Page 199 - ParkerQuickCouplingCatalog38002010

Appendices
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN 55427 II-1
Appendices
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, cold,
• Explosion or burning of the conveyed fluid. toxic, or otherwise injurious.
• Contact with suddenly moving or falling objects that are • Sparking or explosion while paint or flammable
to be held in position or moved by the conveyed fluid. liquid spraying.
Before selecting or using any Parker quick action couplings or related accessories, it is important that you read and follow the
following instructions.
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 con-
ducting 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.
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.