PMT Sizing Table

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Inlet
Diameter		 Throat
Diameter		 Beta
Ratio		 Overall
Length		 Outlet
Diameter		 P = Differential Pressure of 100" wc (24.864 kPa)
Water Flow at 60 F (16 C) H = Headloss
 (inches)  (mm)  (inches)  (mm)    (inches)  (mm)  (inches)  (mm) US
GPM		 US
MGD		 LPS m3/d  RD(10-3)  in.
wc		 kPa
3.000 76.2 1.609 40.9 0.5363 7.35 187 2.50 64 128.02 0.184 8.08 697.86 121 4.1 1.02
3.000 76.2 1.798 45.7 0.5993 6.65 169 2.55 65 160.16 0.231 10.10 873.01 151 3.7 0.92
3.000 76.2 2.171 55.1 0.7237 5.25 133 2.70 69 239.64 0.345 15.12 1306.29 226 2.9 0.73
4.000 101.6 1.750 44.5 0.4375 11.35 288 3.30 84 152.57 0.220 9.63 831.68 108 5.0 1.25
4.000 101.6 2.203 56.0 0.5508 9.15 232 3.35 85 239.98 0.346 15.14 1308.12 170 4.0 0.99
4.000 101.6 2.814 71.5 0.7035 6.80 173 3.60 91 399.78 0.576 25.22 2179.22 282 3.1 0.76
6.000 152.4 2.529 64.2 0.4215 16.25 413 4.85 123 319.37 0.460 20.15 1740.86 150 5.3 1.31
6.000 152.4 3.114 79.1 0.5190 14.00 356 5.00 127 479.75 0.691 30.27 2615.10 226 4.2 1.05
6.000 152.4 4.000 101.6 0.6667 9.75 248 5.20 132 800.08 1.152 50.48 4361.26 377 3.3 0.82
6.000 152.4 4.428 112.5 0.7380 9.25 235 5.60 142 1002.89 1.444 63.27 5466.74 472 2.8 0.71
8.000 203.2 3.466 88.0 0.4333 21.00 533 4.85 123 598.84 0.862 37.78 3264.27 211 5.1 1.27
8.000 203.2 4.018 102.1 0.5023 19.00 483 5.00 127 799.35 1.151 50.43 4357.27 282 4.3 1.08
8.000 203.2 4.919 124.9 0.6149 15.50 394 5.20 132 1200.38 1.729 75.73 6543.25 424 3.6 0.90
8.000 203.2 5.978 151.8 0.7473 11.60 295 5.60 142 1835.83 2.644 115.82 10007.10 648 2.8 0.69
10.000 254.0 3.991 101.4 0.3991 27.50 699 8.00 203 798.27 1.150 50.36 4351.38 226 5.7 1.41
10.000 254.0 4.919 124.9 0.4919 24.00 610 8.35 212 1198.83 1.726 75.63 6534.83 339 4.4 1.10
10.000 254.0 6.343 161.1 0.6343 17.00 432 8.65 220 2000.64 2.881 126.22 10905.48 565 3.5 0.87
10.000 254.0 6.907 175.4 0.6907 13.75 349 18.65 474 2399.48 3.455 151.38 13079.57 678 3.2 0.79
12.000 304.8 4.892 124.3 0.4077 32.00 813 9.70 246 1197.62 1.725 75.56 6528.24 282 5.5 1.37
12.000 304.8 6.966 176.9 0.5805 24.50 622 10.50 267 2401.22 3.458 151.49 13089.04 565 3.8 0.95
12.000 304.8 8.000 203.2 0.6667 18.75 476 10.80 274 3200.34 4.608 201.91 17445.02 753 3.3 0.82
14.000 355.6 4.900 124.5 0.3500 40.50 1029 11.00 279 1215.55 1.750 76.69 6625.95 245 6.9 1.72
14.000 355.6 5.600 142.2 0.4000 38.00 965 11.25 286 1571.43 2.263 99.14 8565.86 317 5.7 1.41
14.000 355.6 6.958 176.7 0.4970 31.50 800 11.55 293 2397.87 3.453 151.28 13070.78 484 4.4 1.09
14.000 355.6 8.044 204.3 0.5746 28.50 724 12.15 309 3201.12 4.610 201.96 17449.26 646 3.9 0.96
14.000 355.6 9.757 247.8 0.6969 24.00 610 13.80 351 4796.68 6.907 302.62 26146.69 968 3.1 0.78
14.000 355.6 10.328 262.3 0.7377 20.00 508 13.00 330 5455.25 7.856 344.17 29736.52 1101 2.8 0.71
16.000 406.4 6.932 176.1 0.4333 40.90 1039 13.10 333 2395.36 3.449 151.12 13057.09 423 5.1 1.27
16.000 406.4 8.036 204.1 0.5023 37.00 940 13.50 343 3197.41 4.604 201.73 17429.08 565 4.3 1.08
16.000 406.4 9.838 249.9 0.6149 25.90 658 13.35 339 4801.51 6.914 302.93 26173.02 848 3.6 0.90
16.000 406.4 11.255 285.9 0.7034 22.90 582 14.30 363 6395.28 9.209 403.48 34860.64 1129 3.1 0.77
18.000 457.2 8.011 203.5 0.4451 45.00 1143 14.80 376 3194.15 4.600 201.52 17411.30 501 4.9 1.23
18.000 457.2 8.984 228.2 0.4991 41.65 1058 15.15 385 3997.05 5.756 252.17 21787.88 627 4.4 1.08
18.000 457.2 9.849 250.2 0.5472 38.30 973 15.50 394 4796.52 6.907 302.61 26145.79 753 4.0 1.00
18.000 457.2 11.35 288.3 0.6306 27.40 696 15.35 390 6402.53 9.220 403.94 34900.14 1005 3.5 0.88
18.000 457.2 12.592 319.8 0.6996 28.50 724 16.50 419 7995.36 11.513 504.43 43582.66 1255 3.1 0.77
