Dynamax HPFM3, Installation And Operation Manual, Page: 29 / 86

Photo 2
Compressed Air & HPFM near Connection
Revision: JUNE 2017 29
5.3.2 Preparing the Compressed Air Supply System for use with the HPFM
Connect the hose quick-disconnect (Male) into the HPFM compressed air supply quick-disconnect (Female).
Make sure that the needle valve is opened about 4 turns. The airflow control valve (AV) should be closed or pointed
directly up. Remember that turning the valve to the right will bleed pressure from the HPFM. Turning the valve to the left
will increase pressure when the compressed air supply is connected. If you are setting up to measure a quasi-steady state
flow, turn the Needle Valve (NV) next to AV until the digital gage reads ~550 kPa (~80 PSI). Do not go over 550 kPa (~80
PSI). The HPFM has a safety relief valve which is set for ~650 kPa (~95 PSI).
If you wish to test the unit or run a quasi-steady state flow test, open the Compressed Air Valve until there is a
steady increases in the pressure in the CAT. Fill the CAT at a rate of about 7-10 kPa (1-1.5 PSI) per second.
The Needle Valve can be used to regulate the rate of increasing pressure. Close the Compressed Air Valve (AV
in Photo 4 page 34) when you have reached the required pressure in a range from 200 to 500 kPa (29 to 72 PSI).
WARNING!
Do not attempt to adjust or “plug” the safety relief valve!
If you are doing a transient pressure test, release CAT pressure at 0 to 7 kPa (0 to 1 PSI) and turn the pressure regulator
screw until the outlet pressure is at least 4.1 Mpa (600 PSI). Make sure that the needle valve is opened about 2-3 turns so
that the pressure increases about 7kPa(1 PSI) per second. Open Compressed Air Valve only in conjunction to starting the
software for the test. The “disconnect” on the air pressure hose and HPFM system has a working pressure of 690 kPa (100
PSI.) Pressure on the disconnect seals above 690 (100 PSI) could cause a catastrophic failure of the “disconnect system”
or personal injury. You also can generate a loud, annoying “pop” sound unless the pressure is released first.
Increase the air regulator pressure to 140 kPa (20 PSI) and check for leaks again. Decrease the pressure by backing off the
regulator screw. Depress the end of the “disconnect” into a hard flat surface such as a coin. This will open the disconnect
seal and release the small amount of gas in the hose.