air flow and pressure to a pressure dewpoint of 2 degrees C 35 degrees F
with entering air at 38 degrees C 100 degrees F saturated. The compressed
air dryer shall be of the refrigerated type.
2.17.6
Intake Air Supply Filter
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NOTE: Designer will indicate location and
capacities of the air filters on the drawings.
Specially filtered air should be provided for all
locations, except laundries and garages, unless
otherwise designated by the Office of the Surgeon
General.
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Dry type air filter shall be provided having a collection efficiency of 99
percent of particles larger than 10 micrometers. Filter body and media
shall withstand a maximum 862 kPa 125 psi capacity as indicated.
2.17.7
Discharge Air Supply Filter
A high-efficiency type micro-coalescer filter shall be provided on the
discharge air line of medical-compressed-air compressors to limit particle
size to a maximum of 2 micrometers.
2.17.8
The air system shall be provided with the necessary regulator valves to
maintain the desired pressure for the installed equipment. Regulators
shall be designed for a maximum inlet pressure of 862 kPa 125 psi and a
maximum temperature of 93 degrees C 200 degrees F. Regulators shall be
single-seated, pilot-operated with valve plug, bronze body and trim, and
threaded connections. The regulator valve shall include a pressure gauge
and shall be provided with an adjustment screw for adjusting the pressure
differential from 0 to 862 kPa 0 to 125 psig.. Regulator shall be sized as
indicated.
2.17.9
Dewpoint Meter
A dewpoint meter shall be provided to continuously monitor the dewpoint of
the medical air. Meter shall meet requirements of NFPA 99.
2.18
VACUUM PUMPS AND RECEIVER
Vacuum pumps in duplicate and one receiver shall be provided. The
capacities of the pumps and receiver shall be as indicated. The pumps
shall be single-stage, positive displacement, nonpulsating, liquid-sealed
or oil-lubricated sliding vane rotary type, designed for vacuum service.
Fluids shall be capable of passing directly through each pump to waste.
Each pump shall be provided with a motor, discharge separator-silencer,
seal water line strainers, flow control valves, and antisiphon fittings. A
control panel to contain the vacuum gauge, vacuum "LEAD" and "LAG"
switches, manual transfer switch to alternate the lead vacuum pump, and
magnetic motor controllers and wiring shall be provided. Gauges and manual
operation switches shall be mounted through the panel door. The receiver
shall be designed to operate at 64 to 85 kPa 19 to 25 inches of mercury
vacuum, but shall be tested at 95 kPa 28 inches of mercury vacuum.
Interior of the receiver shall be galvanized and the exterior may be
galvanized or supplied with commercial standard enamel. Guards shall
SECTION 15405A
Page 59
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