SB-6-132-G Page 5
MAINTENANCE –
FLOW-THRU REGULATOR
Do not submerge regulator or com-
ponents in solvent or use solvent to
clean regulator parts. Damage may
occur to regulator and components.
Use a cloth dampened in warm, soapy
water to clean exterior of regulator.
Note
This unit may be serviced without
removing the unit from the com-
pressed air line.
1. Frequency of servicing depends largely
on the condition of the compressed air
system and the degree of contamination
in the system.
2. Before attempting to service this product
in-line, depressurize both the upstream
and downstream sides of regulator.
3. Remove the bottom plug, valve spring
and valve assembly. Inspect all seals
and components for damage and
replace as required. Clean seals and
components with mild detergent and
water. Use a clean, dry cloth to wipe
any contamination from valve seal inside
the body. Lubricate the valve stem and
lower valve O-ring seal with a light coat
of MAGNALUBE-G or similar lubricant.
Reassemble. Bottom plug torque should
not exceed 25 in./lbs. (2.8 N-m).
4. To replace main spring or diaphragm,
turn adjusting knob counterclockwise
to remove all spring force, then remove
bonnet. Remove the adjusting screw
assembly, main spring, slip ring and
diaphragm assembly. Inspect the dia-
phragm and the relief seat for damage
and contamination. Replace diaphragm
assembly if necessary. Clean the relief
seat with a soft dry cloth. Reassemble
in reverse order making sure the slip
ring is properly positioned on top of the
diaphragm. Bonnet torque should not
exceed 120 in./lbs. (13.6 N-m).
Figure 7 – HAR-508 Regulator
5. Before returning unit to service, ensure
that all seals have been properly rein-
stalled or replaced and components re-
quiring torque values have been properly
set.
6. If regulated pressure begins to creep (an
uncontrolled rise in regulated pressure),
it will most likely be caused by contami-
nation on the valve seat.
7. If the unit leaks from the vent holes in the
bonnet, it may be caused by contamina-
tion, deterioration or damage to the valve
seat or diaphragm relief seat. Replace
any damaged or worn components.
Knob
Panel
Nut
Bonnet
*Thrust
Washer
*Adjusting
Screw
Assembly
*Main
Spring
*Slip
Ring
*Diaphragm
Assembly
*Valve
Assembly
Body
Assembly
*Valve
Spring
Bottom
Plug
*Bottom
Plug
O-Ring
Body
Cover
* KK-5045 Diaphragm Repair Kit
