Ball and Butterfly valve design in application for Hydropower industry 1

[SD12]

Hello.

I am interested in design of the ball and butterfly valves that used in hydropower industry. Such valves installed in front of the turbines in hydropower plants. Which standards and/or literature describes the following: Stress analysis of the valve housing, counterweight design and hydraulic design of the valve based on the flow rate?

Thank you in advance,
Sergey

 

[honza1801]

Hello,
The strength analysis is performed, for example, according to EN13445-3.
The size of the counterweight must be determined by the braking force in the hydraulic cylinder.
- The braking force is equal to the closing torque divided by the arm.
- the closing torque is equal to the torque from the counterweight plus the hydraulic torque minus the bearing friction minus the friction from the seal.
- hydraulic torque see. link:

https://met-calc.com/index.php?stranka=sphericalvalve

The minimum and maximum pressures in the hydraulic cylinder must be checked.

 

[SD12]

honza1801

Thank you for reply and comprehensive explanation.

Best regards,
Sergey