Flowserve Pac-Seal Type 51 User Manual

Installation

Experience In Motion

Instructions

Pac-Seal Type 51 and 52

Mechanical Shaft Seal

TM

Description

The Pac-Seal Types 51 and 52 are similar to the Types 21 and 31 in design, with a crimped head and hex-torque drive system but with a

more exible bellows. The convolution in the seal bellows allows for greater axial movement and shaft deection than Types 21 and 31. This adds exibility but reduces pressure capability. Both Types 51 and 52 are available in double seal congurations and balanced versions.

Type 51 Nomenclature Figure 1

7516

142

2 157

Part Reference Description

2 Seal Drive/Drive Band

14 Stationary Face/Mating Ring

15 Rotating Face/Primary Ring

16 Spring

28 Shell

75 Drive Adapter

28

15 126

14

142 Retainer/Spring Retainer

157 Bellows Diaphragm/ Elastomer Bellows

2

Type 52 Nomenclature Figure 2