User guide

TrueFeed manual

7.10 Filling the hopper

MANUAL FILLING

The control will automatically detect when the hopper is being manually filled.

During the time that the hopper is being filled, the TrueFeed is feeding with a fixed RPM; this means that the

unit is running temporarily volumetric. As soon as the hopper is filled, the TrueFeed immediately reverts to

working gravimetric.

AUTOMATIC FILLING (optional)

Introduction

Conair Truefeed feeders are capable of handling a variety of dry materials. Three (3) different filling systems

are available, depending on the material properties.

-The Conair Ejector (ME) system for dust-free or nearly dust-free materials.

-The Conair Vacuum (MV) system for materials that are NOT entirely dust free.

-The Conair (EX) loading system for use with an alternative hopper loader that includes a support frame and

surge hopper.

The ME, MV and EX systems are driven by low-pressure compressed air and mounted directly on top of the

hopper lid of the Conair feeder. The TrueFeed controls the operation of the ME, MV and EX systems.

All parts are aluminum or stainless steel and are virtually maintenance-free. Only the filter on the ME and MX

systems need to be cleaned periodically. To increase reliability and safety, there are no moving parts except

for the pneumatically-operated closing valve of the MV system and the knife gate of the EX system.

How the ME works

The ME system blows the material from a bag, drum or container into the

hopper of the feeder. The hopper lid of the housing has a simple and easy-to-

clean dust filter to keep any dust particles in the hopper. The system is

triggered by the filling start weight (CONFIGURATIONS menu). This

parameter also generates a low-level alarm if the hopper is empty. For

installation instructions, see Appendix E entitled, ME Hopper Loader

Installation.

How the MV works

The MV system uses a 3-stage vacuum generator driven by compressed

air to create a vacuum that conveys material into a chamber that closes.

Once the chamber is filled with material, the cone that closes the chamber

will open and the material will be discharged into the hopper. The system

is equipped with a filter to ensure that the finest particles (> 5 micron) stay

in the system and are not released into the atmosphere. This makes the

MV system the most practical and user-friendly system for both powders

and granules. For installation instructions, see Appendix F entitled, MV

Hopper Loader Installation.

ME hopper loader

MV hopper loader