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Directional control valves - Hydraulic components POCLAIN HYDRAULICS
4/2, 4/3 WAY DIRECTIONAL VALVE KV-5KL (NG 6)
• NG 6
• Up to 350 bar [5
076 PSI]
• Up to 80 L/min [21 GP
M]
• Connection diagram and connecting dimensions ISO 4401
• 5-chamber model with good spool guidance
• Optimized flow paths for low losses of pressure
• Low internal leakage
• Wet pin solenoid with interchangeable coil
• Manual emergency control
• Fulfil EMC (89/336/EEC)
• Packaging in carton box
KV-4/3-5KL-6
Operation Hydraulic symbols
Directional valves type KV with direct solenoid operation control the direction of the hydraulic
medium flow.
A valve basically consists of a housing (
1), one or two solenoids (2a, 2b), control spool (3) and
return spring (4).
In 4/3 way directional valves the centre position of th
e spool is defined by 4 return springs
which hold the spool in the neutral position. The change over to the operating position (a) or (b)
is done by energizing the solenoids (2a/ 2b) respectively, whereby the solenoid plunger acts on
the control spool (3) via the operating pin (5), thus clearing the corresponding flow ways and
establishing relevant links between ports P, A, B and T. When the solenoid (2a/ 2b) is
deenergized, the control spool (3) is returned to neutral position by the return spring (4).
In 4/2 way directional valves the centre position of th
e spool is defined by return spring on the
opposite side of the solenoid (2a or 2b).
Change-over of the control spool (3) can be done ma
nually by pressing the pin (6) for
emergency manual override in the solenoid core.
Solenoid coil is fastened to the solenoid core (7)
by retaining nut (8). Position of the coil
(orientation of the connector) is pre-defined by the positioning hole on the valve housing and by
the fixation pin (9) on the coil.
Spool types
Features
Hydraulic
Size 6
Flow rate L/min [GPM] see 'P-Q curves
Operating pressure
Ports A, B, P bar [PSI] 350 [5 076]
Port T bar [PSI] 250 [3 6
25]
Viscosity range mm
2
/s [SUS]
15 to 380 [69.5 to 1 760]
Oil temperature range °C [°
F]
-20 to +70[-4 to 158]
Filtration ISO 4406:1999
19/17/14
Mass
4/2
kg [lb]
1,6 [3.6]
4/3
2,2 [4.9]
Mounting position
Optional
Electrical
Supply voltage
Direct
V
12, 24, 48
Alternating
110, 230
Max. allowable voltage variation
+/- 10 %
Power W
31
Switch-on time* ms
200 to 260
Switch-off time* ms
100 to 120
Switching frequency 1/h
15 000
Ambient temperature °C [°
F] to 50 [122]
Coil temperature °C [°
F] to180 [356]
Duty cycle Continuous
Protection class to EN 50529 / IEC 60529
- Connector EN 175301
- Connector AMP
- Connector Deutsch
- IP65
- IP65
- IP69K
* Measured on unloaded valve
'P-Q Performance curves 'P-Q Operating limits
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
1
2
3
4
5
6
0 1020 3040 50 607080
bar [PSI]
0
l/min
[GPM]
2.6 5.3 7.9 10.6 13.2 15.9 18.5 21.1
29
58
87
116
145
174
203
232
261
290
319
348
377
406
435
Measured at 50°C [122°F] and viscosity of 32 mm
2
/s [148 SUS].
Flow path
Spool
P-A P-B A-T B-T P-T
1
5544-
2
3
3111
3
6
6333
6
3344-
51A, 51B
4422-
41A, 41B
44---
Diff. pressure
0
35
70
105
140
175
210
245
280
315
350
0 1020304050607080
507
1015
1522
2030
2538
3045
3553
4061
4568
5076
1
4
2
3
5
bar
[PSI]
0
l/min
[GPM]
2.6 5.3 7.9 10.6 13.2 15.9 18.5 21.1
Diff. pressure
Measured at 50°C [122°F] and viscosity of 32 mm
2
/s [148 SUS].
Spool
Curve
1
1
2
2
3
3
6
4
51A, 51B
1
41A, 41B
5
The operating limits of the valve are
determined at a voltage 10% below
the nominal rating. The curves refer
to application with symetrical flow
throw the valve (P-A and B-T). In the
case of asymetric flow (e.g. one part
not used) reduced values may result.
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POCLAIN HYDRAULICS Hydraulic components - Directional control valves
Mechanically operatedElectrically operated Hydraulically operated
Dimensions
c
0,01/100
Rmax 4
A
A
B
B
APB
APB
Ø 5,3
[0.21 dia.]
78 [3.07]
253 [9.96]
22
[0.87]
87 [3.43]
Ø 9,2
[0.36 dia.]
