Page 61 - Improving Machinery Reliability

Requirements Specif cation 33

(SEE NOTE 1)
(SEE NOTE 2)

TYPICAL ARRANGEMENT FOR E~&~l\:NopRoT T'YPICAL ARRANGEMENT FOR
MECHANICAL-FLOAT-TYPE TRAPS LEVEL-TRANSMITTER-CONTROLLER-TYPE
TRAPS
NOTES:
1. Option A-12a: The purchaser may specify a vent to the flare.
2. Option A-12b: The purchaser may specify a vent to the gas system.
3. Option A-12c: The purchaser may specify a vent to the suction of a lower pressure casing.
4. Option A-12d: The purchaser may specify mist eliminators.
5. This line is omitted if the seals are not at the same pressure.
Figure 1-22. Inner seal drain traps. (Courtesy American Petroleum Institute.)

1. Vendor's standard execution or systems configuration is often not sufficient for
maximum reliability of rotating machinery.
2. The specifying engineer should make a component review before analyzing the
adequacy of an entire system. He must be familiar with the function of machin-
ery components and interacting auxiliary systems before he can specify for reli-
ability, maintainability, and efficiency.

To close the loop, we include Figure 1-24, a simplified lube and seal oil schematic
for a turbine-driven centrifugal compressor.