Multiple Spring Mechanical Seals
Narrow profile, multiple spring Mechanical Seal, designed for the common American ANSI B73-1974 centrifugal pump standard.
Frequently fitted with Type 23 PTFE boot mounted stationary seal.
Types 1645B and 1645BS are balanced designs for stepped-shafts.
The stock size is always set by the shaft size under the seal body.
A PTFE backup ring is recommended to be specified for higher pressure ‘O’-Ring applications.
Limits are for guidance only. Product performance is dependent on materials and other operating conditions.
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