Process
Model
HPD
Analytical
Instrument
Tank Change
Over System
3 Way
Valve
Model
HPD
Model
HPD
3
FAIRCHILD MODEL HPD
Pressure Regulator
Installation, Operation and Maintenance Instructions
Panel Mounting
To panel mount the HPD, the knob must first be removed. To remove the knob, first using a small
screwdriver, pry up the insert in the top to expose the range screw and jam nut. Remove the jam nut and
then unscrew the knob from the range screw. Insert the HPD pressure regulator through the 1 3/8" hole in
the panel and fix it in place with the retaining nut. Reinstall the knob on the range screw and fix it in place
with the jam nut. Reinstall the knob cover
Knob adjustment
The knob on the HPD pressure regulator can be adjusted to limit the range of the output pressure. First
assure the pressure regulator has the intended operating supply pressure applied to the unit. Remove the
cover from the top of the knob and loosen the jam nut on the range screw. Insert a 3/16" hex wrench in the
range screw and adjust the pressure regulator to the desired maximum range. (Note, do not set the
pressure regulator to more than 110% of the rated range.) Adjust the knob so that it stops against the
bonnet. Tighten the jam nut to lock the knob to the range screw. Reinstall the knob cover.
