Hi-pressure low cv control valve 2

[VBO]

I've been trying to find a control valve with an electric or air actuator but I guess the fluid pressure is to hi for a control valve and the cv is too low for a modulated ball valve

The valve must not be in brass or something like it because of the type of fluid we'll be using.

pressure: 2000 psi
cv: 0.05 and less

anybody got an idea ?

 

[TD2K]

How about a Fisher microform or microflute control valve?

I don't have my Fisher cataloge here but they go down to some pretty low Cvs. The main question is: what is your turndown requirement?

 

[jlapp]

The Masoneilan Varipak 28000 series has Cvs ranging from 3.8 to 0.0016. and can handle dp up to 3000psi.

 

[VBO]

I figured out that fisher has a Fisher-Baumann in 316SS, pressure rating is alright 3000 PSIG and CV is hihger than I though at 0,02. We'll be looking foward for Masoneilan. My goal is to control the flow out of a piston pump which has pressure fluctuation of 150 psi at every step even with a pulsation dampener.

 

[Scotsinst]

My advice is, where possible, not to control a reciprocating pump using a control valve.
Use a variable speed drive or vary the stroke length. Proportioning or metering pumps made by Milton Roy etc have adjustable actuators adjusted by a control signal.

 

[davefitz]

I think a swagelock needle valve may be the most cost effective solution.

 

[GGOSCO]

Try contacting GGOSCO Engineering Inc.
They have handled many applications with extremely low Cv requirements and can design a valve to your specific needs.

http://www.ggosco.com

 

[fvincent]

I would follow Scotsinst's advice... don't use a control valve for a positive displacement pump unless you have a 100% recirculation relief system.

fvincent