Actuator and Valve Question

It looks as though some concepts are being mixed here. As for the 24" valve, what does the 19 bar specification represent? Line pressure, ΔP, or other? Also, I would be very leery of pneumatic actuation on such a valve. If there is a rough spot in its operation, an increase in the actuator pressure might slam the valve closed suddenly, risking liquid hammer.

Tornado , please abolish the 19 bar . The valve bto is 12500 NM . How much supply pressure do the actuator need to meet bto valve 12500 nm ?thanks

Minimum Pressure of 120 bar means that is the minimum pressure to operate on its specified torque and maybe to operate smoothly.

Reducing the pressure will reduce the developed NM torque, but also, it might not operate smoothly. Check with manufacturer or experiment!

I am just curious.

You say it is a pneumatic actuator and the design pressure is 175 bar and operating pressure is 120/150 bar.

Where are you getting this high pressure from.Are you using pipline gas,and what make actuators are these.

Thanks

Hi Sarah,

To get some kind of answer, we need to know the valve specs. If you have them in a pdf, you might be able to copy them and paste them right into the edit box here.

We would then have a much better idea of what you are dealing with.

If the actuator is pneumatic, I would think that standard plant air (6-7 barg) would be sufficient, even though your process pressure is much higher.

Mike

120 x 12550/27594 ≈ 54.6 bar, so in theory that might work; however, the actuator specification seems to call for 120 bar. This is unusually high, in my experience.

This is unusually high, in my experience.

My thoughts exactly, it is why I have refrained from posting anything. I do valves, pumps, piping, etc all the time and have never seen a pneumatic actuator that requires that high of a pressure to operate.

Sarah, which brand of valve are you using? What type of system is this for?

you should talk to the producer of the actuator! Do not try to get answer from anybody else as this can blown your equipment to pieces.