21EATON Vickers
®
Proportional Valves KBFD/TG4V-5 V-VLPO-MC008-E1 April 2009
Application Data
Fluid Cleanliness
Proper fluid condition is essential for long and satisfactory
life of hydraulic components and systems. Hydraulic fluid
must have the correct balance of cleanliness, materials
and additives for protection against wear of components,
elevated viscosity and inclusion of air.
Recommendations on contamination control methods
and the selection of products to control fluid condition
are included in Eaton’s publication 9132 or 561, “Vickers
Guide to Systemic Contamination Control”. The book also
includes information on the Eaton’s concept of “ProActive
Maintenance”.
The following recommendations are based on ISO
cleanliness levels at 2 µm, 5 µm and 15 µm:
For products in this catalog the recommended levels are:
0 to 70 bar (1000 psi) . . . . . . . . . . . . . . 18/16/13
70 + bar (1000 + psi) . . . . . . . . . . . . . . . 17/15/12
Eaton products, as any components, will operate with
apparent satisfaction in fluids with higher cleanliness codes
than those described. Other manufacturers will often
recommend levels above those specified.
Experience has shown, however, that life of any hydraulic
components is shortened in fluids with higher cleanliness
codes than those listed above. These codes have been
proven to provide a long trouble-free service life for the
products shown, regardless of the manufacturer.
Hydraulic Fluids
Materials and seals used in these valves are compatible
with antiwear hydraulic oils, and non-alkyl-based phosphate
esters. The extreme operating viscosity range is 500 to
13 cSt (2270 to 70 SUS) but the recommended running
range is 54 to 13 cSt (245 to 70 SUS). For further technical
information about fluids see “Technical Information” leaflet
B-920 or I-286S.
Installation
The proportional valves in this catalog can be mounted in
any attitude, but it may be necessary in certain demanding
applications, to ensure that the solenoids are kept full
of hydraulic fluid. Good installation practice dictates that
the tank port and any drain port are piped so as to keep
the valves full of fluid once the system start-up has been
completed.
Mounting Bolt Kits
For K(B)FD/TG4V-5
BKDG01633M (metric)
BK869705 (inch)
If not using Eaton recommended bolt kits, bolts used should be to ISO 898, 12.9 or better.
Seal Kits
KFD/TG4V-5 . . . . . . . . . . . . . . . . . . . . . . . . 565110
KBFD/TG4V-5-1* . . . . . . . . . . . . . . . . . .02-332751
Plugs
KBFDG4V
7-pin plug (metal) . . . . . . . . . . . . . . . . . . . . 934939
7-pin plug (plastic). . . . . . . . . . . . . . . . . . . . 694534
(metal plug must be used for full EMC protection)
NOTE: An alternative metal connector which gives EMC
protection but not IP67 rating is available from ITT-Cannon,
part number CA06-COM-E-14S-A7-S.
KFDG4V
Solenoid (black) . . . . . . . . . . . . . . . . . . . . . 710775
Solenoid (gray) . . . . . . . . . . . . . . . . . . . . . . 710776
LVDT (gray) . . . . . . . . . . . . . . . . . . . . . . . . . 458939
Extension Cable
Extension Cable: Adapter for extending seven core cable
when changing from KA to KB valve and existing wiring is
not long enough. Consists of a 7-pin plug, a 7-pin socket
and a length of cable, fully assembled for ease of use.
Extension Cable . . . . . . . . . . . . . . . . . . . . . 944450
Service Information
The products from this range are preset at the factory for
optimum performance; disassembling critical items would
destroy these settings. It is therefore recommended that
should any mechanical or electronic repair be necessary
they should be returned to the nearest Eaton repair center.
The products will be refurbished as necessary and retested
to specification before return.
Field repair is restricted to the replacement of the seals.
NOTE: The feedback/solenoid assembly installed in this
valve should not be disassembled.