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11 2020
Keep Pressure Transducer Mounting holes clean
It is important to keep the Melt Pressure Transducer mounting holes clean and free of plastic buildup. Before cleaning an extruder, all transducers must be removed from the barrel to avoid damage. When removed, the plastic is likely to flow into the mounting holes and harden. If this plastic debris is not removed, extensive sensor tip damage will occur when the transducers are reattached.
A cleaning tool kit can be used to remove plastic contamination. Note, however, that repeated cleaning can make “very deep” holes and cause damage to the Melt Pressure Sensor transducer tip. In this case, spacers must be used to upgrade the converter.
A Few Simple Rules for a Pressure Transducer
Threads must be machined to correct tolerances.
Metal-metal gasket is required at 45 ° seating surface.
The recommended recess for the mounting holes is flush with 0.010 in.
Apply a high temperature anti-seize compound to the threads before assembly.
A minimum of 100 to 200 in. Lb torque is recommended to ensure a tight seal.
Do not torque more than 500 in-lb.