50
[1.97]
53 [2.08]
34,5
[1.36]
302 [11.89]
Ø 5,3
[0.21 dia.]
78 [3.07]
53 [2.08] 59 [2.32]
Ø 9,2
[0.36 dia.]
87 [3.43]
50
[1.97]
22
[0.87]
Max. torque 5,5 ±10% Nm
Max. torque 0,5 ±10% Nm
46
[1.81 ]
+0,5
-0,5
+0.2
-0.2
32,5
31
40,5
[1.59]
[1.28]
[1.22]
158 [6.22]
74
[2.91]
226 [8.90]
A
P
B
T
Required quality of the
mating surface.
KV-4/2-5KL-6
KV-4/3-5KL-6-G-...
KV-4/3-5KL-6-C-...
Connection diagram and
connecting dimensions to
ISO 4401.
Manual override with
ruber cover
Lockable manual
override
Cartridge throttle
If flow rates greater than permissible occur during change-over,
a cartridge throttle must be fitted into P-line of the directional valve.
(option D08/D10/D12 in the model code)
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Directional control valves - Hydraulic components POCLAIN HYDRAULICS
Valve assembly- spare parts
1. Solenoid coil “a” - Type MR-045-O (by default) or type SR-045-O (option S1 in model code)
2. Solenoid coil “b” - Type MR-045-O (by default) or type SR-045-O (option S1 in model code)
3. Solenoid core - Type MR-045-O (by default) or type ACTUATOR SR-045 (option S1 in model code)
4. Fixing screws 4 pcs M5x30 to ISO 476210.9, not supplied eith the valve; must be ordered separately
Required tightening torque: 9
+/- 10%
Nm - steel tapped holes, 7
+/- 10%
Nm - aluminium tapped holes
5. Plug-in connector EN 175301-803 “a” - grey - Type MR-K-A
6. Plug-in connector EN 175301-803 “b” - black - Type MR-K-B
7. Retaining nut - Type MR-045-M (by default) or type SR-045-M (option S1 in model code)
8. Retaining nut for manual override with rubber cover - Type MR-045-M-G (by default) or type SR-045-M-G (option S1 in model code)
9. Retaining nut for lockable manual override - Type MR-045-M-C (by default) or type SR-045-M-C (option S1 in model code)
10. O-ring Fl 9,25x1,78
11. O-ring Fl 17x2
12. O-ring Fl 26x2
13. O-ring FI 22x1,5
14. Protection plate
15. Nameplate
Detail technical data regarding the solenoids and Model codes for ordering are available in catalogue
chapter SOLENOIDS.
Model code
Part number
Work order/Date of production
Without coilDeutsch connectorAMP Junior timer
connector
EN 175301-803
connector
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POCLAIN HYDRAULICS Hydraulic components - Directional control valves
Mechanically operatedElectrically operated Hydraulically operated
Model code
K
Spool types
11A 1B
22A 2B
33A 3B
66A 6B
51A 51B
41A 41B
Port T in the valves with spool type 41A and 41B must be used as leakage line when working pressure is over
250 bar [3 625 PSI].
/ KV- -5-L-6
Number of control spool positions
Two positions
2
Three positions
3
Working ports
Four working ports
4
Manual override option
Emergency manual override
No designation
Manual override with rubber cover
G
Lockable manual override
C
L
Internal leakage
L Low leakage spool
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Seal type
NBR seals for mineral oil HL,HLP to
DIN 51524
No designation
FPM seals for HETG, HEES, HEPG to
VDMA 24568 and ISO 15380
E
Special options
Phosphate coated
-
Zinc coated
ZN
Solenoid type SR-045
S1
Painted
S3
- -
Overvoltage protection
Without overvoltage protection
No designation
With overvoltage protection
T
Throttle mm [in]
Without throttle in P line
No designation
Throttle Ø 0,8 [0.03 dia.]
D08
Throttle Ø 1,0 [0.04 dia.]
D10
Throttle Ø 1,2 [0.05 dia.]
D12
Alternating voltage solenoids must be used with connector with
integrated rectifire bridge.
With solenoids of over 48 V an earthing clamp to ISO 4400 must
be connected
*To fulfil EMC (89/336/EEC) a capacitor must be built in.
Supply voltage
Direct voltage Alternating voltage
12 V
12 DC 12 AC
24 V
No designation
24 AC
48 V
48 DC 48 AC
110 V
110 DC 110 AC
230 V
230 DC 230 AC*
Without coil
WC WC
--
*
Coil terminal
EN 175301-803 without signal lamp
No designation
EN 175301-803 with signal lamp
L
EN 175301-803 without connector
K
AMP junior timer without connector
M
Deutsch without connector
V
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Mechanically operatedElectrically operated Hydraulically operated
