Page 217 - Parker - Polyflex Hose Products (Ultra High Pressure Thermoplastic Hose)

polyflex ®
Catalog 4900
Technical Information Twin/Multi-Line Separation Instructions

Twin Line and Multi-Line Separation Instructions

1. Position twinned or multi-line hose 2. Measure and mark the length that the 3. Lightly lubricate the web area
assembly so that it lies flat on work hoses are to be separated. Note: if between the hoses. Distribute the
surface without tendency to twist or length of separation is specified from the lubricant uniformly along the web of
turn. threaded or swivel nut end of coupling, the assembly to be separated. Parker
deduct the cutoff allowance dimension Hoze-Oil or any lightweight oil will
for the specific style of coupling used. suffice. (SAE 10 or 20) The function of
The cutoff allowance is obtainable from the oil is to reduce the friction of the
the hose fitting tables found in the hose knife blade so that it naturally seeks the
fitting tables or can be calculated by center of the valley formed by the hoses.
subtracting the insertion depth of the This eliminates the need for the operator
shell from the overall coupling length. to steer the knife.

NOTE:
• It is important that the knife blade be
perpendicular to the hose during this pro-
cedure so that the blade cuts only the
center line of the web. EXTREME CARE
MUST BE TAKEN TO AVOID CUTTING
THROUGH THE COVER OF THE
4. Press the multi-line hose HOSES AND THEREBY EXPOSING
assembly firmly and flat against THE FIBER REINFORCEMENT. If this
the work surface with your free occurs, the hose assembly must be dis-
hand so that it does not move. carded. (see photo A.)
Using a Stanley trimming knife If the separation length is greater than 5. It is suggested that the separation
model No. l0-5l5 or equivalent, that which can be accomplished with one length be sufficiently long so that the
draw the knife toward you with continuous, smooth stroke, then the pro- swaging or crimping operation can be
constant light to moderate cedure should be repeated over shorter accomplished without risk of kinking the
pressure, and a smooth stroke. distances always cutting toward the free hoses or tearing the web which could
Three or four strokes will be end of the hoses. result in exposure of the braided
necessary to separate the hoses. reinforcement. (see photo B)
DON'T

A DON'T B

6. At the option of the assembler as EXTREME CARE MUST BE TAKEN The separation length must allow for the
dictated by the installation, it is TO AVOID CUTTING THROUGH THE swaging or crimping operation without
suggested that a nylon lashing strap COVER OF THE HOSES AND THEREBY damaging the hose.
or tape be applied at the termination EXPOSING THE REINFORCEMENT.
of the separated length to provide If this occurs, the hose assembly must
protection against tearing of the web be discarded.
or hose covers.

F8 Parker Hannifin Corporation
Parflex Division polyflex Operations
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