MPI Morheat MG1 Installation Manual

MPI Morheat Inc MPI
Installation Manual
MG series - Digital Melt Pressure Gauge
Models: MG1, MG2, MGJ

DIGITAL MELT PRESSURE GAUGE - Installation Guidelines

1. HOLE LOCATION

The best position to mount the gauge is in front of the screw where the polymer is in a good molten state and shear stress is minimized.
For reclaimed extrusion lines, care must be taken that the gauge is situated far enough from hopper to ensure all pellets are melted. Partially
melted pellets can damage the tip.
Gauge Housing should be installed such that it doesn't get beyond 150F.
Care must be taken if gauge is mounted on the top of extruder. Heat rises and will heat the housing. If you can touch the housing, it is probably
fi ne. If necessary, fl ex armour style may be recommended to get housing away from heat.

2. DRILLING MOUNTING HOLE

Follow outlines in the DRILL KIT MANUAL. Some points to take care.
a. MOUNTED HOLES CONCENTRICITY:
The gauge tip must be mounted in the center of the hole (within 0.002").
If the tip is not in the center, the gauge tip can be deformed during installation or removal.
This can increase the error, or even cause the tip to fail prematurely.
b. RECESSING OF THE TIP
The gauge tip should be installed within 0.08" to 0.1" of the interior of the extuder barrel. Any further, and this can create
a cavity for polymers to collect, harden and then interfere with the pressure reading.
Some materials (such as nylons and polycarbonates) will actually shrink and pull the diaphragm towards to interior of the extruder. This some-
times causes the diaphragm to be ripped off . These materials should be recessed to approx 0.005".
MOUNTING HOLE DETAILS