Process Technology LUFRAN Instruction page 24

Plumbing (Continued):
Flared Compression Process Fluid Inlet and Outlet Connections:
The standard process fluid connections consist of inlet and outlet ports with two fittings
on the same horizontal centerline.
should only be performed once, when the tubing is first connected to the fittings. Once
properly tightened, the fittings will not need to be re-tightened in the future.
1) Remove the protective plastic caps from the flared fittings on the Inlet and Outlet
piping of the heater assembly.
2) Connect properly flared tubing to the flared fitting on the heater chamber
assembly.
3) Tighten the fitting nuts until fitting nut contacts the flared tubing. Tighten an
additional ¼ turn. Then tighten fitting nut to the maximum required torque value.
See the table below for proper values.
4) Repeat this procedure for each of the flared tube fittings on the filter chamber,
including the bleed and drain fittings.
5) Check for leaks at the fittings.
6) Circulate hot fluid through the filter chamber at the operating temperature of the
system, allowing the filter chamber to reach operating temperature.
7) Cool down the filter chamber to ambient.
minimum torque value. See Table 6 for proper value.
Fitting Size
13mm (½-inch) flared
19mm (¾-inch) flared
25mm (1-inch) flared
M-43-01
Revision - Date: 08 – 04/06/15
Please note that the procedure specified below
Re-tighten the fitting nut to the
Torque Value
Minimum value (cold)
1.24 N-m (11in-lbs).
1.58 N-m (14in-lbs).
3.39 N-m (30in-lbs).
Do NOT tighten fitting nuts at elevated
temperatures.
plumbing connections will result.
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Maximum value (cold)
1.8 N-m (16 in-lbs).
3.2 N-m (28 in-lbs).
5.1 N-m (45 in-lbs).
Irreparable damage to the
Lufran Single Outlet Manual