Re: Flow Pads In Pneumatic Transporter?
Hi brunsonl,
You can certainly try anything at least once in your life. Having neither material spec. nor the experience tends to cause major head aches. Go for it if risk to equipment and people is in proporation to what you will save doing it this way. Otherwise, I would go back to the OEM and ask them if they cannot make the pads for you (sure would help your case if it was a sizable amount that you need). Otherwise you will be stuck with a bit of trial and error scenario, or you could fix the structure to brining it back to within specification. I unfortunately do not know an alternate source for you. ■
Re: Flow Pads In Pneumatic Transporter?
Hi brunsonl,
Most likely the material that you had was polyester that is also used for many pulse-jet dust collector bags. You can get this material from bag manufacturers.
Let me know if you need more help.
Regards,
Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Email: Polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Flow Pad Material
You might investigate a material called VYON(R) sintered plastic fluidization media. It is available from Porvair Filtration Group ( Porvairfiltration.com) and is made of porous sintered plastic - typically polyethylene. It does not fray, does not tear easily and is easier to mount than many types of fabrics or canvas. The VYON fluidization media is available in sheets but also can be made in funnels, cones, discs, pads and special shapes.
Porvair Filtration Group also manufactures sintered stainless steel screens which are an excellent flow pad (fluidization media) for high temperature and other challenging applications. It is extremely rugged and won't fray, tear etc. like polymeric materials and canvas. The mesh, typically stainless steel but also available in other alloys, is comprised of multiple layers of woven mesh sintered together in order to provide controlled, even flow. The material is available in a variety of porosities in low-flow and high-flow grades. It is rugged and also easy to mount, cut, drill, etc. This sintered metal mesh fluidization media is also available in flat sheets, discs, cones, and custom shapes. Unfortunately they don't have a description of the metal pad material on their website, but if you contact them (phone 804-550-1600) they will provide information.
- Joseph
Porvair Filtration Group, Inc.
joseph.bernsley add @porvairfiltration dot com (I broke this up to avoid automated spam)
804-550-1600 ■
Flow Pads in Pneumatic Transporter?
Flow Pads in Dense Phase Pneumatic Transporter?
We have had a failure in a transporter used to unload silica, clay etc. from railcars. In the process of reinstalling the stucture that the flow pads bolt to it will likely no longer match the drawings the transporter manufacturer uses to precut our flow pads when we need them. We will likely have to begin cutting our own flow pads when they require replacement. Is there a standard type of material used for these and any assistance in locating a supplier would be helpfull as well. Currently they are made of some type of nylon or polyester type material. After they are cut and bolt holes punched they use heat to melt the edges to keep it from fraying. It is about 3/8" thick white canvas looking materail, but is of some type of synthetic fiber since it melts.
thanks for any assistance anyone can provide. ■