Volumetric Feeder

Applications Where Volumetric Feeders Are the Best Choice

Volumetric feeders offer a low cost and easy to use option for batch or continuous applications when the bulk density of the material being fed is consistent or when precise feed accuracy is not critical to the quality of the end product.

For greater feed accuracy, volumetric screw feeders are frequently employed in gain-in-weight batching applications. When process requirements are more demanding, screw feeders with gravimetric scales and loss-in-weight controls provide a higher level of accuracy.

We make volumetric screw feeders that provide reliable and consistent performance. Single screw volumetric feeders are the best choice for easy flowing materials, while twin screw volumetric feeders are the best solution for more difficult to handle bulk materials. Volumetric feeders are available in a number of different models and hopper sizes to meet a wide range of feed rates.

Single Screw Volumetric Feeders

The single screw volumetric feeder is designed to provide volumetric feeding for a variety of materials including pellets, granules and free flowing powders.

Single screw feeders are available with a wide range of interchangeable feed screws depending on the material being fed. The feeder is mounted on a painted steel base plate. All material contact parts are stainless steel. The feeder is easily disassembled for cleaning or change-over. The special design of the feeding bowl is unique and patented and employs a horizontal agitator to improve material fill of the screw flights. The feeding bowl design allows material to flow evenly from all directions into the screw and effectively avoids material build-up, making feeding more accurate.

Optimum feed screws are determined based on material characteristics of the bulk solid to be fed. Following are estimated feed rates for free flowing materials. For feed rates at either end of the range, feeder testing is recommended.

Feeder Model	Feed rates	Materials Fed	Asymmetrical Hopper	Symmetrical Hopper
EV-Y60	4-1200 L/h	Pellet, free flowing powder, etc.	40L/80L/120L/150L	10L/80L/120L/180L

Twin Screw Volumetric Feeders The twin screw volumetric feeder is designed to provide accurate volumetric feeding for a wide variety of difficult materials including poor flowing powders, fibers and flakes.

All material contact parts are stainless steel. The feeder is easily disassembled for cleaning or change over. The special design of the feeding bowl is unique and patented and employs a horizontal agitator to improve material fill of the screw flights. The feeding bowl design allows material to flow evenly from all directions into the screw and effectively avoids material build-up, making feeding more accurate. An optional vertical agitator is available for poor flowing powders that tend toward bridging.

Optimum feeder screws are determined based on the material characteristics. The following estimated feed rates are for free flowing materials. For feed rates at either end of the range, feeder testing is recommended

Feeder Model	Feed rates	Materials Fed	Asymmetrical Hopper	Symmetrical Hopper
EV-E28	20-300L/h	Poor flowing powders, fibers and flakes.	40L/80L	10L/40L/80L/120L
EV-E38	120-1600L/h	Poor flowing powders, fibers and flakes.	80L/120L/150L	80L/120L/180L
EV-E46	1200-6000L/h	Poor flowing powders, fibers and flakes.	80L/120L/150L	120L/180L/300L

Volumetric Feeder Controller

The motor speed regulator uses a frequency inventor, which may be supplied by the end user.