rotator
Powder and Bulk Engineering
Saturday, August 23, 2014
Skip Navigation LinksHome) Item Details
Powder and Bulk Engineering is a technical publication devoted to readers in the bulk solids market, worldwide.
Technical Articles
   
Item Details:
Publication Date: 12/1991
Pages: 5
Medium:
PDF Format
US:
$7.50
Related Item(s):
Author(s):
Recommended Item:
Volumetric feeding: Six common methods

Volumetric feeding is based on an invention more than 2,300 years old: Archimedes' screw. Though developed to move water, Archimedes' screw was adapted in the late 19th century to move dry materials; later, the screw was also used to feed dry materials by controlling their flow. Today, several volumetric feeding methods are used. This article first discusses volumetric feeding basics, then describes six common volumetric feeding methods and how to select a volumetric feeder. Other information discusses minimizing speed control and feedrate errors in volumetric feeding.

A feeder is a mechanical device that controls material flow from one point to another at some required rate. The device controls flow by weight [called a gravimetric feeder or weigh feeder] or by volume [called a volumetric feeder]. A gravimetric feeder feeds by directly measuring the material's weight [facilitated by sensing variations in the material's density] and then controlling the feedrate around the desired rate, or set-point, in units of weight per unit time. A volumetric feeder feeds a certain volume of material per unit time at a given motor speed, and its feedrate can be stated in units of volume per unit time [such as cubic feet per hour]. The feeder's material feedrate by weight [such as pounds per hour] must be inferred from motor speed assuming constant bulk density.

To read this entire article:

You may purchase this article now for personal use. Simply click the Buy Item button above, enter your payment details, and download the article. It will be available to you for 7 days for viewing, printing, or saving for future reference. All articles are copyrighted by CSC Publishing, Inc. and cannot be used for commercial purposes without express permission in writing from the Publisher. This includes but is not limited to: web posting, printing, or sharing via email.

Security:

Your payment information is forwarded in an encrypted form, using 40- or 128-bit Secure Socket Layer technology, only to our payment gateway (Authorize.net) for processing.

Acrobat:

To view an article, you must have Acrobat Reader installed on your computer. Click on the icon to download Acrobat Reader free of charge.

HyperLink
      Copyright 2014, CSC Publishing Inc. ALL Rights Reserved * Privacy policy