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[email protected]F-3100 Flow Meter Manual 06/14 - 0670-7 Page 25
3.2.7 Torque Specications
Tighten uniformly in a diagonal sequence as per the table below. Contact ONICON for
torque specications for meters with a nominal diameter larger than 40 inches.
Maximum Flange Bolt Torque Specications in lb-ft (N-m)
Nom. Dia.
(DN)
Class 150 Class 300 PN16 PN25
Polypro Ebonite PTFE Ebonite PTFE Polypro Ebonite PTFE Ebonite PTFE
1” (25) 14 15 24 14 (19) 18 (25) 18 (25)
1¼” (32) 21 19 30 21 (28) 32 (43) 32 (43)
1½” (40) 27 24 46 27 (36) 39 (53) 39 (53)
2” (50) 38 44 26 38 (52) 50 (68) 50 (68)
2½” (65) 55 58 39 55 (75) 66 (90) 33 (45)
3” (80) 30 66 50 30 (41) 39 (53) 39 (53)
4” (100) 41 52 69 41 (56) 44 (59) 61 (83)
5” (125) 52 69 96 52 (71) 57 (77) 83 (112)
6” (150) 78 78 83 78 (106) 80 (108) 100 (135)
8” (200) 319 109 383 131 212 (288) 73 (99) 288 (391) 99 (134)
10” (250) 336 115 398 136 301 (408) 103 (140) 439 (595) 150 (204)
12” (300) 504 173 592 203 376 (510) 129 (175) 434 (588) 148 (201)
14” (350) 698 240 684 235 441 (598) 151 (205) 697 (945) 239 (324)
16” (400) 672 230 884 303 606 (821) 208 (282) 917 (1243) 314 (426)
18” (450) 683 248 856 294 724 (981) 207 (281)
20” (500) 682 234 1000 343 821 (1113) 282 (382)
24” (600) 996 342 1665 571 1223 (1658) 419 (568)
30” (750) 970 333 2377 815
36” (900) 1330 456 3028 1038 1117 (1515) 383 (519)
40” (1000) 1583 543 3439 1179 1553 (2105) 532 (721)
Maximum Flange Bolt Torque Specications in lb-ft
Nom. Dia. (DN) PN10 PN40 PN64
Ebonite PTFE Ebonite PTFE Ebonite
1” (25) 18 (25) 29 (39)
1¼” (32) 32 (43) 39 (53)
1½” (40) 39 (53) 53 (72)
2” (50) 50 (68) 60 (81)
2½” (65) 33 (45) 43 (58)
3” (80) 39 (53) 46 (62)
4” (100) 61 (83) 64 (87)
5” (125) 83 (112) 109 (148)
6” (150) 100 (135) 160 (217)
8” (200) 319 (432) 109 (148) 384 (391) 131 (178)
10” (250) 265 (359) 91 (123) 575 (595) 197 (267)
12” (300) 306 (415) 105 (142) 599 (588) 205 (278)
14” (350) 370 (502) 127 (172) 908 (945) 311 (422)
16” (400) 466 (632) 160 (217) 1331 (1243) 457 (619)
18” (450) 416 (564) 143 (194)
20” (500) 481 (652) 165 (224)
24” (600) 695 (942) 238 (323)
30” (750)
36” (900) 968 (1312) 332 (450)
40” (1000) 1253 (1699) 429 (582)
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