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, AMERICAN SOQETYOF HEMNG&
VENTILATING ENGINEERS GDIDZ1923j
TABLE 41a. RECIPROCATING VACUUM PUMPS
Maximum Speed for Steam Driven Pumps
Length of Stroke Inches
Number of Single Strokes
per Min.
Piston Speed Ft. per Min. S.
Length of Stroke Inches
Number of Single Strokes
per Min.
Piston Speed Ft. per Min. S.
3 100 4 90 5 84 6 80 7 69
8 67K 10 60
25 30 35 40 40 45 50
12 60 60
14 57 66'A 15 56 70 16 55 73 18 53 80 20 51 85
22 49 90
Maximum Speed for Power Driven Pumps
Length of Rev. per
Single
Stroke Min. Crank Strokes per
Inches
Shaft
Min.
Piston
Speed Ft. per Min.
S.
Length of'
Stroke Inches
Rev. Per Min. Crank
Shaft
Single
Strokes per Min.
Piston
Speed Ft. per Min.
S.
3 80 5 50 6 50 8 50
160 40 100 42 100 50 100 67
10 40 80 67
12 40 80 80 16 30 60 80 20 25 50 83
Use Mfg. Speed when equal or less than above.
Gross Capacity in Gallons of Pump Cylinders per Foot Piston Speed
Dia. Cylinder Inches
Gal. per FootG
Dia. Cylinder Inches
Gal. per FootG
Dia. Cylinder Inches
Gal. per Foot G
2
.1632
6K 1.724
13
6.895
2A
.2550
63A 1.859
13K
7.436
3
.3672
7
1.999
14
7.996
3M
.4309
m 2; 145
1*K
8.578
3H
.4998
m 2.295
15
9.180
3%
.5738
w 2.450
15K
9.801
4
.6528
8
2.611
16
10.44
4K
4K 1%
.7369 .8263 .9206
m 2.948 9 3.305 9K 3.682
17 18 19
11.79 13.32 14.73
5
1.020
10
4.080
20
16.32
5K 1.125 5K 1.234
toA u
4.498 4.937
21 22
17.99 19.75
1.349
UK
5.396
23
21.58
6
1.469
12
5.875
24
23.50
6H
1.594
12M
6.375
25
25.50
Empirical Formula
Gy. SX W=capacity sq. ft. direct radiation
G=capacity water cylinder in gal. per ft. length. 5=piston speed in ft. per min.
constant--105 for 6 in. and less--120 for over 6-in. cylinder 56
TABLE 42. PUMP DATA
Altitude
Barometric Pressure
Equivalent Head of Water in Ft.
Sea level W mile above
h :: % ;;
*;
l'A " IK "
2"
" "
14.70 lb. to sq. in.
14.02 13.33 12.66 12.02 11.42
" " " " "
U
*4
<1
((
It
II
(<
10.88 "
9.88 "
33.95 32.38 30.79 29.24 27.76 26.38 25.13 22.82
Practical Suction Lift
22' 21' 20' 18' 17' 16' 15' 14'
Suction lift of pumps WITH BAROMETRIC PRES SURE AT DIFFERENT ALTI TUDES AND EQUIVALENT HEAD OF WATER IN FEET.
TABLE 43. PROPERTIES OF SATURATED STEAM
Vacuum in in. of Mercury or Gage Pressure in lb.
A BSOLUTE Pressure in Temperature LB. PER SQ. in deg. pahr. IN.
Total Heat above 32 deg. fahr.
B.t.u. in the B.t.u. in the
Water
Steam
Latent Heat of the Steam IN B.T.U.
Volume in CU. FT. OF 1 LB. OF Steam
27.88 25.85 23.81 21.78 19.74 17.70 15.67 13.63 11.60 9.56
7.52 5.49 3.45 1.42
--
1.
2. 3. 4. 5. 6. 7. 8. . 9. 10. 11. 12. 13. 14.
-
101.83 126.15 141.52 153.01 162.28 170.06 176.85 182.86 188.27 193.22 197.75 201.96 205.87 - 209.55
69.8 94.0 109.4 120.9 130.1 137.9 144.7 150.8 156.2 161.1 165.7 169.9 173.8 177.5
1104.4 1115.0 1121.6 1126.5 1130.5 1133.7 1136.5 1139.0 1141.1 " 1143.1
1144.9 1146.5 ' 1148.0 1149.4
1034.6 1021.0 1012.3 1005.7 1000.3 995.8 991.8 988.2 985.0 982.0 979.2 976.6 974.2 971.9
333.0 173.5 118.5 90.5 73.33 61.89
53.56 47.27 42.36 38.38
35.10 32.36 30.03 28.02
57