Industrial shaft seals

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Fig 73. Hook-and-eye
spring connection
Spring connections for split seal types
The SAE 302 stainless steel garter springs are
supplied loosely (separately) in the HS6 style.
The springs are factory-installed and encased
with Spring-Kover (page 199) in the HS7 and
HS8 styles. In styles HS6 and HS8, the spring
connection is generally of the hook-and-eye
type for shafts over 457 mm (18in) in diameter
(fig 73) and of the threaded type for smaller
sizes (fig 74). It is recommended for sealing
light oils as well as heavy greases.
The special control-wire type is available
only in the HS7 design for all shaft sizes and
recommended for grease only. Where positive
spring connections are made, the connection
should be offset to the left or right of the split
for maximum efficiency. See also Table 19.
Fig 74. Threaded spring
connection
Table 19. Spring arrangements for HS seals
Features Solid Types Split Types
HS4 HS5 HS6 HS7 HS8
Spring groove Spring- Spring- Spring- Spring- Springtype
Lock Lock Lock Lock Lock
Spring Factory Factory Threaded/ Control Threaded/
connection made made Hook-and-Eye wire
Spring-Kover None 100% None 100% Covered
covered covered except ends
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