Page 422 - 4300 Catalog Cover.pdf

4300 Catalog Assembly / Installation
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
T12
Tube End Assembly
The assembly of the tube end consists of the following two
steps:
1. Tube end preparation (cutting, deburring and cleaning)
2. Assembly and installation
Tube End Preparation
Tube end preparation is a very critical step to assure the integrity
of a tube assembly. Failure to properly perform this function can
result in leakage.The three steps in proper tube end preparation
are: cutting, deburring and cleaning.
Cutting
Cut tube reasonably square (within+/- 1°) usingacircular toothed
cut-off saw (see Fig. T10), or a hacksaw with a fine tooth blade
guided by a Tru-Cut Saw Guide (shown in Fig. T11)or other
mitre-type saw guide.
Fig. T10 – Cut-off Saw on Parker’s TP432 or TP1025
Tube Preparation Center
Fig. T11– Parker’s Tru-Kut Sawing Vise used with
hacksaw
A tube cutter may be used with soft tube such as copper and
aluminum. It is not recommended for steel and stainless steel
tube because it creates a large burr on the I.D., which is difficult to
remove and creates flow restriction. For a steel or stainless steel
tubeapplication, Fig.T12 illustrates aproper cut andan improper
cut (the improper cut was performed by a tube cutter).
Improper Cut
Proper Cut
Fig. T12 – Samples of improper and proper cuts on
steel tube
Asquarecut isessential toassurea leak-freeconnection.The fol-
lowing illustrations depict what will result from an uneven cut.
Inadequate
contact area
Possible nut
interference Uneven bite may result from
out-of-square tube cut
Inadequate
contact area
Possible nut
interference Too large of a gap
impedes braze flow
Fig. T13– Results of Uneven Tube Cuts
Flare Connection
Flareless Bite
Type Connection
Mechanical
Formed ORFS
Connection
Brazed ORFS
Connection
Tube End Assembly