Danfoss SystemStak DGM 5 Series Technical Information page 37

Bolt Extender Kits
ISO 4401-05 SystemStak valves may be mounted with either
standard cap screws or bolt extender kits.
Metric cap screws must be of Class 12,9 (ISO 898) strength,
minimum U.T.S. = 1200 MPa.
Inch threaded screws must conform to ANSI B18.3.
SystemStak
Valve Height Metric
mm (inch) Thread
50 (1.97) M6 x 1-6H
60 (2.36) M6 x 1-6H
Bolt extender cross section
5
4,0 ( / " ) hex
32
socket for
tightening
Inch
Kit Model Number Thread
BKE-6M-50M .2500-20 UNC
BKE-6M-60M .2500-20 UNC
Bolt Extende r
M6 x 1 or
.2500-20 thread
The use of Danfoss bolt extenders simplifies installation by
permitting each valve body to be separately installed with the
correct torque value. A major advantage of bolt extenders
is the ability to remove the directional valve for service or
replacement without disturbing the stack assembly. There are
4 bolt extenders per kit.
Kit Model Number
BKE-4-50M
BKE-4-60M
Example of bolt extenders on a typical SystemStak assembly
Directional
Valve
5
4 ( / " )
32
hex
socket
60
(2.36)
SystemStak Valve
5
4 ( / " )
32
hex
socket
50
(1.97)
SystemStak Valve
Manifold Block
Extender Torque
11,3-14,7 Nm (100-130 lbf in)
Standard
socket head
cap screw
Bolt extender
kit
BKE-6M-60M or
BKE-4-60M
Bolt extender
kit
BKE-6M-50M or
BKE-4-50M
12 (0.47) minimum
thread engagement
37