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Sure Flow Butterfly Valves

Product Options - Technical Information



Gear operator with indicator standard.
Lever with standard lockout


Torque Values (Inch Pounds)

SizeStandard Disc, Differential Pressure
125 psi150 psi200 psi285 psi
BronzePTFEBronzePTFEBronzePTFEBronzePTFE
2"106100117106129111140117
2 1/2"152150166163181176195189
3"213207230220248322265244
4"321290386323450357515390
5"481423598481715540832598
6"6925998786911,0637831,248875
8"1,3261,0601,7161,1832,1061,3072,4961,430
10"2,2391,6713,0101,8723,7802,0744,5502,275
12"3,9592,5684,9532,7955,9483,0236,9423,250
14"4,8812,6406,2263,0707,5703,500  
16"7,0204,2608,5804,88010,1405,500  
18"10,1056,28712,2027,24314,3008,200  
20"13,9238,36016,5829,18019,24010,000  
24"23,61715,42726,95316,81330,29018,200  
30"39,72127,31343,39129,40747,06031,500  

Notes
Manufacturer reserves the right to modify dimensions, materials, or design. Contact factory for certification.

The above torque values are only available for ANSI Class 125 working pressure designed butterfly valves for sizes from 2" to 30".

All torque values shown on chart are for "wet" (water and other non-lubricating medium) on-off service. For "dry" service (non-lubricating, dry gas media), multiply values by 1.6. For "lubricating medium" service (clean, non-abrasive lubricating media), multiply values by 0.85. When sizing actuators for single Valve applications, multiply values by 1.25. When sizing for 3-way ("tee") applications, multiply values by 1.5.

Under certain conditions, hydrodynamic torque can meet or exceed seating and unseating torques. When designing valve systems, hydrodynamic torque must be considered to help ensure correct selection of application.







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