18.000 457.2 12.618 320.5 0.7010 28.35 720 16.50 419 8031.95 11.566 506.74 43782.08 1261 3.1 0.77
20.000 508.0 7.000 177.8 0.3500 57.00 1448 15.75 400 2480.80 3.572 156.51 13522.81 350 6.9 1.72
20.000 508.0 8.959 227.6 0.4480 49.95 1269 16.50 419 3993.44 5.751 251.95 21768.23 564 4.9 1.22
20.000 508.0 9.839 249.9 0.4920 46.70 1186 16.80 427 4796.26 6.907 302.60 26144.36 678 4.4 1.10
20.000 508.0 11.377 289.0 0.5689 40.90 1039 17.35 441 6402.11 9.219 403.91 34897.88 904 3.9 0.97
20.000 508.0 13.813 350.9 0.6907 31.70 805 18.20 462 9596.26 13.819 605.43 52309.16 1356 3.2 0.79
24.000 609.6 9.783 248.5 0.4076 62.90 1598 19.45 494 4789.55 6.897 302.17 26107.81 564 5.5 1.37
24.000 609.6 11.349 288.3 0.4729 57.65 1464 20.35 517 6391.31 9.203 403.23 34838.97 752 4.6 1.14
24.000 609.6 13.931 353.8 0.5805 45.50 1156 20.45 519 9603.49 13.829 605.89 52348.54 1131 3.8 0.95
24.000 609.6 16.000 406.4 0.6667 33.50 851 20.55 522 12801.35 18.434 807.64 69780.09 1507 3.3 0.82
24.000 609.6 17.677 449.0 0.7365 33.50 851 20.25 514 15972.51 23.000 1007.71 87066.06 1880 2.9 0.71
30.000 762.0 11.265 286.1 0.3755 82.30 2090 23.90 607 6388.62 9.200 403.06 34824.32 602 6.2 1.54
30.000 762.0 12.645 321.2 0.4215 77.30 1963 24.40 620 7984.15 11.497 503.72 43521.56 752 5.3 1.31
30.000 762.0 16.086 408.6 0.5362 64.60 1641 25.70 653 12796.05 18.426 807.31 69751.20 1205 4.1 1.02
30.000 762.0 17.975 456.6 0.5992 57.60 1463 26.35 669 16006.49 23.049 1009.85 87251.26 1507 3.7 0.92
30.000 762.0 21.711 551.5 0.7237 43.20 1097 27.75 705 23966.72 34.512 1512.07 130642.44 2257 2.9 0.73
36.000 914.4 13.806 350.7 0.3835 96.00 2438 28.70 729 9580.44 13.796 604.43 52222.91 752 6.0 1.50
36.000 914.4 16.022 407.0 0.4451 89.50 2273 29.65 753 12776.60 18.398 806.08 69645.18 1003 4.9 1.23
36.000 914.4 19.705 500.5 0.5474 75.90 1928 31.00 787 19199.71 27.648 1211.31 104657.48 1507 4.0 1.00
36.000 914.4 22.004 558.9 0.6112 67.20 1707 31.85 809 24011.01 34.576 1514.86 130883.85 1884 3.6 0.91
36.000 914.4 25.183 639.6 0.6995 55.10 1400 33.00 838 31978.64 46.049 2017.54 174315.31 2510 3.1 0.77
42.000 1066.8 22.023 559.4 0.5244 91.90 2334 35.85 911 23991.09 34.547 1513.60 130775.25 1614 4.2 1.04
42.000 1066.8 25.414 645.5 0.6051 79.40 2017 37.05 941 32011.92 46.097 2019.64 174496.77 2153 3.7 0.91
42.000 1066.8 30.664 778.9 0.7301 59.00 1499 38.95 989 47931.20 69.021 3023.99 261272.64 3224 2.9 0.72
48.000 1219.2 19.567 497.0 0.4076 125.50 3188 38.85 987 19160.10 27.591 1208.81 104441.57 1128 5.5 1.37
48.000 1219.2 25.437 646.1 0.5299 103.90 2639 41.05 1043 32001.03 46.081 2018.95 174437.38 1884 4.1 1.03
48.000 1219.2 31.045 788.5 0.6468 82.90 2106 43.05 1093 48015.77 69.143 3029.32 261733.63 2826 3.4 0.85
 48.000   1219.2   35.353    898.0    0.7365   69.50   1765   45.00   1143    63885.85    91.996    4030.57     348241.34    3760   2.9   0.71 
     
This sizing table can be used as a guide to aid the user in choosing the proper PMT for a given application.  Depending on the details of that application, a more appropriate selection, or a more accurate estimation of the performance of a given selection, may be available.  Wyatt Engineering encourages users to contact their local Wyatt representatives, or call us directly, for definitive sizing information.
     
Incompressible
Flow Relationships:		 Examples:
For a 30.00" x 21.711" PMT, find  		Solutions: Found using the
"Incompressible Flow Relationships"
     
PN = 100 (QN / Q)2 P at 50 000 US GPM PN = 100 (50 000 / 23 966.72)2 = 435.23" wc
HN = H (QN / Q)1.88 H at 50 000 US GPM HN = 2.9 (50 000 / 23 966.72)1.88 = 11.6" wc
QN = Q (P / 100)0.5 QN at 750" wc QN = 23 966.72 (750 / 100)0.5 = 65 635.57 US GPM
     
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