The gas lubricated, non-contacting seal 2800EX is fitted with an excluder, a device of proprietary design that reduces solids within the seal chamber. Capable of handling up to 28% solids, this version operates reliably for solids-heavy fluids within the chemical, pharmaceutical and pulp and paper industries. The 2800MB incorporates a Sealol(r) welded metal bellows and eliminates the need for dynamic O-rings. This seal performs reliably for a variety of process applications, particu-larly where potential for dynamic O-ring hang-up may exist.
All members of the 2800 series utilize spiral groove technology. An inert barrier gas such as plant nitrogen is injected into the barrier chamber and a spiral grooved pattern on one of the sealing faces pumps the gas toward the ungrooved portion of the face. This compressed gas cushion forms a seal dam and prevents escape of the product. During operation, the seal faces do not contact, virtually eliminating seal face wear.
John Crane
Fax: ++1/847/9 67 39 15
Further information cpp-220
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