MIL-HDBK-1191
TABLE 9-6
RECEIVER SIZE
Number
Liters (Gallons)
per DTR
of DTR's
1- 6
38 (10)
7- 9
34 ( 9)
10 - 12
30 ( 8)
13 - 15
26 ( 7)
16 - 18
23 ( 6)
19 - 21
19 ( 5)
Over 21
15 ( 4)
Laboratory Air (LA). The medical or dental laboratory air
9.6.12
(LA) system shall be a central piped system consisting of two or more
compressors and a central receiver, all conforming to the requirements of
NFPA 99 (reference 9r). Either LA system may be combined with the dental
air system. The MA system shall not be used to satisfy LA requirements
except for small laboratories dedicated to support the medical function.
Air Quality Standard. Air compressors used for LA shall be
9.6.12.1
specifically designed and manufactured for this purpose. LA quality
shall be in accordance with the dental compressed air (DCA) requirements
defined in 9.6.11.1. Intake air shall be direct from outdoors or of
quality better than outside air (e.g., prefiltered outdoor air or
relieved return air). Locate intake in accordance with DCA's
requirements as defined in HFPA 99 (reference 9r), Level 3. LA shall be
supplied at a minimum of 210 kPa (30 psig) for dental laboratories and
345 kPa (50 psig) for medical laboratories, with a +35 kPa (5 psig)
tolerance.
LA System Components. LA shall be provided by two equally
9.6.12.2
sized compressors with provisions for automatic, alternate, and
simultaneous operation. Each compressor shall be sized to provide 65% of
maximum demand. Provide an alarm to indicate compressor failure that
annunciates to the master medical gas alarm panel. All system components
downstream of compressors shall be sized for maximum combined compressor
output. A DCA compressed air generator package used to service a LA
system shall be supplied by a dedicated main located just downstream of
the final package component and inside the equipment room.
LA System Demand. The LA system flow demand shall be
9.6.12.3
determined by the number of work stations and their function plus the
requirements for laboratory equipment. The using Military Department
shall provide this information. The designer in conjunction with the
Design Agent shall establish the flow rates. Medical LA system flow rate
demand shall be 0.5 L/s (1 cfm) per outlet. Dental LA system flow rate
demand is determined by the sizing procedure shown in 9.6.11.3. The
simultaneous use factors shall be as follows in Table 9-7:
9-21
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