Rubber hydraulic hose and ... - Flipbook - Seite 336
Glossary & index | Danfoss
Glossary
A
abrasion: external damage to a
hose assembly caused by its being
rubbed on a foreign object; a
wearing away by friction.
ABS: Air-Brake Swivel absorption:
regarding hose, the process of
taking in fluid. Hose materials are
often compared with regard to
relative rates and total amounts
of absorption as they pertain to
specific fluids.
acid resistant: having the
ability to withstand the action of
identified acids within specified
limits of concentration and
temperature
adapter, adaptor: 1) fittings of
various sizes and materials used
to change an end fitting from one
type to another type or one size
to another. (i.e., a male SAE to male
pipe adapter is often attached
to a female SAE to create a male
end union fitting); 2) the grooved
portion of a cam & groove coupling.
adhesion: the strength of bond
between cured rubber surfaces or
between a cured rubber surface
and a non-rubber surface.
adhesive: a material which, when
applied, will cause two surfaces to
adhere.
ambient temperature: the
temperature of the atmosphere
or medium surrounding an object
under consideration.
ambient/atmospheric
conditions: The surrounding
conditions, such as temperature,
pressure, and corrosion, to which a
hose assembly is exposed.
amplitude of vibrations and/or
lateral movement: the distance a
hose assembly deflects laterally to
one side from its normal position,
when this deflection occurs on both
sides of the normal hose centerline.
anchor: a restraint applied to
eliminate motion and restrain forces.
annular: refers to the convolutions
on a hose that are a series of
complete circles or rings located at
right angles to the longitudinal axis
of the hose (sometimes referred to
as “bellows”).
anodize, anodized: an electrolytic
336
process used to deposit protective
or cosmetic coatings in a variety of
colors on metal; primarily used with
aluminum.
ANSI: American National Standards
Institute.
application working pressure:
unique to customer’s application.
See pressure, working.
application: the service conditions
that determine how a hose
assembly will be used.
armor: a protective cover slid over
and affixed to a hose assembly;
used to prevent over bending or
for the purpose of protecting hose
from severe external environmental
conditions such as hot materials,
abrasion, or traffic.
assembly: a general term referring
to any hose coupled with end
fittings of any style attached to one
or both ends.
ASTM: American Society for Testing
and Materials.
attachment: the method of
securing an end fitting to a hose
(e.g., banding, crimping, swaging, or
screw-together 2 piece or 3 piecestyle field attachable fittings).
axial movement: compression or
elongation along the longitudinal
axis.
B
backing: a soft rubber layer
between a hose tube and/or cover
and carcass to provide adhesion.
barb: the portion of a fitting
(coupling) that is inserted into the
hose, usually comprised of two or
more radial serrations or ridges
designed to form a redundant seal
between the hose and fitting.
barbed and ferrule fitting: a
two-piece hose fitting comprised
of a barbed insert (nipple), normally
with peripheral ridges or backwardslanted barbs, for inserting into a
hose and a ferrule; usually crimped
or swaged.
Barb-Tite: a line of low pressure
push-on brass hose end fittings
that is a trademark of Danfoss
Corporation.
bend radius: the radius of a bent
section of hose measured to the
innermost surface of the curved
portion.
smallest radius at which a hose can
be used. For metal hose: the radius
of a bend measured to the hose
centerline, as recommended by the
manufacturer.
blister: a raised area on the surface
or a separation between layers
usually creating a void or air-filled
space in a vulcanized article.
blow out force: the force
generated from the internal
pressure attempting to push the
fitting from the hose.
body wire: normally a round or flat
wire helix embedded in the hose
wall to increase strength or to resist
collapse.
bore: 1) an internal cylindrical
passageway, as of a tube, hose or
pipe; 2) the internal diameter of a
tube, hose, or pipe.
braid: the woven portion of a hose
used as reinforcement to increase
pressure rating and add hoop
strength. Various materials such as
polyester, cotton or metal wire are
used. A hose may have one or more
braids, outside or between layers of
hose material.
braid wear: motion between
the braid and corrugated hose,
which normally causes wear on the
outside diameter of the corrugation
and the inside diameter of the braid.
braided ply: a layer of braided
reinforcement.
braid-over-braid: multiple plies of
braid having no separating layers.
brand: a mark or symbol
identifying or describing a product
and/or manufacturer, that is
embossed, inlaid or printed.
brass: a family of copper/zinc
alloys.
brazing: a process of joining
metals using a non-ferrous filler
metal having a melting point that
is lower than the “parent metals”
to be joined, typically over +427ºC
(+800ºF).
bronze: an alloy of copper, tin and
zinc.
BSPP/BSPT: British Standard Pipe
Parallel / British Standard Pipe
Tapered. See fitting/coupling —
pipe thread fittings.
bend radius, minimum: the
EMEA Danfoss rubber hydraulic hose, fitting, tooling and accessories category catalog
C
carcass: the fabric, cord and/or
metal reinforcing section of a hose
as distinguished from the hose tube
or cover.
chalking: the formation of a
powdery surface condition due to
disintegration of surface binder or
elastomer by weathering or other
destructive environments.
checking: the short, shallow cracks
on the surface of a rubber product
resulting from damaging action of
environmental conditions.
chemical compatibility: the
relative degree to which a material
may contact another without
corrosion, degradation or adverse
change of properties.
chemical resistance: the ability
of a particular polymer, rubber
compound, or metal to exhibit
minimal physical and/or chemical
property changes when in contact
with one or more chemicals for a
specified length of time, at specified
concentrations, pressure, and
temperature.
cold flexibility: relative ease of
bending while being exposed to
specified low temperature.
collar: 1) the portion of a fitting
that is compressed by crimping
to seal the hose onto the fitting
barbs and create a permanent
attachment; also called a ferrule.
(With field attachable fittings, the
lock and seal are accomplished
mechanically by the collar without
crimping); 2) a raised portion on
the hose shank which functions as
a connection for a ferrule or other
locking device or functions as a
hose stop.
collet: a tool or die-set used to
crimp a hose end fitting onto a
hose. A crimping die-set is typically
six to eight “fingers” designed for
infinite diameter settings within
a range or preset to a specific
diameter for a given hose type and
size. Some may have a replaceable
cage.
Coll-O-Crimp: a line of hydraulic
and pneumatic hose, hose end
fittings, and fabrication equipment
that is a registered trademark of
Danfoss Corporation.
combustible liquid: a liquid
having a flash point at or above
+37.8°C (+100°F).
