Owner's manual

Crystal Safety Guide for Using Hose Assemblies and Fittings  4
Fluid Compatibility
Hose Assembly selection must assure compatibility of the Hose Assemblies tube, cover, reinforcement, and Fittings with the uid media used. Actual service
life can only be determined by the end user by testing under all extreme conditions and other analysis.
Permeation
Permeation (that is, seepage through the Hose) will occur from inside the Hose to outside when the Hose is used with gases, liquid and gas fuels, and refriger-
ants (including but not limited to such materials as helium, diesel fuel, gasoline, natural gas, or LPG). This permeation may result in high concentrations of va-
pors which are potentially ammable, explosive, or toxic, and in loss of uid. Dangerous explosions, res, and other hazards can result when using the wrong
Hose f
or such applications. The user must take into account the fact that this permeation will take place and must not use Crystal Engineering Hose Assem-
blies if this permeation could be hazardous. The user must take into account all legal, government, insurance, or any other special regulations which govern
the use of fuels and r
efrigerants. Never use a Hose even though the uid compatibility is acceptable without considering the potential hazardous eects that
can result from permeation through the Hose Assembly. Permeation of moisture from outside the Hose to inside the Hose will also occur in Hose Assemblies,
regardless of internal pressure. If this moisture permeation would have detrimental eects (particularly, but not limited to refrigeration and air conditioning
systems), incorporation of sucient drying capacity in the system or other appropriate system safeguards should be selected and used.
Size
Transmission of power by means of pressurized uid varies with pressure and rate of ow. The size of the components must be adequate to keep pressure
losses to a minimum and avoid damage due to heat generation or excessive uid velocity.
Routing
Attention must be given to optimum routing to minimize inherent problems (kinking or ow restriction due to Hose Assembly collapse, twisting of the Hose
Assembly, proximity to hot objects or heat sources).
Environment
Care must be taken to insure that the Hose Assemblies and Fittings are either compatible with or protected from the environment (that is, surrounding condi-
tions) to which they are exposed. Environmental conditions including but not limited to ultraviolet radiation, sunlight, heat, ozone, moisture, water, salt water,
chemicals
, and air pollutants can cause degradation and premature failure.
Mechanical Loads
External forces can signicantly reduce Hose Assembly life or cause failure. Mechanical loads which must be considered include excessive exing, twist, kink-
ing, tensile or side loads, bend radius, and vibration. Use of swivel type Fittings or adapters may be required to insure no twist is put into the Hose Assembly.
Unusual applica
tions may require special testing prior to Hose Assembly selection.