REFRIGERATION DIVISION
V SERIES
SCREW COMPRESSOR HANDLING MANUAL
Supersedes all previous version. This information is for reference use only and subject to change without notice
Revision 2 (June 05,2000) Page 23 of 61
5) Blind cover (22)
6) Balance piston (30)
7) Bearing cover (16) and Vi changing rod (444)
8) Thrust bearing (38)
9) Suction cover (5) and side bearing (28)
10) Rotors (25,26) and rotor casing (1)
11) Slide valve for variable Vi (289) and unloader slide valve (54)
12) Bearing head (11) and main bearing (27)
3.4.1 Mechanical Seal (100)
3.4.1.1 Disassembly
A new balance type single seal (100) is incorporated into V-Series compressors. A combination hard
metal and carbon alloy is used for the frictional surface of the seal and an O-ring is provided for
packing.
As shown in Fig. 22, the balance type mechanical seal functions well under a wide range of
conditions.
An oil seal (50) is fitted to the inside of the seal to act as an oil retainer. Because the frictional portion
of the seal is subject to wear due to the rapid rotation of the shaft, a collar (109) is provided for the
friction portion on models 200~250 so that the friction portion can be replaced.
Fig. 21 Exploded View of Mechanical Seal (100) Fig. 22 Cross Section of Mechanical Seal
(100)
Component parts of mechanical seal assembly
(48) Seal retainer (104) Seal ring (110) Spring
(49) O-ring (106A) O-ring (111) Set screw
(50) Oil seal (106B) O-ring (528) Sleeve, oil seal
(101) Carbon insert (108) Drive pin (529) Socket detent screw
(103) O-ring (109) Shaft seal collar
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