VARIABLE SPRING SUPPORTS

Variable Spring Units are devices used to support pipework which is subject to moderate vertical displacement due to temperature changes or subsidence.

  • Standard Galvanised Carbon Steel, with multi coat finishes available on request.
  • Apropriate for 25% maximum load variations only.
  • Vertical displacements up to 75mm only, for displacements greater than that, please use Constant Springs instead.
  •  Variable springs are available in 8 top suspensions and 1 floor mounted pedestal type
  • The variable spring units are available in 4 working ranges; AG680 (35mm) AG700 (70mm), AG720 (140mm) and AG740 (210mm). 
  •  Hydro 
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QUOTE THIS PRODUCT

SELECTION TABLES - Loads in Kg

AG740 AG720 AG700 AG680 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
Over Travel 30 20 10 5 20 29 38 49 66 88 118 158 211 282 366 479 634 845 1127 1521 2113 2818 3752 4983 6625 8806 11744
20.5 30.5 39 51 68 91 121 162 216 289 376 491 650 867 1155 1560 2167 2889 3847 5109 6793 9029 12042
21 31 40 52 70 93 124 166 222 296 385 503 666 888 1184 1599 2221 2960 3942 5236 6961 9252 12340
21.5 32 41 53 71 95 127 170 227 303 394 515 682 909 1213 1637 2274 3032 4037 5362 7129 9475 12637
22 32.5 42 54 73 97 130 174 232 310 403 528 698 931 1241 1676 2328 3103 4132 5489 7297 9699 12935
0 0 0 0 22.5 33.5 43 56 75 100 133 178 238 317 413 540 714 952 1270 1714 2381 3175 4227 5615 7465 9922 13233
30 20 10 5 23 34.5 44 57 76 102 136 182 243 324 422 552 730 974 1298 1753 2435 3246 4322 5742 7633 10145 13531
23.5 35 45 58 78 104 139 186 248 332 431 564 746 995 1327 1791 2488 3318 4417 5868 7801 10368 13828
24 36 46 59 80 107 142 190 254 339 441 576 762 1017 1355 1830 2542 3389 4512 5995 7968 10592 14126
24.5 36.5 47 61 81 109 145 194 259 346 450 588 779 1038 1384 1869 2596 3461 4607 6121 8136 10815 14424
25 37.5 48 62 83 111 148 198 265 353 459 600 795 1059 1413 1907 2649 3532 4702 6247 8304 11038 14721
60 40 20 10 25.5 38 49 63 85 113 151 202 270 360 468 613 811 1081 1441 1946 2703 3603 4797 6374 8472 11261 15019
26 39 50 64 87 116 154 206 275 367 478 625 827 1102 1470 1984 2756 3675 4892 6500 8640 11485 15317
27 39.5 50.5 66 88 118 157 210 281 374 487 637 843 1124 1498 2023 2810 3746 4987 6627 8808 11708 15614
27.5 40.5 51.5 67 90 120 160 214 286 382 496 649 859 1145 1527 2061 2863 3818 5082 6753 8976 11931 15912
28 41 52.5 68 92 122 163 218 291 389 506 661 875 1167 1556 2100 2917 3889 5177 6880 9144 12154 16210
90 60 30 15 28.5 42 53.5 69 93 125 166 222 297 396 515 673 891 1188 1584 2139 2971 3961 5272 7006 9311 12378 16508
29 42.5 54.5 71 95 127 169 226 302 403 524 685 907 1209 1613 2177 3024 4032 5367 7133 9479 12601 16805
29.5 43.5 55.5 72 97 129 172 230 307 410 533 698 923 1231 1641 2216 3078 4103 5462 7259 9647 12824 17103
30 44 56.5 73 98 131 175 234 313 417 543 710 939 1252 1670 2254 3131 4175 5557 7386 9815 13047 17400
30.5 45 57.5 74 100 134 178 238 318 424 552 722 955 1274 1698 2293 3185 4246 5652 7512 9983 13271 17698
120 80 40 20 31 45.5 58.5 76 102 136 181 242 323 432 561 734 971 1295 1727 2331 3239 4318 5747 7638 10151 13494 17996
