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Proportional two-stage directional control valves


SKD Proportional two-stage directional control valves with the spool-type main stage, SK pilot stage and integrated electronics are throttling directional valves used in the systems to control force, velocity and travel of actuators.


Specifications

Description

1 SKD
16.3.43
1 SKD
25.3.43
1 SKD
25.3.44
2 SKD
25.3.44
1 SKD
40.3.44
SKD design
two-stage
Number of hydraulic lines
3
4
Pilot stage
02 SK6 / 05 SK6
01 SK10
A, B,T , P ports diameter, mm
16
24
38
Max stage inlet pressure, MPa:
on individual and lines:
- main stage
- pilot stage
on connected and lines

32
21
21
Min pilot stage inlet pressure, MPa
4
2.5
2.5
3
1.5
Max stage outlet pressure, MPa:
  for individual and Y lines:
- main stage
- pilot
  for connected and Y lines

32
3
3
Nominal main stage flow at Δ=1 MPa, l/min
50
100
150
200
250
300
350
150
200
250
150
200
250
300
400
500
600
Max leak flow in the main stage neutral at Δ=21 MPa and spool and sleeve, l/min:
- (<3% shutoff)
- F (5% shutoff)
- (10% shutoff)
- (20% shutoff)


1.5
1.0
0.5
0.4


2.5
-
-
-


1.8
1.0
-
-


1.8
1.0
-
-


3.5
2
-
-
Pilot stage feeding  Δ=16 MPa, l/min
10
45
Spool travel, mm:
- nominal
- maximum

±2.5
±4

±3.5
±5

±3.5
±5

±3.5
±5

±5
±6
Flow hysteresis, mA
≤ 1
≤ 1.6
Max zero shift, %
1
Switching time / Time of spool travel to the end point, ms:
- at Δ=5 MPa
- at Δ=5 MPa

25
-

70
-

70
-

35
-

-
70
Working fluid Mineral oil
Working fluid temperature, º 0...60
Working fluid viscosity at t=50º, cSt 5...0
Working fluid contamination class according to GOST 17216-2001

-recommended
-permissible
For pilot stage:
02SK6                            05 SK6
10                                   12
12                                   13


12
13
Nominal current range, 4÷20/ ±20
Integrated electronics supply voltage, V ±15/ =18.36/ ~12.24
Peak-to-peak supply voltage ripple ±15V, V
± 15V
= 18.36
~ 12.24
≤ 0.15
not rated
not rated
Power consumption, W ≤ 6
Mounting position optional
Weight, kg 18 38 42 45 125



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