Page 152 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair
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134 Major Process Equipment Maintenance and Repair
Figure 3-98. Exploded view of a liquid ring vacuum pump with side ports. (Courtesy of
SIHI.)
VACUUM IN INCHES MERCURY
% m m n I = 10 15 10 5 0
i , I I I , , t
ABSOLUTE PRESSURE IN MY MERCURY
Figure 3-10. Performance reduction of a liquid ring vacuum pump due to service water tem-
perature rise. (Courtesy of SIHI.)
back to suction where they are not filled with service liquid. Where suc-
tion and discharge ports are arranged in cones around the shaft, the clear-
ances between the cones and the rotor are important for the same reason.
The rotor tip clearance in the casing is less critical since this will be sub-
merged in service liquid.
