Flowserve Dual Pressurized Seals - Manual (Page 6)

6
4 Ball Drive Seal Designs
The drive ball replaces the set screws in the seal drive and provides the following features:
• It compensates for axial shaft adjustment to reset the impeller
• It compensates for axial shaft movement due to thermal expansion or mechanical
loading of the equipment.
• It provides for positive seal drive without the use of seal setting dimensions.
4.1 Follow the instructions in Section 2 or 3, Scribe Mark A or B are unnecessary.
4.2 Slide the rotating seal assembly down the shaft or sleeve until the predrilled
indentation in the shaft or sleeve is directly under the spring gap. Insert the ball
into the predrilled indentation. See Figure 2.
4.3 Slide the rotating seal assembly forward to confine the ball in the seal drive slot.
See Figure 3.
Figure 2
Figure 3
4.4 Complete the seal and pump assembly as instructed in Sections 2 and 3.