Parker Hannifin Corporation
Fluid System Connectors
Otsego, Michigan
N6
Catalog 3501E
General Technical
Routing of Lines
Routing of lines is probably the most difficult yet most significant of
these system design considerations. Proper routing involves getting a
connecting line from one point to another through the most logical path.
Always try to leave fitting joints as accessible as possible. Hard to reach
joints are hard to assemble and tighten properly. Inaccessible joints are
also more difficult and time consuming to service.
The most logical path should have the following characteristics:
•
Avoid excessive strain on joint —
A strained joint will eventually
leak. (See Figures A14 through A21.)
•
Allow for expansion and contraction —
Use a “U” bend or a hose in
long lines to allow for expansion and contraction. (See Figure A22.)
•
Allow for motion under load —
Even some apparently rigid
systems do move under load. (See Figure A23.)
•
Get around obstructions without using excessive amount of 90°
bends —
Pressure drop due to one 90° bend is greater than that due
to two 45° bends. (See Figures A24 and A25.)
•
Keep tube lines away from components that require regular
maintenance.
(
See Figures A26 and A27.)
•
Have a neat appearance and allow for easy troubleshooting,
maintenance and repair.
(
See Figures A28 and A29.)
Fig. A14 — Correct Routing
Fig. A15 — Incorrect Routing
Fig. A16 — Correct Routing
Fig. A17 — Incorrect Routing
Fig. A18 — Correct Routing
Fig. A19 — Incorrect Routing
Fig. A20 — Correct Routing
Fig. A21 — Incorrect Routing
Fig. A22 — U-Bend Allowing Expansion and Contraction
Fig. A23 — Bent Tube Allowing for Motion Under Load
Fig. A25 — Incorrect
Fig. 24 — Correct
Fig. A27 — Incorrect
Fig. A26 — Correct
Fig. A29 — Incorrect
Fig. A28 — Correct