Adjusting the PCV
Operation
4-8
Part 1120277_01
E 2012 Nordson Corporation
Adjusting the PCV
Your melter will have one of the following types of pressure control: manual
PCV, automatic pressure control option, or flow control bypass option. Refer
to Pressure Control Options in Section 2, Description, for a detailed
description of the pressure control options. Refer to Melter Part Numbers in
Section 7, Parts, to determine the configuration of your melter.
NOTE: If you want to change the type of pressure control, service kits for
each option are available for fiel d-retrofit. Refer to Section 7, Parts.
Manual PCV (X Option)
NOTE: The PCV screw is turned fully counterclockwise (at or near the
valve's lowest pressure setting) at the factory and then the lock nut is
tightened.
CAUTION! Do not exceed 2.7 NSm (24 in.-lb) of torque when adjusting the
PCV.
To use the PCV to control adhesive output, loosen the lock nut and adjust the
valve to achieve the desired adhesive output rate for your manufacturing
process. With the melter at operating temperature, the line running, and the
guns dispensing adhesive, turn the adjustment screw on the PCV:
S clockwise to increase the adhesive output
S counterclockwise to decrease the adhesive output
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