2.6.1.2
Oil Filter
Provide full flow type filter for positive forced feed lubrication
conforming to FS F-F-351.
2.6.1.3
Air Receiver
Receiver shall be [_____] cubic meters feet minimum volume designed in
conformance with FS XX-C-2816 and ASME BPVC SEC VIII D1, except that
working pressure shall be 1724 kPa (gage) 250 psig. Provide the receiver,
with a safety valve set at a pressure not to exceed the maximum allowable
working pressure of the receiver, a drain valve and an air trap with
shutoff valve. [Provide a stand for mounting the receiver.] Provide a dial
gage, not less than 114 mm 4 1/2 inches diameter, range zero to 2068 kPa
(gage) 300 psig, on the receiver.
2.6.1.4
Electric Motor
Motor shall be [_____] volt, [_____] phase, 60 Hz, totally enclosed, fan
cooled not less than [_____] kW hp, as specified under "Motors and Drives"
in this section. Control circuits for motors shall be nominal 120 volts.
2.6.1.5
Controls
Provide [constant speed] [dual control] regulation and the "optional safety
controls" as specified in Table I of FS XX-C-2816 for the compressor
system. In addition, provide a lead-lag control system with alternating
lead-lag cycles.
2.6.2
Instrument Compressed Air System
Provide air compressor package with two compressors, two electric motors,
one horizontal receiver, and control panel, [all mounted on one supporting
steel base with skids] [mounted separately].
2.6.2.1
Air Compressor
Each air compressor shall be a single stage, cross head type, vertical,
double acting, water cooled, nonlubricated head type. Compressor shall be
specially designed for non-lubricated service, with a honed cylinder,
piston rod packing, piston rings and piston wear rings. Valve guide
inserts and wear rings shall be TFE. Valves shall be reversible and
hardened, with stainless steel seat plates for nonlubricated service.
Provide necessary sleeves, baffles, and collars to prevent oil carryover.
Provide air operated, piston type, free air unloaders for capacity
reduction and starting. Mount filter-silencer directly on the air inlet to
the cylinder.
Design and Performance: Each compressor shall deliver not less than [_____]
L/s scfm of free air at a discharge pressure of 690 kPa(gage) 100 psig.
2.6.2.2
Air Receiver
Air receiver shall be a horizontal tank with a volume not less than [_____]
cubic meters feet. Design unit for 1034 kPa (gage) 150 psig working
pressure in accordance with ASME BPVC SEC VIII D1. A receiver bearing the
ASME Code Symbol stamp will be accepted as meeting these requirements.
Provide an automatic condensate trap, safety valve, and outlet connection.
SECTION 15511N
Page 40
Previous Page
