MIL-HDBK-1191
Dental Compressed Air (DCA). A central piped dental
9.6.11
compressed air (DCA) system with two or more compressors and other
components described herein shall be provided in accordance with NFPA 99
(reference 9r), Level 3 compressed air systems. DCA shall be used for
drying applications during dental procedures and as a power or drive
source for lifts, locks, and pneumatic dental instruments and equipment.
DCA, unlike MCA, is not used for breathing or respiratory support of any
kind and shall not be used to satisfy MCA requirements. Air that is
normally used for dental laboratory restorative and fabrication
techniques may be provided by the DCA system. Refer to 9.6.14, for
handpiece drive air requirements.
Air Quality Standard. DCA quality shall be as defined in
9.6.11.1
NFPA 99 (reference 9r), Level 3 compressed air systems. Intake air shall
be direct from outdoors or of quality better than outside air. DCA shall
be supplied to the outlets at a minimum pressure of 620 kPa (90 psig)
with a tolerance of +35 kPa (5 psig).
DCA Components. DCA shall be provided by two or more equally
9.6.11.2
sized compressors, with provisions for automatic, alternating, and
simultaneous operation. Each compressor shall be sized such that if any
one compressor fails, the remaining compressor(s) shall provide 65% of
standard 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. In-line pressure regulators shall be provided when DCA and
dental LA systems are served by a common compressor. Each laboratory
supply main shall have a pressure regulator. Dryer type may be of either
the mechanical refrigeration or desiccant type, according to project
specific operational requirements and the User's needs. Refer to
9.6.10.3 above and Annex A at the end of this Section for additional
information.
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