High pressure cycle

[Atul Kumar]

Hi
I am working on a high pressure system with cyclic loading. I need to attain pressures of 350 bars followed by 250 bars in a cyclic manner.One cycle lasts for 1 hour. The working fluid is water and the system volume is not more than 5 liters. I am thinking of using servo valves to obtain this cycle but unable to find one. Can anyone specify a setup to withstand this high pressure?
Thank you

 

[EdStainless]

Is it pure water or can you put additives in it?
There are hydraulic valves rated for 350b.
I am a little concerned about how fast you want to let down pressure and the risk of cavitation in the valves.

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P.E. Metallurgy, Plymouth Tube

 

[LittleInch]

How smooth do you need this to be? That pressure rise with that volume is a very small amount of water if the volume is static?

My thought z s would be a pressuring chamber somewhere issuing a gas cap as the pressurising medium.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[EdStainless]

Good thought LI, air over water is a good way to control this.


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P.E. Metallurgy, Plymouth Tube

 

[Compositepro]

Or use a small, air-driven piston pump to multiply the water pressure 5X and an air pressure regulator to control the pump pressure.

https://www.haskel.com/products/pneumatic-pumps/liquid-pumps/#models_specifications