Eaton VICKERS SystemStak Manual page 22

Further Information
Mounting Bolts,
Subplates and Manifold
Blocks
Mounting Bolts
The length of mounting bolt used to
install a SystemStak assembly is
dependent on the number of valves
being used, plus the length needed for
mounting other valves in the assembly,
such as:
– solenoid operated, or other type of
directional valve
– tapping plate
– blanking or crossover plate.
Vickers offers a large selection of bolt
kits (one bolt kit for these SystemStak
valves comprises 4 bolts) in metric and
inch sizes as listed. To determine your
needs, use the following guide for bolt
length calculation.
A = Bolt clamp length in directional valve, blanking
plate, crossover plate, etc.
B = Height of intermediate valve stack, comprising
Vickers SystemStak valve(s) plus tapping
plates, etc.
C = Depth of thread engagement in sub-plate/
manifold block:
8/10 mm (0.3/0.4I), valid for:
315 bar (4500 psi) when using cast iron or
steel subplates/manifold blocks, or 210 bar
(3045 psi) when using Vickers aluminium
alloy manifold blocks.
L = Required bolt length; select from the table.
Notes
1. Bolts should be torqued to 7-9 Nm (63-80 lbf in)
with threads lubricated.
2. If not using Vickers bolt kits, bolts must be to
Grade 12.9 (ISO 898) or better.
Bolt Kit Selection
Metric: M5-6g
Length
(mm)
50
60
70
80
90
100
110
120
130
140
150
160
170
Subplates and Manifold Blocks
See "Subplates and Auxiliary
Connection Plates" catalog 2425.
Hydraulic Fluids
Materials and seals used in these valves
A
are compatible with :
Anti-wear petroleum oils
Water glycols
Invert emulsions
L
B
Non-alkyl based
phosphate esters
The extreme operating range is 500 to
13 cSt (270 to 70 SUS) but the
C
recommended running range is 54 to 13
cSt (245 to 70 SUS). For further
technical information about fluids see
694.
Filtration Requirements
Recommendations on filtration methods
and the selection of products to control
fluid condition are included in Vickers
publication 561 or 9132. For products in
this catalog the recommended fluid
cleanliness levels are:
Up to 210 bar (3050 psi)
Above 210 bar (3050 psi)
22
Vickers bolt
kit number
BKDG3699M
BK466836M
BK464125M
BK466837M
BK466838M
BK466839M
BK466840M
BK466841M
BK466842M
BK466843M
BK466844M
BK466845M
BK466846M
. . . . . . . . L-HM
. . . . . . . . . . . . . . . . L-HFC
. . . . . . . . . . . . . . L-HFB
. . . . . . . . . . . . . L-HFD
. . . . . 18/16/13
. . . . 17/15/12
Inch: 10-24 UNC-3A
Length Vickers bolt
(in) kit number
2.0 BKDG3698
2.375 BK466849
2.75 BK870017
3.125 BK466850
3.5 BK466851
3.937 BK466852
4.312 BK466853
4.75 BK466854
5.125 BK466855
5.5 BK466856
5.937 BK466857
6.312 BK466858
6.687 BK466859
Temperature Limits
Ambient range . . . . . . . –20_C to +80_C
(–4_F to +176_F)
Fluid temperatures
Petroleum Water-
oil containing
Min. –20_C +10_C
(–4_F) (+50_F)
Max.* +80_C +54_C
(+176_F) (+129_F)
*
To obtain optimum service life from both fluid and
hydraulic system, 65_C (150_F) is the
recommended maximum fluid temperature, except
for water-containing fluids.
For other fluids where limits are outside
those of petroleum oil, consult fluid
manufacturer or Vickers representative.
Whatever the actual temperature range,
ensure that viscosities stay within those
specified under "Hydraulic Fluids".