Butterfly valve torque force DN300 and DN350
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Is the torque required for the DN350 150LB electric triple-eccentric butterfly valve the same as that for the DN300 150LB electric triple-eccentric butterfly valve? Can the torque value intended for the DN350 model be used with the DN300 model?
Can a professional explain this to me?
The stem torque of a valve is more influenced by the flow rate of the medium and the pressure difference between the upstream and downstream sides; it cannot be determined solely based on the valve size, as calculations are necessary.
The shaft torque for DN300 valves is 1500 N.m, while that for DN350 valves is 2200 N.m. This is for reference only; it is possible to use a value suitable for a larger diameter valve on a smaller one, but not the reverse
It depends on the torque capacity of the actuator mechanism you use. Generally, for 300-size hard-sealed triple-eccentric butterfly valves, we use 2000 NM actuator mechanisms; these can also be used with 350-size hard-sealed triple-eccentric butterfly valves
As long as the receiving size is the same. That will do. But the 350 model can replace the 300 model. The reverse does not work.