Compressor Shaft Seal Replacement - For Vsh/Vssh Units; Shaft Seal Removal -For Part# 25985Y And 25985Ya; Table 5-16. Vsh/Vssh Shaft Seals - Emerson Vilter VSS Installation, Operation & Maintenance Manual

Section 5 • Maintenance/Service
Compressor Shaft Seal Replacement - For VSH/
VSSH Units
Shaft Seal Removal - For Part# 25985Y and
25985YA
(see Table 5-16 and Figure 5-62)
WARNING
Follow local lock-out/tag-out procedure. Compressors
must be depressurized before attempting to do any
work on them. Failure to comply may result in serious
injury, death and/or damage to equipment.
There will be a small amount of oil drainage as the
shaft seal housing is removed.
1. Remove bolts (281) securing shaft seal housing
(218) to compressor.
2. Insert two bolts (281) into threaded jacking holes
to assist in removing shaft seal housing (218).
3. Remove silicon carbide rotating face (219.6) &
O-ring (219.7) from shaft.
4. Remove spring holder (219.8) from shaft.
5. Remove oil seal (230) from shaft seal housing (218).
6. Remove retaining ring (219.5) from seal housing.
7. Flip the seal housing over and carefully tap the
stationary silicon carbide piece (219.3), retainer
(219.4), and O-ring (219.2) out of the seal housing
using brass drift and hammer.
8. Remove O-ring (260).
Figure 5-62. Shaft Seal Breakdown (28985Y & 28985YA)
5 – 58
NOTE
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
NOTE
VSH/VSSH compressors are designed using the
following shaft seals, see Table 5-16 for their VPN
and pressure ranges.

Table 5-16. VSH/VSSH Shaft Seals

Pressure (PSI)
Shaft Seal
Static Dynamic
25985Y 1800
25985YA 1800
25985W 1800
25985WA 1800
O-Ring Material
1350 Fluoroelastomer
1350 EPDM
1350 Fluoroelastomer
1350 EPDM