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Triple eccentric butterfly valve operating torque

0 views Source: VALTEC China Valve Manufacture CO.,LTD

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)

DNNPS0.6MPa1.0MPa1.6MPa2.5MPa4.0MPa6.3MPa285PSI740PSI1480PSI
502″37
652 1/2″2935608210614269123213
803″345781102148290174271460
1004″ 61102141180259526250395834
1255″104165228289412641283548979
1506″17825045056479010604738252938
2008″2014006018001201156767415033616
25010″35351895612501860269798318875469
30012″63599213521711242831472022250811863
35014″819162322342844406748552520415814123
40016″1047194428423788553364733175627117061
45018″145124513452441264544239786421015
50020″2043328545275769825355311036126551
60024″27795548601894951344360111755938415
70028″6890
75030″323067237700165521265433105
80032″876052877
90036″5275847497502643818078
100040″691511717135602417980219
105042″81351525316270401103400024875
120048″125402056322360389004190036155
135054″183002180629977
140056″2465034900
150060″364403615543397
160064″4085048600
180072″
200080″
220088″
240096″
2600104″
2800112″
3000120″

The above is the torque value of the triple eccentric butterfly valve with different grades and different nominal diameters.-

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