Valve to control high-viscosity adhesive??? 1

[flyte]

I am looking for a valve to control the flow of an adhesive with a viscosity of about 50,000 centipoise. I am looking for a low flow rate (maybe 2 gallons/hour) and it needs to be readily adjusted. I have tried a few valves, but I seem to be having trouble with the valve clogging up with adhesive. Would a globe valve be a good choice?

Any advice on this matter would be appreciated.

 

[spud1]

I don't think that using a globe valve would lessen the clogging problem, the flow path through a globe valve is convoluted which would probably increase the clogging effect.

A valve with as close to a straight through flow path would lessen the clogging, also a self cleaning action for the plug would inhibit clogging.

Try an eccentric rotary plug (Camflex type) or a valve used in feedstock on a paper mill like a Neles (Jamesbury) ball valve.Another possibility is a lined pinch type valve (Saunders) however these do not have a great degree of control.

Note with a low flowrate the valve may operate close to the seat so ensure the valve has enough turndown to control your flowrate - I would ask the manufacturer if they have any experience with a fluid viscocity at around 50000Cp.

 

[stanier]

At this flow rate you would be better off with a peistaltic pump with VSD. Sharing knowledge is a way to immortality

 

[keyardee]

We have used conventional ball valves in latex and rubber cement applications with good results.we have improved upon the initial trials by switching over to three piece design ball valves to facilitate easy maintanance.these valves give a clean cut off for the viscus fluids and also clear the crust formed on the downstream side of the ball during the off time.further we have gone for minimum free space type with practically no empty space between the ball and the body.unfortunately we could not do any thing with the ball cavity. hope some body will come out with a solution for this problem also.

 

[cranekiran]

Hi,

Have you tried using a stainless steel Blade with stainless steel seat ring type of gate valve?

 

[Mamajuana]

Hi,
you can take a diaphragm valve. For example look for types 2030, 2031 or 2731 at

http://www.burkert-usa.com