Appendix
VIII
Appendices
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings
2.10
Vacuum:
Not all quick action couplings are suitable or
rec­om­mend­ed for vacuum service. Quick action couplings used
for vacuum applications must be selected to ensure that the
quick actions couplings will withstand the vacuum and pressure
of the system.
2.11
Fire Resistant Fluids:
Some fire resistant fluids require
seals other than the standard nitrile used in many quick action
couplings.
2.12
Radiant Heat:
Quick action couplings can be heated to
destruction or loss of sealability without contact by such nearby
items as hot manifolds or molten metal. The same heat source
may then initiate a fire. This can occur despite the presence of
cool air around the quick action couplings.
2.13
Welding and Brazing:
Heating of plated parts, including
quick action couplings and port adapters, above 450°F (232°C)
such as during welding, brazing, or soldering may emit deadly
gases and may cause coupling seal damage.
3.0
QUICK ACTION COUPLING INSTALLATION INSTRUCTIONS
3.1
Pre-Installation Inspection:
Before installing a quick
action coupling, visually inspect it and check for correct style,
body material, seal material, and catalog number. Before
final in­stal­la­tion, coupling halves should be connected and
disconnected with a sample of the mating half with which
they will be used.
3.2
Quick Action Coupling Halves From Other Manufacturers
If a quick action coupling assembly is made up of one Parker
half and one half from another manufacturer, the lowest
pressure rating of the two halves should not be exceeded.
3.3
Fitting Installation:
Use a thread sealant, lubricant, or
a combination of both when assembling pipe thread joints in
quick action couplings. Be sure the sealant is compatible with
the system fluid or gas. To avoid system contamination, use a
liquid or paste type sealant rather than a tape style. Use the
flats provided to hold the quick action coupling when installing
fittings. Do not use pipe wrenches or a vice on other parts of
the coupling to hold it when installing or removing fittings as
damage or loosening of threaded joints in the coupling assembly
could result. Do not apply excessive torque to taper pipe threads
because cracking or splitting of the female component can
result.
3.4
Caps and Plugs:
Use dust caps and plugs when quick
action couplings are not coupled to exclude dirt and
contamination and to protect critical surfaces from damage.
3.5
Coupling Location:
Locate quick action couplings where
they can be reached for connect or disconnect without exposing
the operator to slipping, falling, getting sprayed, or coming in
contact with hot or moving parts.
3.6
Hose Whips
:
Use a hose whip (a short length of hose
between the tool and the coupling half) instead of rigidly
mounting a coupling half on hand tools or other devices. This
reduces the potential for coupling damage if the tool is dropped
and provides some isolation from me­chan­i­cal vibration which
could cause uncoupling.
4.0
QUICK ACTION COUPLING MAINTENANCE IN­STRUC­TIONS
4.1
Even with proper selection and installation, quick action
coupling life may be significantly reduced without a continuing
maintenance program. Frequency should be determined by the
severity of the application and risk potential. A maintenance
program must be established and followed by the user and
must include the following as a minimum:
4.2
Visual Inspection of Quick Action Couplings:
Any of the
following conditions require immediate shut down and
replacement of the quick action coupling:
•
Cracked, damaged, or corroded quick action coupling parts.
•
Leaks at the fitting, valve or mating seal.
•
Broken coupling mounting hardware, especially breakaway
clamps.
4.3
Visual Inspection All Other:
The following items must be
tightened, repaired or replaced as required:
•
Leaking seals or port connections.
•
Remove excess dirt buildup on the coupling locking means
or on the interface area of either coupling half.
•
Clamps, guards, and shields.
•
System fluid level, fluid type and any air entrapment.
4.4
Functional Test:
Operate the system at maximum operat-
ing pressure and check for possible malfunctions and freedom
from leaks. Personnel must avoid potential hazardous areas
while testing and using the system.
4.5
Replacement Intervals:
Specific replacement intervals
must be considered based on previous service life, government
or industry recommendations, or when failures could result in
unacceptable downtime, damage or injury risk. See instruction
1.2
above.
Additional copies of the preceding safety information can be
ordered by requesting “Safety Guide For Selecting and Using
Quick Action Couplings and Related Accessories,” Parker
Publication No. 3800-B1.0
Contact The Quick Coupling Division, Minneapolis, MN.
Safety Guide