By knowing the lift height, for a start ? ■

Please let us know the material to be handled and lump size ?

thanks ■

Dear Shri M B,

There are different versions of steep angle conveyors, such as belt with herringbone pattern small height projections (for trough shape), belt with big height projection (for trough shape), corrugated side wall with straight projection between the corrugated wall, belt with corrugated wall with bucket shape projection between the corrugations, etc. So, the steep angle conveyor to be designed according to the type of belt.

In general, the belt tractive pull is to be worked out considering the frictional resistances and the lift resistance. This is to be converted into belt tensions T1, T2, T3 and T4, which will enable to select the belt to suit the tensile rating. The belt so selected to be further checked with respect to material support and with respect to specific construction / layout of conveyor, as defined / recommended by the particular make of belt which you intend to use.

Regards,

Ishwar G Mulani.

Author of Book : Engineering Science and Application Design for Belt Conveyors.

Author of Book : Belt Feeder Design and Hopper Bin Silo

Advisor / Consultant for Bulk Material Handling System & Issues.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916 ■

Dear sir,

our company, (Fenner Dunlop) use a fully computerized calculation system. This takes into account all system conditions, drum sizes, local temperature, conveyor length and elevation, as well as many other factors. It is not easy to simply guess at a tensile strength without the full information. Please send through all information you have or call me and we can put all information into the computer togehter. This will give you a true actual requirement of the belt for your systrem

Telephone 0031 512 585 565 (Holland). If I can help you in any way, I will, without obligation.

Stan Holcroft. Regional Manager, Fenner Dunlop B.V. ■

Dear MB

Side wall conveyor calculation requires following

1.0 Belt selection

based on capacity, belt speed, and bulk density you have to check suitablity of existing belt

For checking suitablity of belt clit height , clit spacing , side wall height and distance between side walls are required

For calculating horse power following inputs are required

1.0 Horrizontal length at tail end and head end

2.0 Vetical lift

3.0 capacity

4.0 speed

5.0 Belt weight/ m run

6.0 Idler type , dia , and spacing at different locations

7.0 no and location of of pulleys

These conveyors generally have have screw takeup at tail end

At top vertical curve where carrying side curvature is formed by idlers is very important. These idlers shuld be very carefully designed based on belt tension in that area

these conveyors have drawback of cleaning . sticky/ granular AMaterial stuckup betbeen corrugated walls of belt and spills over the return path

A R SINGH ■

My advice is that you use a better high-angle conveying system. The DSI Snake Sandwich uses two (2) ordinary belts to sandwich the conveyed material in between. A firm but gentle hugging pressure is imparted to contain and develop the natural internal friction of the material. It uses all conventional conveyor hardware (belts troughing idlers, pulleys). Both belts carry the load and belt tensions will be modest for your requirements.

Please visit our web site to learn more. ■

Normally all Steel angle belts the side wall and cleats are vulcanzied on the belt.

We are in a position to offer you belt integrally moulded side wall conveyor belts (one pcs belts) no vulcanizing.

The performance of these belts are 100% better the vulcanized belts.

If you wish to see samples you could visit our office.

Please let me know your interest.

Bhavin Sanghvi.

CBC (INDIA)

Calcutta Belt Centre (Bombay)

152 Narayan Dhuru Street,

Mumbai 400003 India

Mobile:+919820030981

Tel:91-22-23401271 / 3429666 / 23414890

Fax:91-22-23447415 ■

Dear Sir,

We can offer you High Angle Belt with full required engg data.

Please email us your detailed enquiry to avalani@vsnl.com

Our Address :

Avalani Enterprise

23 Strand Road

Kolkata 700001

India

Ph no. 22308215

Regards,

Jigar R Avalani ■

A pocket belt for this application will have a considerably higher lineal mass than the material that it carries. Hence much of the strength requirement comes from carrying its own weight. Such a pocket belt system will be very expensive and the belt replacement cost will approach 30% to 50% of the initial cost of the installation.

The DSI Snake Sandwich High-Angle Conveyor system will be a much better and more economical system. Compared to the corrugated sidwall pocket belt, the Snake belts' strength requirements will be very modest and these are ordinary multi-ply (likely 3 plies) smooth surface rubber belts that can be continuously scraped. Belt replacement cost will be modest. Our system is especially economical in high volume high lift high-angle applications, hence our slogan "THE GREATER THEE LOAD THE HIGHER THE LIFT THE BETTER WE LOOK'.

Visit our website and check out our dSI Snakes.

Joseph A. Dos Santos ■

This mail states that the performance of these belts with integrally moulded side walls is "100% better" than those with vulcanised sidewall & cleats.

If so, how is it that METSO, the undisputed leader of belts in this genre adopts the latter technology ?

Incidentally the quoted mail is silent about whether or not the cleats - which are subjected to greater loads than the sidewalls - too are integrally moulded on.

Could I know what are the pros & cons of properly bonded sidewall & cleats vis-a-vis "integrally moulded" components ? One point I can think of is that, when a sidewall (or cleat) is hot vulcanised on to the mother belt there would be non-uniformity of stretch in the carcass fabric and this could adversely affect tracking of such belts.

Are there any other points or counter points please ? ■

Dear Mr MB,

We are proven manufacturers of Steep angle sidewall belting with internationally recognised technology support.

Since you cannot be PM'ed from this forum, I would request you to PM me so that we may communicate through mail, should you have a requirement for engineering & belt manufacturing support for this type of belt.

Regards

Kayem ■

Mr. RAjeev

Except for initial cost the merits that I have mentioned apply across the full range of volumetric rates.

In terms of initial cost we are most cmpetetive in large, high volume installations. Nevertheless many of our installations are at modest rates using 750 to 1200 mm wide belts. These were not purchased for there low initial cost but they were specified for the other merits and the low operating and maintenance costs.

We have gotten endless inquiries from India. Most of these never reached the stage of making a firm price quotation. I have concluded that there is a structural (bureaucratic) problem.

In conclusion, if initial cost is the sole criteria for your decision then I will advise you to consider our DSI Snakes for the largest highest volume installations. In such cases we will have the lowest initial cost.

Joseph A. Dos Santos ■