Level limit switch
Series VN 1000 / 2000 / 5000 / 6000
Technical information / Instruction manual
page
Assembly VN ..040
Manufacturing of the Extension tube
Obtain instruction manual for proper manufacturing of the extension tube. In case of deviation
from the instruction manual the unit is not safe for use in Hazardous Locations.
Demands on the
Extension tube
Material: Stainless steel 1.4301 (SS304) or 1.4305 (SS301) or 1.4571 (SS316Ti) or 1.4404 (SS316L)
The tube must be manufactured from one single piece. It is not allowed to weld two or more pieces
together.
Carefully observe max. length, diameter, wall thickness, thread, tolerances as specified in the drawing.
All sharp edges must be removed to protect the cable and sealing rings.
Thread testing
Each thread must be tested with no-go ring gauge according to standard DIN ISO 228-1 (G1“) (G-version)
or ANSI B 1.20.1 (NPT 1“) (NPT version)
Version with G1” (DIN ISO 228-1) thread
(selection price list pos.5 A,L,M)
Version with 1” (ANSI B 1.20.1) NPT thread
(selection price list pos.5 B,S,T,U)
Thread 1” NPT ANSI B 1.20.1
Effective thread length:
17.3 +2 mm (0.68 +0.08“)
(dimension L2 according to
standard ANSI B 1.20.1)
free from
burrs
same as the
other end
same as the
other end
free from
burrs
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iv
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hr
ea
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en
gt
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Pipe length X:
VN 1040: X = L - 180 mm (X = L - 7.1")
VN 2040: X = L - 250 mm (X = L - 9.8")
VN 2040 with pos.26 x,a,b: X = L - 275 mm (X = L - 10.8")
Note: L is the total extension length
Pipe length X:
VN 1040: X = L - 190 mm (X = L - 7.5")
VN 2040: X = L - 260 mm (X = L - 10.2")
VN 2040 with pos.26 x,a,b: X = L - 285 mm (X = L - 11.2")
Note: L is the total extension length
Vibranivo
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VN 1000 / 2000 / 5000 / 6000 g
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