Tunstall Macon STV Series Manual page 14

Flow coefficient values (Cv's) at various handwheel settings
Handwheel 2-1/2" 3"
Setting DN 65 DN 80
1.00 8 17
1.25 10 20
1.50 12 22
1.75 15 25
2.00 19 27
2.25 24 30
2.50 30 33
2.75 36 36
3.00 42 40
3.25 47 45
3.50 53 51
3.75 57 58
4.00 62 64
4.25 66 71
4.50 70 77
4.75 74 84
5.00 77 90
5.25 80 97
5.50 82 104
5.75 84 110
6.00 85 115
6.25 87 121
6.50 88 125
6.75 89 128
7.00 89 131
7.25 90 133
7.50 91 134
7.75 92 135
8.00 93 136
8.25
8.50
8.75
9.00
9.25
9.50
9.75
10.00
10.25
10.50
10.75
11.00
11.25
11.50
11.75
12.00
12.25
12.50
12.75
13.00
13.25
13.50
13.75
14.00
Valve is fully open
Optional features and accessories available for this
Macon product are an extra charge, and not included
in the standard model price.
www.maconbalancing.com
Flow Coefficient Values
4" 5" 6" 8"
DN DN DN DN
100 125 150 200
24 81 52 126
27 97 56 162
29 113 59 198
32 129 62 233
35 143 66 274
38 158 70 316
31 171 74 360
48 184 78 401
55 197 81 437
64 209 84 466
73 223 87 488
84 235 92 508
95 247 99 528
106 259 111 547
116 271 124 569
127 282 138 589
137 294 150 610
147 305 158 631
157 317 164 650
167 327 169 667
177 338 175 682
188 347 183 692
197 355 194 700
206 362 211 707
213 368 233 716
219 374 261 727
223 379 292 740
226 384 323 754
229 390 349 767
396 369 780
403 382 791
410 394 799
415 408 802
418 424 801
419 444 798
419 466 795
419 489 796
803
813
824
834
840
842
843
843
- Model STVG
Valve Selection Guide
10" 12"
Valve Size
DN DN
Nominal
250 300
Dimensions
250 298
Inches
303 346
2-1/2
354 452
3
399 448
4 DN 100
444 499
5 DN 125
480 553
6 DN 150
513 618
8 DN 200
543 682
10 DN 250
574 750
12 DN 300
605 819
635 887
Correction for Liquids
668 946
Applies to liquids other than water. Correct the measured
697 995
flow (q) by the density (γ) according to this formula.
722 1025
See Figure 4
745 1045
Sizing a Balancing Valve
764 1064
When the differential pressure and design flow are
780 1091
known, use this formula to calculate Cv value.
792 1131
See Figure 5
802 1183
810 1231
817 1273
825 1303
833 1320
839 1332
846 1343
852 1356
858 1371
864 1384
872 1395
881 1400
892 1404
901 1412
908 1430
Installation Recommendations for
912 1457
GROOVED END VALVE CONNECTIONS
915 1491
917 1526
Grease the pipe ends, valve ends and rubber gasket lip
922 1554
with grease, graphite paste or similar grease. Slip the
929 1567
rubber gasket over the pipe end of each joint. Slide the
939 1570
gasket past the grooves. Position the grooved end valve
between the pipe ends and slide the gaskets back into the
949 1568
central spanned position.
960 1565
969 1565
All products have a flow direction arrow. Make sure that
976 1567
it is pointing in the direction of the flow. Apply grease
983 1571
on the outside of the gasket. Install housing clamps over
989 1575
the gasket - insert bolts and nuts.
1578
1581
Tighten nuts evenly, using socket or other wrench. Tight-
en so that housing clamps come together evenly. The
1584
connection is complete when housing clamps meet metal
1588
to metal. Further tightening of bolts is not necessary.
1592
1598
Pre-assemble large diameter multi-segment housing
1605
clamps loosely and install them as half-housings. Take
1611
up evenly from top to bottom on alternate bolts.
Tunstall Corporation
118 Exchange Street · Chicopee, MA 01013
Phone (413) 594-8695 · Fax (413) 598-8109
Section: Components
14
Nominal Range of Flow
MM GPM (LPH)
DN 65 39 - 87 (9k - 20k)
DN 80 87 - 125 (20k - 28k)
125 - 213 (28k - 48k)
213 - 300 (48k - 68k)
300 - 450 (68k - 102k)
450 - 760 (102k - 173k)
760 - 920 (173k - 209k)
920 - 1500 (209k - 341k)
Bulletin-MB-STVG-0915