SECTION 033000 - CAST-IN-PLACE CONCRETE

Sludge Treatment Project Engineered Container Retrieval and Transfer System January 2012
cooling/lubrication filter, and thermal bypass valve. The lubricant filter shall have a 25
micron rating (maximum) and shall be a screw-on type with a differential pressure
indicator.
9. The compressor unit shall incorporate an air cooled lubricant cooler of sufficient size to
insure that the lubricant temperature from the compressor shall not exceed 190 deg F with
105 deg F ambient at full load. A thermostatic valve shall be included to insure that the
discharge lubricant temperature does not fall below 170 degrees F. on cold days.
10. The compressor shall incorporate a synthetic lubricant to prolong the bearing life and
extend the lubricant life to at least 8,000 hours under normal operating conditions.
11. Air/Lubrication Receiver and Separation System: The unit shall be equipped with a
combination air receiver/lubricant reservoir assembly, rated at 235 PSIG. This assembly
is the first step in air/lubrication separation. It shall incorporate a means of observing the
lubricant level while the compressor is running, and an ASME coded safety relief valve
of adequate size set at 235 PSIG. Additionally, a lubricant separator with a spin-on
element and service indicator shall be located in the discharge air line for ease in
servicing.
12. Each air compressor shall be equipped with an internal air cooled after cooler and
moisture separator with automatic drain trap. The after cooler shall cool the compressed
air to within about 15-20 degrees F. of the ambient air temperature. Air cooler shall be
Electric-motor-driven, fan-operation, finned-tube unit; rated at 250 psig and leak tested at
350-psig minimum air pressure; in capacities indicated.
13. The compressor assembly shall be mounted on a fabricated steel base.
14. The assembly shall include a sound attenuating enclosure with easily removable side
panels for maximum serviceability.
15. Motor (Each Air Compressor):
a. Horsepower: 40 maximum with a 1.25 maximum service factor.
b. Speed: {Seller selected} rpm.
c. Horizontal, ball bearing, drip proof, C-face, of standard manufacture NEMA
design "B" with class "F" insulation.
d. The motor shall be direct coupled to the compressor for permanent alignment and
incorporate a dry type coupling for minimum maintenance.
e. Efficiency shall meet minimum EPACT requirement.
16. Main Compressor Unit Electrical Characteristics:
a. Volts: 480.
b. Phase(s): Three.
c. Hertz: 60 Hz.
d. Full-Load Amperes: Seller selected .
e. Minimum Circuit Ampacity: Seller selected.
f. Maximum Overcurrent Protection: Seller selected.
17. Electrical Characteristics:
a. Volts: 120 Vac for HP < 1 or 480 Vac for HP > 1.
b. Phase(s): Single Phase for 120 VAC or Three Phase for 480 Vac.
c. Hertz: 60 Hz.
d. Full-Load Amperes: Determined by Seller.
e. Minimum Circuit Ampacity: Determined by Seller.
f. Maximum Overcurrent Protection: Determined by Seller.
18. Capacity Control: Capacity modulation between zero and 100 percent air delivery, with
operating pressures between 50 and 100 psig. Include necessary control to hold constant
pressure. When air demand is zero, unload compressor by using pressure switch and
blowdown valve.
Contract 44577 KW Annex – Rev. E 44577-CSI-SPEC-001 221519 - 6