31.5 46.5 59.5 77 103 138 184 246 329 439 571 746 988 1317 1756 2370 3292 4389 5843 7765 10319 13717 18294
32 47 60.5 78 105 140 187 250 334 446 580 758 1004 1338 1784 2409 3346 4461 5938 7891 10487 13940 18591
32.5 48 61.5 79 107 143 190 254 340 453 589 771 1020 1359 1813 2447 3399 4532 6033 8018 10655 14164 18889
33.5 48.5 62.5 81 108 145 193 258 345 460 598 783 1036 1381 1841 2486 3453 4604 6128 8144 10822 14387 19187
150 100 50 25 34 49.5 63.5 82 110 147 196 262 350 467 608 795 1052 1402 1870 2524 3506 4675 6223 8271 10990 14610 19484
34.5 50 64 83 112 149 199 266 356 474 617 807 1068 1424 1898 2563 3560 4746 6318 8397 11158 14833 19782
35 51 65 84 113 152 202 270 361 482 626 819 1084 1445 1927 2602 3614 4818 6413 8524 11326 15057 20080
35.5 51.5 66 86 115 154 205 274 366 489 636 831 1100 1497 1956 2640 3667 4889 6508 8650 11494 15280 20378
36 52.5 67 87 117 156 208 278 372 496 645 843 1116 1488 1984 2679 3721 4961 6603 8776 11662 15503 20675
180 120 60 30 36.5 53 68 88 118 158 211 282 377 503 654 856 1132 1509 2013 2717 3774 5032 6698 8903 11830 15726 20973
37 54 69 89 120 161 214 286 382 510 664 868 1148 1531 2041 2756 3828 5104 6793 9029 11988 15950 21271
37.5 54.5 70 91 122 163 217 290 388 517 673 880 1164 1552 2070 2794 3881 5175 6888 9156 12166 16173 21568
38 55.5 71 92 123 165 220 294 393 524 682 892 1180 1574 2098 2833 3935 5247 6983 9282 12333 16396 21866
38.5 56 72 93 125 167 223 298 398 532 691 904 1196 1595 2127 2872 3989 5318 7078 9409 12501 16619 22164
210 140 70 35 39 57 73 94 127 170 226 302 404 539 701 916 1213 1617 2156 2910 4042 5389 7173 9535 12669 16843 22461
39.5 57.5 74 96 128 172 229 306 409 546 710 928 1229 1638 2184 2949 4096 5461 7268 9662 12837 17066 22759
40 58.5 75 97 130 174 232 310 415 553 719 941 1245 1660 2213 2987 4149 5532 7363 9788 13005 17289 23057
40.5 59 76 98 132 176 235 314 420 560 729 953 1261 1681 2241 3026 4203 5604 7458 9915 13173 17512 23354
41.5 60 77 99 134 179 238 318 425 567 738 965 1277 1702 2270 3064 4257 5675 7553 10041 13341 17735 23652
Over Travel 30 20 10 5 42 60.5 77.5 101 135 181 241 322 431 574 747 977 1293 1724 2298 3103 4310 5747 7648 10167 13509 17959 23950
42.5 61.5 78.5 102 137 183 244 326 436 582 756 989 1309 1745 2327 3142 4364 5818 7743 10294 13676 18182 24248
43 62 79.5 103 139 185 247 330 441 589 766 1001 1325 1767 2356 3180 4417 5889 7838 10420 13844 18405 24545
43.5 63 80.5 104 140 188 250 334 447 596 775 1013 1341 1788 2384 3219 4471 5961 7933 10547 14012 18629 24843
44 64 81.5 106 142 190 253 338 452 603 784 1026 1357 1810 2413 3257 4524 6032 8028 10673 14180 18852 25141
Spring Rate - Kg per Millimetre
AG680 0.53 0.75 0.96 1.25 1.6 2.2 3 4 5.4 7.1 9.2 12.1 16 21.4 28.6 38.6 53.6 71.4 95 126.4 168 223.2 297.6
AG700 0.26 0.37 0.48 0.62 0.8 1.1 1.5 2 2.7 3.6 4.6 6 8 10.7 14.3 19.3 26.8 35.7 47.5 63.2 84 111.6 148.8
AG720 0.13 0.18 0.24 0.31 0.4 0.5 0.7 1 1.3 1.8 2.3 3 4 5.3 7.1 9.6 13.4 17.8 23.7 31.6 42 55.8 74.4
AG740 0.09 0.12 0.16 0.21 0.27 0.37 0.5 0.67 0.9 1.2 1.53 2 2.67 3.57 4.77 6.43 8.93 11.9 15.83 21.07 28 37.2 49.6
Size 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22