Repair manual

12
Apeks Regulator Service and Repair Manual
Figure 8
Adjustment Screw Pre-setting
REASSEMBLY PROCEDURES
Before performing any reassembly, it is important to inspect
all parts, both new and those that are being reused, to ensure
that every part and component is perfectly clean and free of
any dust, corrosion, or blemishes. Before dressing each O-
ring with Christo-Lube
®
, check to ensure it is clean, supple,
and free of any blemish.
Use only genuine Apeks parts, subassemblies, and components when-
ever assembling any Apeks product. DO NOT attempt to substitute an
Apeks part with another manufacturer’s, regardless of any similarity in
shape, size, or appearance. Doing so may render the product unsafe,
and could result in serious injury or death.
1. Insert the stem of the valve lifter(10) into the center bore hole inside
the low pressure side of the valve body(11).
2. Lay the diaphragm(9) over the valve lifter inside the valve body, and
gently tamp it down below the threads until it is seated evenly on all
sides.
3. Place the spring carrier(8) in the center of the diaphragm. Mate the
larger diameter threads of the diaphragm clamp(6) onto the valve
body, and tighten the diaphragm clamp clockwise by hand until snug.
4. Place the spring(7) inside the center of the diaphragm clamp so that
it rests directly over the spring carrier.
5. Mate the spring adjuster(5) into the center of the diaphragm clamp,
directly over the spring. Apply a 6mm hex key to turn the spring
adjuster clockwise to its correct preliminary setting until it is set ex-
actly 1/4” (6mm) below the rim of the diaphragm clamp (see Fig. 8).
6. Turn the first stage over and carefully lower the sealing end of the HP
valve(12) straight down over the pin of the valve lifter, inside the
high pressure side of the valve body.
7. Install the small dynamic O-ring(14) into the recess inside the small
end of the HP balance plug, and tamp it down with a non-metallic
instrument to ensure it is seated evenly on all sides. Next, fit the
smaller static O-ring(16) onto the groove near the small end of the
balance plug, and the larger O-ring(15) onto the groove at the large
end.
8. Fit the spring(13) over the small end of the HP balance plug. Then,
carefully mate the balance plug with spring straight down into the
valve body, over the stem of the HP valve. Press down with the palm
of one hand to compress the spring over the HP valve. While main-
taining downward pressure, turn the balance plug clockwise to en-
gage the threads of the valve body, and then continue turning by hand
until it is lightly snug.
NOTE
44
44
4"