PPI-109-REV. B IMPCO Technologies Inc. April, 2008
F. Test Plug for Positive Pressure Regulator:
The Test Plug (also referred to as the special bleed plug) is used on positive pressure regulators to
allow a small amount of air to flow through during testing. The steps on the following page show the
Test Plug used during testing of a PJ regulator.
1. Attach an air hose fitting to inlet at the top and thread
the special bleed plug (shown held on the right) and
the two brass fittings (left). Both the special bleed plug
and brass fittings are included in IMPCO Test Kits ITK-
1 and ITK-4.
2. Attach a 100 psi air pressure hose to the regulator
"INLET" fitting. Connect a water column gauge to the
brass fitting(s) to measure the output pressure. Check
the spring housing, body plate and covers for leaks
using a liquid leak detector solution. Refer to pressure
rating provided by IMPCO for the pressure range
specification.
3. Remove air hose fitting, brass fittings and replace the
special bleed plug with the plug. Torque 2 to 3 turns
past finger tight. The rebuild is now complete.
3030 South Susan St. Page 11 of 12
Santa Ana, CA 92704
www.impcotechnologies.com