Appendices
Appendix
VII
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings
1.1
Scope:
This safety guide provides instructions for selecting
and using (including installing connecting, disconnecting, and
main­tain­ing) quick action couplings and related accessories
(
in­clud­ing caps, plugs, blow guns, and two way valves). This
safety guide is a supplement to and is to be used with, the
specific Parker pub­li­ca­tions for the specific quick action
couplings and related ac­ces­so­ries that are being considered
for use.
1.2
Fail-Safe:
Quick action couplings or the hose they are
attached to can fail without warning for many reasons. Design
all systems and equipment in a fail-safe mode, so that failure
of the quick action coupling or hose will not endanger persons
or property.
1.3
Distribution:
Provide a copy of this safety guide to each
person that is responsible for selecting or using quick action
coupling products. Do not select or use quick action couplings
without thor­ough­ly reading and understanding this safety guide
as well as the specific Parker publications for the products
considered or selected.
1.4
User Responsibility:
Due to the wide variety of operating
conditions and uses for quick action couplings, Parker and its
dis­trib­u­tors do not represent or warrant that any par­ticu­lar quick
action coupling is suitable for any specific end use system. This
safety guide does not analyze all technical parameters that
must be considered in selecting a product. The user, through
its own analysis and testing, is solely responsible for:
•
Making the final selection of the quick action couplings.
•
Assuring that the user’s requirements are met and that the
use presents no health or safety hazards.
•
Providing all appropriate health and safety warnings on the
equipment on which the quick action couplings are used.
1.5
Additional Questions:
Call the appropriate Parker customer
service department if you have any ques­tions or require any
additional information. For the telephone numbers of the
ap­pro­pri­ate customer service department, see the Parker
pub­li­ca­tion for the product being considered or used.
2.0
QUICK ACTION COUPLING SELECTION IN­STRUC­TIONS
2.1
Pressure:
Quick action couplings selection must be made
so that the published rated pressure of the coupling is equal to
or greater than the maximum system pressure. Surge pressures
in the system higher than the rated pressure of the coupling will
shorten the quick action coupling’s life. Do not confuse burst
pressure or other pressure values with rated pressure and do
not use burst pressure or other pressure values for this purpose.
2.2
Fluid Compatibility:
Quick action couplings selection must
assure compatibility of the body and seal materials with the
fluid media used. See the fluid compatibility chart in the Parker
publication for the product being considered or used.
2.3
Temperature:
Be certain that fluid and ambient
temper­atures, both steady and transient, do not exceed the
limitations of the quick action couplings. Use caution and hand
protection when con­nect­ing or dis­con­nect­ing quick action
couplings that are heated or cooled by the media they are
con­duct­ing or by their environment.
2.4
Size:
Transmission of power by means of pressurized
liquid varies with pressure and rate of flow. The size of the quick
action couplings and other components of the system must be
adequate to keep pressure losses to a minimum and avoid
damage due to heat generation or excessive fluid velocity.
2.5
Pressurized Connect or Disconnect:
If connecting or
dis­con­nect­ing under pressure is a re­quire­ment, use only quick
action couplings designed for that purpose. The rated operating
pressure of a quick action coupling may not be the pressure at
which it may be safely connected or disconnected.
2.6
Environment:
Care must be taken to ensure that quick
action couplings are either compatible with or protected from
the environment (that is, surrounding conditions) to which
they are exposed. Environmental conditions including but not
limited to ultraviolet radiation, ozone, moisture, water, salt
water, chemicals, and air pollutants can cause degradation and
premature failure.
2.7
Locking Means:
Ball locking quick action couplings can
un­in­ten­tion­al­ly disconnect if they are dragged over obstructions
on the end of a hose or if the sleeve is bumped or moved
enough to cause disconnect. Sleeves designed with flanges to
provide better gripping for oily or gloved hands are especially
susceptible to accidental disconnect and should not be used
where these conditions exist. Sleeve lock or union (threaded)
sleeve designs should be considered where there is a potential
for accidental uncoupling.
2.8
Mechanical Loads:
External forces can significantly reduce
quick action couplings’ life or cause failure. Mechanical loads
which must be considered include excessive tensile or side
loads, and vibration. Unusual applications may require special
testing prior to quick action couplings selection.
2.9
Specifications and Standards:
When selecting quick action
couplings, government, industry, and Parker specifications
must be reviewed and followed as applicable.
Safety Guide
SAFETY GUIDE FOR SELECTING AND USING QUICK
ACTION COUPLINGS AND RELATED ACCESSORIES
DANGER:
Failure or improper selection or improper use of quick action couplings or related ac­ces­so­ries can
cause death, personal injury and property damage. Pos­si­ble consequences of failure or improper selection or
improper use of quick action cou­plings or related accessories include but are not limited to:
•
Couplings or parts thrown off at high speed.
•
Dangerously whipping hose.
•
High velocity fluid discharge.
•
Contact with conveyed fluids that may be hot,
•
Explosion or burning of the conveyed fluid.
cold, toxic, or otherwise in­ju­ri­ous.
•
Contact with suddenly moving or falling objects
•
Sparking or explosion while paint or flam­ma­ble
that are to be held in position or moved by the
liquid spray­ing.
conveyed fluid.
Before selecting or using any Parker quick action couplings or related accessories, it is important that you read
and follow the following instructions.