Apeks FSR Series - First Stage Adjustment

FSR/FST First Stage Technical Maintenance Manual
9
17. Insert the small end of the conical lter (35) into the threaded
end of the handwheel connector (33). Insert an unlubricated
o-ring (13) into the handwheel connector around the lter.
ATX 200/100/50
ATX 40/20
2. Install o-rings (13 & 28) onto
the blanking plugs (27 & 31).
Using a 5mm hex key, install
the blanking plugs into the ap-
propriate ports in the body (12).
1. Attach the rst stage (with
no blanking plugs installed)
to a fully charged (3000
psi/206 bar) cylinder. Slowly
open the cylinder valve and
blow through the rst stage
to remove any particles or
contaminants.
WARNING: Compressed air can be highly explosive
and is dangerous if misused. Ensure cylinder valve
is opened slowly. Use eye and ear Personal Protec-
tive Equipment when performing any tests involving
compressed air.
18. Hold the rst stage with
the inlet opening fac-
ing downward. Pass the
handwheel connector (33)
through the threaded end
of the handwheel (34) and
into the body (12). Tighten
by hand.
CAUTION: You must hold the DIN connector assem-
bly vertically while being installed. Failure to do this
can cause the o-ring to not seat properly which in
turn will create a HP leak.
19. Using a vise mounting tool,
install the rst stage into
a bench vise. With a ft/lb
torque wrench and a 6mm
hex key adapter, torque the
handwheel connector (33)
to 14.7 ft/lbs (20 Nm). Re-
move the rst stage from
the bench vise, remove the
vise mouting tool.
ADJUSTING THE FIRST STAGE
NOTE: First stage models in the ATX and TX range have a
1/2” main MP port for the second stage. First stage models in the
XTX range have a 3/8” main MP port for the second stage.
WARNING: If the pressure gauge rapidly exceeds 145 psi/10
bar, there is a HP leak. Quickly close the cylinder valve and
purge the second stage, or reopen the relief valve of the test
gauge and close the cylinder. Failure to do so may cause a
rupture to the MP hose and/or MP gauge, which in turn can lead
to personal injury. Refer to Table 1: Troubleshooting Guide, p.
11 for the causes of high or unstable MP.
CAUTION: Before pressurizing the rst stage, it is important
to have a properly adjusted second stage attached to the rst
stage. This will provide a safety relief valve if the MP exceeds
145 psi/10 bar. Failure to relieve increasing MP may result in
damage to the test gauge or the MP hose.
3. Install MP gauge (pn 111610) to a MP hose and thread the
hose into the open MP port. Open the relief valve. If your test
gauge does not have an overpressure relief valve, then it is
vital that a properly adjusted second stage is attached to the
rst stage to act as an overpressure valve in the event of a
HP leak. Attach the rst stage to a calibrated test bench or a
cylinder lled to 3000 psi/206 bar.
4. With the relief valve open on the gauge, slowly open cylinder
valve and pressurize the rst stage. If the MP rapidly exceeds
145 psi (10 bar), close the cylinder immediately and purge the
line; this means there is an HP leak..
5. If no leaks are detected, ad
-
just using a 6mm hex key.
To increase the MP, turn the
adjustment screw in 1/8 turn
increments clockwise. Using
the relief valve on the gauge,
cycle the first stage several
times after each adjustment.
To decrease the MP, turn in the
adjustment screw in 1/8 turn
increments counter-clockwise. Using the relief valve on the gauge,
cycle the rst stage several times after each adjustment. Set the MP
to 130-145 psi (9-10 bar).
6. Let the rst stage stand for several minutes. Check that the
MP remains stable. If the MP rises more than 5 psi (0.3 bar), it
indicates a leak. If the MP is stable, close the valve, purge the
line, and pressurize once again to perform the nal check.
WARNING: Be certain not to install a MP hose into the HP port
via an adapter. Doing so may cause the hose to rupture when
pressurized, and could result in serious personal injury.