Changing the actuator of ON/OFF valves. We have many on/off valve in our gas treatment plant and some actuators were damaged and need to use spare parts for some of them and some item we will replace

A triple offset valve is a rotary, butterfly-style valve. A standard butterfly has no offset: THe shaft and vane are coincident with the centerline of the pipe.

Is a check valve necessary after the control valve? If so what type is typically used? I was considering a swing check because it has low air flow restriction but has to be mounted horizontally and ta

What is the best way to design the piping manifold so the flow to each bundle shall be as equal as possible by symmetrical piping only (the operating conditions are 80 deg C and 2 barg).

Best solution would be to buy a valve with an anti-cavitation trim.There is a fundamental problem with using anticavitation valves on raw water, which is this application.

The butterfly valve disc always has an angle when it is seating on the seat. It is impossible to make valve disc zeron degree alignment on the seat.

The standard way to calculate dynamic torque is to run a flow test and measure the torque required to rotate the valve at each position.

I recommend you download a vendor program . Use the FL and Xt factors for your particular make of butterfly valve and you can calculate the valve openings for different flowrates.