Magnum Venus Plastech DP-1000 (EPO3) - Manual (Page 6)

INTRODUCTION
The EP03 Dual Pump Meter/ Mix Unit
The EPO3 unit is a medium
–to high-volume metering and mixing system capable of metering two
components at rations from 1:1 through 8:1, depending upon pump selection and pump settings.
The unit is capable of supplying a smooth, continuous flow of fully-mixed, reactive thermosetting
materials. A static mixing element used at the gun produces full mixing of most medium viscosity
epoxies, polyesters, and other thermosetting resins. Viscosity is reduced by using in-line heating
units which can increase fluid temperatures by as much as 50
 per recirculation cycle.
Metering ratios are adjusted by re-positioning the upper-pivot point of the hardener pump. This
makes possible extremely fine adjustment of ratio settings.
Continuous flow from the gun is supplied with the use of two pressure-charged air accumulators
located at each pump outlet. These accumulators operate in a fashion similar to hydraulic power
accumulators that dampen momentary pressure hesitations which can occur during pump
reversal.
Proper operation of the EP03 is achieved by a balancing of fluid pressures during the initial gun
use. Factors affecting this pressure balancing function are: viscosity of the material, size of the
injector orifice in the gun ( the size of the orifice regulates back pressures) , temperature settings
(which affects viscosity), and accumulator charge. Once control of these variables is achieved,
you will have fully mixed material at the initial triggering of the gun.
Whenever you stop operation of the EP03 for more than 10 minutes, you must place the machine
in the recirculation mode. This ensures that fully heated material is always present in the pumps
and in the hoses leading to the gun. The recirculation mode prevents and initial shot of cold
material which may occur as the material cools in the unit.
Maintaining proper pressure balance during the change from recirculation to operation mode is
very important in achieving proper mixing immediately upon triggering of the gun. We advise you
to concentrate on this aspect of operation during your initial training on the EPO3 unit.
The EPO3 unit can operate in several different configurations depending on accessories and
options. This unit can be used to spray certain materials, pour and cast, or perform RTM (Resin
Transfer Molding).
You can also attach a fiberglass chopper to the gun-head for addition of reinforcing fibers to the
material. Other options, such as digital timers, can be added as well. The EPO 3 can be used in
conjunctions with MVP’s high-production automated machinery such as Reciprocators,
Impregnators, and Winders. See your MVP catalog for complete descriptions of these systems.
Before you install the EPO3, you must consider the design of your material storage and handling
system. If you are working from five-gallon containers, you can easily use the pickup wands and
return hoses supplied with the system.
If you are working from 55-gallon barrels, you may consider installing these barrels in a horizontal
position with fittings attached to pickup material from the large bung hole and return material to the
small bung hole (with proper venting of the container.