QRV 9100 (PDF FORMAT)
5
©
Copyright Eaton Corp. 2006, All Rights reserved.
3.0
MAINTENANCE
Before performing any work, read this manual
and study all figures. Assure yourself that you
understand and can do what is required in
each step. Failure to follow these instructions
may affect quick release valve operation and
may result in personal injury.
Two quick release valve replacement kits are
available for valve rebuilding. An end cap/dia-
phragm kit is available for valves not having
mufflers, and contains an end cap, diaphragm
and tube of Loctite
®
#222. An end cap/dia-
phragm/muffler kit contains all of the above
along with a muffler. It is advisable to stock at
least one spare quick release valve for each
size used in an installation.
The quick release valve should be periodically
checked for proper functioning. If the valve fails
to seal, it should be inspected internally. Usually
foreign material will be found which has been
carried through the piping. If a valve becomes
ineffective after prolonged service, it can be
restored to good operating condition by rebuild-
ing.
3.1
Valve and Diaphragm Service
Before performing any work on the valve, set
and block the machine or equipment in a
secure position; close the air shutoff valve
and exhaust all air from the air lines; and dis-
connect all electrical power in order to pre-
vent personal injury and/or equipment
damage.
3.1.1
If the quick release valve exhaust port is positioned
downward, it will be difficult to service the diaphragm.
It is recommended that the valve be removed from
the equipment and bench-serviced.
3.1.2
Use a flat faced wrench to unscrew the muffler (if
present) and the end cap. The diaphragm may fall
out of the housing at this time. Discard the end cap,
muffler and diaphragm.
Note : The end caps on quick release valves man-
ufactured prior to September, 1989, have hex-
shaped exhaust ports to accommodate an allen
wrench for end cap removal. Refer to Table 5 for
the appropriate wrench size to remove the end
cap. Discard after removal.
3.1.3
If the diaphragm did not fall out of the housing, gently
pry along its outside diameter, being careful not to
damage the sealing surface on the housing.
3.1.4
Inspect the diaphragm sealing surface in the housing
(shown on figure) If the surface is worn, scratched or
corroded, the entire quick release valve must be
replaced.
Figure 4
Do not attempt to renew the diaphragm seal-
ing surface by sanding or machining.
Machining the surface will increase the dia-
phragm operating gap and cause the valve to
malfunction.
3.1.5
Thoroughly clean the inside of the housing and the
internal threads in the housing.
Table 5:
End Cap Allen Wrench Size
QRV Size
Width Across Flats
3/8
1/2”
1/2
3/4”
3/4
1
N/A
