pumping unit is not required for the project, delete
the paragraph.
**************************************************************************
Vacuum pumping unit shall consist of a [single pump, motor, and receiving
tank, [pumps, motors, and other functioning parts in duplicate, and a
single receiving tank, as indicated]]. Unit shall be arranged for
automatic operation. Each pump shall be suitable for the number of square
feet of equivalent direct radiation (EDR) and the discharge pressure
indicated. Receiver shall be a two-compartment type, constructed of
close-grained cast iron with multijet vacuum producers. Pumping unit shall
be close coupled vertical design, bronze-fitted with stainless steel
shafts, enclosed bronze impeller, renewable bronze case ring, and
mechanical shaft seal. Equipment, including pumps, motors, and receiver
shall preferably be mounted on a single base. Accessories shall consist of
a compound gauge, inlet strainer, thermometer, water level gauge with
stopcocks, adjustable vacuum relief valve, air and condensate discharge
check valves, and companion flanges for all flanged connections. Pump
discharge line shall be provided with a check valve and globe valve.
2.3.2.1
Capacity
**************************************************************************
NOTE: The following information will be used as a
guide for information, relative to the capacity of
the vacuum pumping unit.
Vacuum Pump Sizing Guide
(Meters)
A
B
C
D
2,500
3.8
1.3
1.3
5,000
7.5
2.5
2.5
10,000
15.0
5.0
4.0
15,000
22.5
7.5
5.4
20,000
30.0
10.0
6.8
25,000
37.5
12.5
8.3
30,000
45.0
15.0
9.7
40,000
60.0
20.0
12.6
65,000
97.5
32.5
19.8
100,000
150.0
50.0
30.0
Vacuum Pump Sizing Guide
(Inch-Pound)
A
B
C
D
232
0.24
0.08
0.04
465
0.47
0.16
0.07
929
0.95
0.32
0.11
1394
1.4
0.47
0.15
1858
1.9
0.63
0.19
2323
2.4
0.79
0.24
2787
2.8
0.95
0.27
3716
3.8
1.3
0.36
6039
6.2
2.1
0.56
9290
9.5
3.2
0.85
SECTION 15562A
Page 18
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