3
Operation
1. Open the pump bypass valve by turning the
handle counterclockwise at least one-half to one
turn. It may be necessary to first close the valve
completely by turning the handle clockwise until
it stops.
2. Prepare tube ends by deburring or using the
Swagelok chamfer block as follows.
Note: The chamfer block procedure should be
followed when using up to and including
one inch tubing.
A. Cut tubing squarely. Use of a Swagelok tube
saw guide is recommended.
B. Remove any burrs. Use of Swagelok tube
deburring tools is recommended.
WARNING
Failure to deburr the OD of the tube
could prevent the tube from properly
resting against the piston shoulder. ID
burrs could break off and cause damage
in other components of the system.
C. For the up to and including one inch MHSU,
use the chamfer blocks provided. Insert cut
end of tubing into the chamfer block and
while firmly holding the tubing, strike the
chamfer block with a hammer to coin the
end (as shown on the instruction decal in the
MHSU case).
D. If a file is used on the OD, make a 10° x
0.06 in. (1.5 mm) chamfer.
3. Insert tubing into the Swagelok end fitting to be
pre-swaged. Disassemble the nut from the end
connection, leaving the nut and ferrules on the
tubing. The orientation of the nut, rear ferrule,
and front ferrule should be as shown in Fig. 3.
Fig. 3 Nut and Ferrule Orientation
4. Insert the tubing into the die head until it rests
firmly against the piston shoulder. Tighten the
nut until finger-tight and all die threads are
covered by the nut.
5. Push the indicator knob forward until it snaps
into place. The knob shoulder should be flush
with the hydraulic housing. See Fig. 4.
Fig. 4 Indicator Knob in Swaging Position
Note: If the indicator knob does not snap into
place or is not flush with the housing
the piston may not be fully retracted.
This problem may be caused by the
bypass valve being closed or by the
piston binding. Do not proceed until unit
is functioning properly. Contact your
authorized Swagelok sales and service
representative for further assistance.
6. Close the pump bypass valve to the finger-tight
position by rotating valve handle clockwise until
it stops.
7. While holding the tubing against the piston
shoulder, increase the hydraulic pressure by
using the hand pump until the indicator knob is
released.
WARNING
Do not use the hand pump after the indicator
knob releases. Failure to stop pumping after
the indicator knob releases may affect fitting
performance.
8. Mark the tubing at the back of the nut.
Note: This mark will be used later to ensure the
nut has been sufficiently hand tightened
when assembled to the fitting body.
9. Open the pump bypass valve by turning the
handle one-half to one turn counterclockwise.
10. Unthread the Swagelok nut and remove the
preswaged assembly from the housing.
Knob shoulder is
flush with housing.
