20/05/2020
VACUUM LEAK DETECTOR
VLR ..
and
VLR .. MV
- 21 -
5.4.2 Between leak detector and interstitial space
(1) Select and install suitable pipe
(2) During installation of the pipe, ensure that it is protected against
damage when the manhole chamber is entered
(3) Complete the relevant connection (according to the illustrations in
the following images)
5.4.2.1 Flanged screw connection (for flanged pipes)
(1) Lubricate O-rings
(2) Insert spacer ring loosely into the screw socket
(3) Slide union nut and pressure ring over the pipe
(4) Hand-tighten union nut
(5) Tighten union nut until need for increased force is clearly notice-
able
(6) Final assembly: Tighten by another ¼ turn
5.4.2.2 Clamping ring screw connection for metal and plastic pipes
(1) Insert support sleeve (only plastic pipes) into end of the pipe
(2) Insert pipe (with support sleeve) all the way to the stop
(3) Screw fitting up until the resistance rises sharply (~1¾ turns!)
(4) Loosen nut
(5) Tighten the nut by hand up to a noticeable stop
(6) Finish assembling the screw connection by tightening a ¼ turn
5.4.2.3 Quick screw connections for PA pipes
(1) Cut PA pipe to length at a right angle
(2) Unfasten union nut and slide over the end of the pipe
(3) Slide pipe onto nipple up to the beginning of the thread
(4) Hand-tighten union nut
(5) Wrench-tighten union nut until need for increased force is notice-
able (approx. 1 to 2 turns)
5.5 Electrical
Cables
The electrical connection lines should be resistant to the existing or
expected vapors and liquids.
Cross section of 1.0 mm
2
to 2.5 mm
2
Outer cable diameter of 5.5 to 13 mm. If other cable diameters are
used, the screw connections need to be replaced to provide proper
protection.
Mounting