//A. Provide automatic alternating duplex vacuum producers,
installed in parallel, turbine-type, each capable of carrying
70 percent of the design load. Locate remote from dental
facilities at an elevation lower than UJCs. Gardner-Denver-
Lamson Inc., or equal. //
//A. Provide duplex high efficiency continuous duty, positive
displacement or sealed rotary vane pumps with automatic
continuous oil flow to all moving parts. System shall be
RAMVAC are equal.//
B.
Combine exhausts into a common pipe sized for one vacuum
producer. Discharge exhaust pipe to outdoors above roof of
portion of building in which located. Do not discharge within
a 3000 mm (10 foot) radius of any door, window, air intake or
ventilating opening.
C.
Increase air flow demand as follows to compensate for friction
losses:
UJC
Percent
Increase
9 to 20
10
21 to 44
15
D.
Select vacuum producer as follows:
L/min @ 1 Pa
kW
SCFM @ 8 inches of Mercury
Hp
173
5.6
165
7.5
230
7.5
220
10
367
11.2
350
15
498
14.9
475
20
630
18.6
600
25
E.
Separator: Install ahead of each vacuum producer. Quantity and
size shall be as follows:
UJC
Quantity
Size L (gallon)
6
2
75 (20) each
7-10
2
150 (40) each
11 and above
2
300 (80) each
14.6
Provide solenoid valve on the cold water supply to the Utility
Junction Centers in the dental area.
15.
DENTAL COMPRESSED AIR SYSTEM
Design central piped dental compressed air distribution system in
accordance with current editions of NFPA 99, Compressed Gas Association
Standards, VA Master Specification 15481, and the following:
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