Compressors / compressed air - Aircraft

Compressed air line systems - Ø 15-28 mm
Assembly instructions for plastic tube lines
In order to guarantee a safe and this way perfect installation,
please note the following points:
· The pipe clamps need to be mounted in a way that the pipe has
enough clearance to shift it to and fro
· There must be no burr at the ends of the tubes in order to avoid
damages at the O-rings of the connector
· Provide the tubes with a chamfer in order to facilitate the assembly
· Cut the tubes with pipe shears RS 28 (Item No 215 1528) in order to
achieve an optimum separation (90°)
· In order to avoid loss of pressure in the system, make sure to plug the
tubes always up to the limit stop into the connector
(also see marking on the connector)
· For the installation of the compressed air piping system around a pillar,
please observe the longitudinal extension of the tubes and connectors
(recommended distance from the wall about 30 mm)
Correction factors length extension
Correction factors for the length extension of plastic tubes:
Tube (smooth) Factor 1.5
Tube (middle) Factor 1.3
Tube (hard) Factor 1.0
Exemplary calculation:
The compressed air pipe (hard tube) with a length of 150 m which is laid in
a hall where the environmental temperature is between +15 to +40°C
( T is 25°C) will extend by: l = 1.0 x 10 -4 /°C x 150 x 25°C
l = 0.375 m
Easily extending an
existing tube system
The plug connectors and tubes can be used to
install a self-contained system
or extend or modify an existing tube system
(refer to the right).
Description of the water separator system
1. 2.
water separator for 28 mm
compressed air line systems
You can construct a water separator
for 28 mm compressed air line
systems with a standard T-piece, item
No. 215 2828 and the brass insert,
item No. 215 2829.
1. Insert the short part of the insert, item No 215 2829
into the plastic tube or into the copper tube.
2. Plug the tube with the insert up to the limit stop into the T-piece.
By a 1/4 turn of the screw cap, the holding system is double
protected. This way, the penetration of water into the stub is
prevented.
· For the installation of several vertical tubes we recommend to mount
first the pipe clamps of the horizontal piping which put the system under
pressure and in the second step the vertical clamps and connectors.
This way you can avoid that the vertical tubes are oblique after the
installation.
· If there is no refrigeration dryer in the installation of the compressed
air piping system, it is recommended to use our T-connectors with
integrated water separator (Item No. 215 2222). This way the condensed
water can be collected at a certain point.
· For the installation of the compressed air piping system a correct heat
extension calculation needs to be performed first in order to avoid the
bending of tubes and connections.
The specific coefficient for the length extension (lK) for polyamide =
10 -4 /C° corresponds to 0.1 mm/°C.
The formula to calculate the length extension:
l = factor x lK (10 -4 /C°) x length of the tube (l) x temperature ( T)
Using a straight screw-in connector
Using a screw coupling
Using a screw-in connecting piece
Wet air
Water
separator
Dry
air
By the water separator-
T-connector the so-called "goose
necks“ do not apply since, because
of the fully developed technique, a
penetration of water to the branch
lines is prevented.
When installing this connector,
make sure that a horizontal tying
of the connector is guaranteed. The
connector is marked accordingly, so
that a wrong assembly is prevented.
118 Built according to CE directives