Re: Hopper Liners
Bonch!
There is a product called TIVAR H.O.T. It has a very low coefficient of friction. Also it has a Maximum Operating Temperature of 135 C.
This material can be welded and sent as a seamless drop in liner.
I hope this helps
Regards
Marcelo Garcia
Poly Hi Solidur ■
Re: Hopper Liners
Please use surface coatings instead of liners. Surface coatings are easier to apply, will give the same performance or better than a liner, and cost less.
My preferred vendor is Wisconsin Protective Coatings Corp.. They sell their coatings by trade name Plasite.
Hope it helps,
A. T. Agarwal
Consultant
Pneumatic Conveying Consultants
polypcc@aol.com
ph and fax: 304 346 5125
www.powderandbulk.com/pcc ■
Re: Hopper Liners
Bonch,
Please can you clarify what you are hoping to achieve by using a low friction liner in your particular application?
If you are aiming to improve drain down efficiency in a core/funnel flow bin - then a surface coating might help you since the contact stresses will probably be quite low (although you have not mentioned what your particulate solids actually is!). The nature of you bulk particulate will be a critical factor in formulating the correct, engineered, approach.
Generally, we would steer away from coated finishes if you are trying to obtain mass flow - since durability is often an issue when flow at the walls is established and maintained over an extended service period. Again, the nature of your application and bulk particulate would indicate the most cost effective route forward.
If you can provide some additional details, it may be possible to give a more helpful response to your question.
Regards
Richard Farnish
The Wolfson Centre for Bulk Solids Handling Technology, Univ.Greenwich, London, UK
mailto: r.j.farnish@gre.ac.uk
URL: http://www.bulksolids.com ■
Xylethon
Bonch,
The product Xylene I believe you are referring to is called Xylethon. It is a product from DuraWear Corporation located in Birmingham, AL.
The properties of this product are as follows:
Softening Point 390 ºF (199 ºC)
Max. Operating Temp.
(application dependent) 332-338 ºF (167-170 ºC)
Coefficient of Friction
(static) .08-.12-- Product WORK HARDENS TO .07
Density .97 g/cm3 Test: D792
Tensile Strength at yield @73ºF is 3,100 PSI; Test: D638
Compressive Strength at 72ºF is 13,000 PSI; Test: LVF1297
Impact Strength:NO BREAK; Test: D256
IZOD Double Notch is 25 ft lbs/in; Test: D256
Hardness 70 Shore D
Elongation at Break 400 %
Water Absortion - NIL
Acid Resistant
Coefficient of Linear Thermal Expansion 1.0 x 10-4 !/K; Test: D696
If you would like to discuss, please contact me.
Steven Mathis
Sales Manager
DuraWear Corporation
steve@durawear.net ■
Hopper liners
Are there any liners that maintain the low friction and are suitable for temperature range 100 to 130 degrees C?
Just read a bit on Xylene? That is not applicable for this range. Are their any more superior products? ■