gefran MK4 Series Installation Manual page 4

SErIE IK4/SK4 - INSTallaZIONE IN INTErNO CIlINDrO
Inactive
IK4-S/C
IK4-A 0...1000
IK4-A 1250...4000
SK4
For the correct installation of rod-type magnetostrictive transducers in hydraulic cylinders, remember that the cylinder head,
must be made of non-magnetic material where the threaded hole will be drilled to install the transducer.
If not, the residual magnetisation caused by drilling the threaded hole must be less than 4 Gauss.
Rod-type magnetostrictive transducers are available with two types of threads: M18x1.5 or 3/4"-16 UNF.
Refer to the drawings in figures 5 and 6 for the dimensions and tolerances to be respected when drilling the threaded holes
and the related sealing surfaces. The sealing surface must be free of spiral or longitudinal scratches.
• Ro 1,6 µm for O-rings with NON-pulsing pressure
• Ro 0,8 µm for O-rings with pulsing pressure
Rod-type magnetostrictive transducers are always supplied with an O-ring. If you need to replace the supplied O-ring , see
the O-rings shown in figures 6 and 7.
Version with thread M18x1,5
Suggested O-Ring:
PARKER 6-349 15,4x2,1
Material Viton 90° Shore-A
Mixes PARKER N552-90
Version with thread 3/4"-16uNF
Suggested O-Ring:
PARKER 3-908 16,36x2,21
Material Viton 90° Shore-A
Mixes PARKER N552-90
4
A
C.E.
zone
ø 12.7
ø 10
Non-magnetic spacer
Floating magnet
B
47,5
47,5
47,5
27,5
B
Inactive
zone
a
63,5
55
60
50
Fig. 5
Fig. 6
Fig. 7
85190A_MAN_Installazione_MK4-IK4/SK4_11-2012_ENG
Non-magnetic head