafts in reactors, dryers and other equipment where aggressive solvents and other chemicals are present.
They can be used in applications where there is extensive thermal growth of the shaft, or where axial shaft movements are occasionally necessary for adjusting machine clearances.
Ex-Pac seals are frequently installed on extruder-compounders.
The EX-PAC uses a massive housing similar to a stuffing box, containing rotating components which use the traditional Meco elastomeric drive, or in some cases the patented Meco-DR positive drive system.
The Meco-DR system can be constructed without elastomers, where chemical environments dictate.
The purge chamber between the two rotating faces is maintained by a tightly-fitting O-ring around the nose of a gland follower, which in turn compresses the double seal faces.
Ex-Pac seals can be equipped with traditional manual adjustment, or they can be loaded with external springs to compensate for normal wear of the sacrificial seal surfaces.
Where conditions dictate, Ex-Pac seals can be fitted with pneumatic adjusting cylinders, so that seal face pressures can be adjusted by altering applied air pressure.
When equipped with the Meco-DR driving system, the Ex-Pac seal provides exceptional service where the process cycles from pressure to vacuum and back.
A variety of materials for housings and wear parts permits compatibility with most chemical environments and processes under 500F.
Ex-Pac seals can be configured with a variety of purge or flush arrangements, depending on process requirements.
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Contact Meco Shaft Seals
Tel +1 207 371 2210
Other Meco Shaft Seals stories
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Meco launches HB standard-sized seals
Meco Shaft Seals has announced the launch of the HB range of standard-sized seals for screw conveyors and similar equipment. -
Meco seals solve contamination and vacuum issues
Meco Shaft Seals has revealed how its Meco-DR shaft seals can solve contamination and vacuum problems in drying applications. -
Meco shaft seals take stand at POWTEX
Meco custom-engineered shaft seals will be on exhibit at the 17th International Powder Technology Exhibition (POWTEX) in Tokyo on 28-31 October 2008. -
Air-purged seals clear caramelised sugar
Unlike traditional mechanical seals, MECO seal faces are soft, fault-tolerant and almost impossible to break. -
Seal upgrades meet ATEX requirements
Meco has adapted two of its seal designs to comply with ATEX, which considers packing glands unsuitable for service in potentially explosive atmospheres
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