Triple eccentric butterfly valve operating torque
VALTECCN butterfly valve manufacturers share the operating torque knowledge of triple eccentric butterfly valves: The operating torque of the triple eccentric butterfly valve is calculated based on normal temperature and clean medium. For high temperature, low temperature and non-clean media, the operating torque of the triple eccentric butterfly valve will increase.
During the opening and closing process of the triple eccentric butterfly valve, the required opening and closing force and opening and closing torque vary, and the maximum value is at the final moment of closing or the initial moment of opening. There are special requirements for the speed of the opening and closing process in some special conditions.
Torque calculation of triple eccentric butterfly valve
One-half the square of the diameter of the three-eccentric butterfly valve × 3.14 is the area of the valve plate, and then multiplied by the bearing pressure (that is, the working pressure of the three-eccentric butterfly valve) to obtain the static pressure on the shaft, multiplied by the friction coefficient (go to check In the table, the friction coefficient of steel is generally 0.1, and the friction coefficient of steel to rubber is 0.15), multiplied by the shaft diameter and divided by 1000 to obtain the torque number of the triple eccentric butterfly valve, the unit is N m, the electric device and the pneumatic actuator refer to the safety value Take 1.5 times the torque of the triple eccentric butterfly valve.
The torque value of triple eccentric butterfly valve is as follows (for reference only)
| DN | NPS | 0.6MPa | 1.0MPa | 1.6MPa | 2.5MPa | 4.0MPa | 6.3MPa | 285PSI | 740PSI | 1480PSI |
| 50 | 2″ | – | – | 37 | – | – | – | – | – | – |
| 65 | 2 1/2″ | 29 | 35 | 60 | 82 | 106 | 142 | 69 | 123 | 213 |
| 80 | 3″ | 34 | 57 | 81 | 102 | 148 | 290 | 174 | 271 | 460 |
| 100 | 4″ | 61 | 102 | 141 | 180 | 259 | 526 | 250 | 395 | 834 |
| 125 | 5″ | 104 | 165 | 228 | 289 | 412 | 641 | 283 | 548 | 979 |
| 150 | 6″ | 178 | 250 | 450 | 564 | 790 | 1060 | 473 | 825 | 2938 |
| 200 | 8″ | 201 | 400 | 601 | 800 | 1201 | 1567 | 674 | 1503 | 3616 |
| 250 | 10″ | 353 | 518 | 956 | 1250 | 1860 | 2697 | 983 | 1887 | 5469 |
| 300 | 12″ | 635 | 992 | 1352 | 1711 | 2428 | 3147 | 2022 | 2508 | 11863 |
| 350 | 14″ | 819 | 1623 | 2234 | 2844 | 4067 | 4855 | 2520 | 4158 | 14123 |
| 400 | 16″ | 1047 | 1944 | 2842 | 3788 | 5533 | 6473 | 3175 | 6271 | 17061 |
| 450 | 18″ | 1451 | 2451 | 3452 | 4412 | 6454 | – | 4239 | 7864 | 21015 |
| 500 | 20″ | 2043 | 3285 | 4527 | 5769 | 8253 | – | 5531 | 10361 | 26551 |
| 600 | 24″ | 2779 | 5548 | 6018 | 9495 | 13443 | – | 6011 | 17559 | 38415 |
| 700 | 28″ | – | – | 6890 | – | – | – | – | – | – |
| 750 | 30″ | 3230 | 6723 | 7700 | 16552 | – | – | 12654 | 33105 | – |
| 800 | 32″ | – | – | 8760 | – | – | – | – | 52877 | – |
| 900 | 36″ | 5275 | 8474 | 9750 | 26438 | – | – | 18078 | – | – |
| 1000 | 40″ | 6915 | 11717 | 13560 | – | – | – | 24179 | 80219 | – |
| 1050 | 42″ | 8135 | 15253 | 16270 | 40110 | 34000 | – | 24875 | – | – |
| 1200 | 48″ | 12540 | 20563 | 22360 | 38900 | 41900 | – | 36155 | – | – |
| 1350 | 54″ | 18300 | 21806 | 29977 | – | – | – | – | – | – |
| 1400 | 56″ | 24650 | – | 34900 | – | – | – | – | – | – |
| 1500 | 60″ | 36440 | 36155 | 43397 | – | – | – | – | – | – |
| 1600 | 64″ | 40850 | – | 48600 | – | – | – | – | – | – |
| 1800 | 72″ | – | – | – | – | – | – | – | – | – |
| 2000 | 80″ | – | – | – | – | – | – | – | ||
| 2200 | 88″ | – | – | – | – | – | – | – | – | – |
| 2400 | 96″ | – | – | – | – | – | – | – | – | |
| 2600 | 104″ | – | – | – | – | – | – | – | – | – |
| 2800 | 112″ | – | – | – | – | – | – | – | – | – |
| 3000 | 120″ | – | – | – | – | – | – | – | – | — |
The above is the torque value of the triple eccentric butterfly valve with different grades and different nominal diameters.-
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