Installing The Btl; Installation Recommendation For Hydraulic Cylinders - Balluff BTL7-S5-Serie Betriebsanleitung

BTL7-S5 _ _ D-M _ _ _ _ -T _ 2/3-S32/KA _ _ /FA _ _
Magnetostrictive Linear Position Sensor – Rod Style
4
Installation and connection (continued)
4.3

Installing the BTL

NOTICE
Interference in function
Improper installation can compromise the function of the
BTL and result in increased wear.
► The mounting surface of the BTL must make full
contact with the supporting surface.
► The bore must be perfectly sealed (O-ring/flat seal).
Appropriate nuts for the mounting thread (for
BTL7...-TZ/TB...) are available as accessories
(see page 21).
► Make a mounting hole with thread (possibly with
countersink for the O-ring) acc. to Fig. 4-3, Fig. 4-4 or
Fig. 4-5.
► Screw the BTL with mounting thread into the mounting
hole (max. torque 100 Nm for M18×1.5 and 3/4"-16UNF;
max. 150 Nm for M30×1.5).
► Install the magnet (accessory).
► From 500 mm nominal length: support the rod and
attach it at the end if necessary.
4.3.1 Installation recommendation for hydraulic
cylinders
If you seal the bore with a flat seal, the max. operating
pressure will be reduced in accordance with the larger
pressurized surface.
If installing horizontally in a hydraulic cylinder (nominal
lengths > 500 mm), we recommend affixing a slide element
to protect the rod end from wear.
Dimensioning of the detailed solutions is the
responsibility of the cylinder manufacturer.
The slide element material must be suitable for the
appropriate load case, medium used, and application
temperatures. E.g. Torlon, Teflon or bronze are all possible
materials.
Slide element
Fig. 4-6: Example 1, BTL installed with slide element
10 english
Magnet
The slide element can be screwed on or bonded.
► Secure the screws so they cannot be loosened or lost.
► Select a suitable adhesive.
Piston rod
Rod
Slide element
Fig. 4-7: Detailed view and top view of slide element
There must be a gap between the slide element and piston
bore that is sufficiently large for the hydraulic oil to flow
through.
Options for fixing the magnet:
– Screws
– Threaded ring
– Press fitting
– Notches (center punching)
If installed in a hydraulic cylinder, the magnet
should not make contact with the rod.
The hole in the spacer ring must ensure optimum guidance
of the rod by the slide element.
Magnet
Fixing of magnet
Spacer ring
Fig. 4-8: Fixing of magnet
An example of how to install the BTL with a supporting rod
is shown in Fig. 4-9 on page 11.
Slide surface
Flow gap