Seating Torque for Series 200 Butterfly Valve (N.m)
SIZE
50PSIΔP
100PSIΔP
200PSIΔP
WET
DRY
WET
DRY
WET
DRY
2"
13.5
21.7
14.3
23.0
16.6
26.6
2.5"
14.3
27.1
15.2
28.7
18.9
35.9
3"
21.7
41.2
23.2
43.9
25.3
48.1
4"
34.3
62.7
38.4
70.2
43.7
80.0
5"
53.8
93.5
59.2
103.0
68.1
119.1
6"
83.5
146.8
93.0
163.6
112.6
191.4
8"
150.8
259.3
169.0
290.8
210.7
362.5
10"
236.2
401.5
273.5
464.9
354.8
603.2
12"
345.4
562.9
408.2
665.4
538.7
878.1
NOTE: For Series 100/200 Butterfly Valve
(1) Seat material NBR or EPDM,¦¤P standard disc differential pressure.
(2) The torque values shown on above charts are for wet (water and other non-lubricating media) and dry (non-lubricating , dry gas media)
service. For torques involving other media, please consult the factory.
(3) There is no safety factor included in the numbers shown on these charts. For actuator sizing, VIZA recommends that these values be
multiplied by 1.2 for single valve applications.
(4) For PTFE seats multiply the numbers shown by 2.0.
