Flowserve Dual Gas Barrier Seals - Manual (Page 2)

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1. Drawing, Brief Description, Explosion Protection, Functional Requirements
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This mechanical seal is designed to provide reliable performance under a wide
range of operating conditions. The information and specifications presented in
this product brochure are believed to be accurate, but are supplied for infor-
mation purposes only and should not be considered certified or as a guarantee
of satisfactory results by reliance thereon. Nothing contained herein is to be
construed as a warranty or guarantee, express or implied, with respect to the
product.
Although Flowserve Corporation can provide general application guidelines, it
cannot provide specific information for all possible applications.
The purchaser/user must therefore assume the ultimate responsibility for the
proper selection, installation, operation and maintenance of Flowserve prod-
ucts. Because Flowserve Corporation is continually improving and upgrading
its product design, the specifications, dimensions and information contained
herein are subject to change without notice.
1.1 Assembly Drawing
The assembly drawing is included in the shipping box with the mechanical
seal.
1.2 Brief Description
A mechanical seal is a device designed to seal a rotating shaft against a
stationary housing, e.g. a pump shaft against a pump casing. The station-
ary components will consist of a seal ring and (depending on the design) a
spring-loaded element. The spring-loaded element can be a spring or a bel-
lows. The seal ring is sealed against the housing with a secondary gasket, e.g.
an O-ring. The rotating components will consist of a seal ring and (depending
on the design) a spring-loaded element. The spring-loaded element can be a
spring or a bellows.
The seal ring is sealed against the shaft with a secondary gasket, e.g. an O-
ring.
A mechanical seal can be supplied as a pre-assembled cartridge or in sepa-
rate components. Assembly is done in accordance with the assembly drawing.
A mechanical seal will run in the pumped product or external source fluid. A
gas seal must always have a film of gas present between the seal faces. The
sealing surfaces are separated from each other by a gas fluid film during shaft
rotation and in principle run without contact and thus minimal wear under
these conditions.