K3VG Series - 27 / 34 Pages

LZ LZV / LX LXV Series
SUMMARY OF REGULATORS
model
control type
control curve
control method
explanation of function
symbol
Q
R1100
working pressure
Controls the outlet flow in accordance with torque control curve.
P
R1120
torque constant type
working pressure
Q
R1100 type with manual stroke limiter.
(It is adjustable to control the maximum outlet flow by manual operation.)
operation by handwheel
PL
working pressure
R1130
P
PL
R1100 type with hydraulic stroke limiter.
(It can control the maximum outlet flow by the pilot hydraulic pressure.)
operation by pilot pressure
Pilot pressure PL
Delivery pressure
Q
R1602
two step flow type
pilot pressure
max. 3.9 MPa
(40 kgf/cm2)
PL
PL
PL
operation by changing pilot
pressure
1
10
1
10
PL
pilot pressure
1.5 4.9 MPa
(15 50 kgf/cm2)
Controls the maximum and minimum outlet flow by changing the allocation of the pilot
fluid.
P
Q
R1220
pressure constant type
working pressure
Q min
operation by handwheel
Controls to keep a constant system pressure regardless of change of the outlet flow. It
can control maximum outlet flow and setting pressure by manual operation. See Note
7 on Caution for instruction (57 page) about the minimum outlet flow rate Q min.
P
Q
R2600
stepless flow control type
P
operation by handwheel
Controls the outlet flow steplessly by manual operation.
Q
Q
Q
PS
hydraulic remote control
Q
MPa
(kgf/cm2)
ROTAS
EH
1.
2.
P
P
"ROTAS" (electric-hydraulic rotary servo actuator), which generates large output torque
in proportion to low level electric signal, can control the outlet flow steplessly.
Q
Q
Features
Specifications
responsibility
step response
0.3s (0
27 )
s
027
19.6(20)
030
50
40
30
s
027
L Z-50
20
1.47(15)
0
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Response time
0
Response time
L Z-
060
180
00
0.98(10)
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
5
L Z-
LZ
-1
L Z- 20
090
60
L Z-5
0
10
1.47(15)
2.45(25)
L Z-
L Z-26
-12
2
20
15
70
2.94(30)
25
LZ
090
linearity
19.6(20)
• LZ-260, LZ-500
30
2.94(30)
2.45(25)
PS
servo pressure
2.0 4.9MPa
(20 50kgf/cm2)
Relationship between response time and required servo pressure / servo flow
LZ-180
180

frequency response 3Hz ( 12.5° 3dB)
1
hysteresis
(0.5
/less than 0.5 )
• LZ-030
L Z-
Good linearity and low level hysteresis.
By receiving various electrical signals, it enables
remote control systems and feed-back control systems.
A feed back mechanism is included inside, making
the system simple (outside feed back is not necessary, unlike in servo valves).
Contamination-resist capability is improved compared with servo valve control.
PS
60
L Z-0
30
51
Q
Q
L Z-
4.
Q
E
V
pilot pressure
max. 4.4MPa
(45kgf/cm2)
Q
L Z-0
3.
E
P
PL
Controls the outlet flow steplessly by changing the pilot hydraulic pressure.
It is able to add the torque constant control function to the above function.
PL PL
Q
Q
stepless flow control type or torque
constant type
P
P
Q
electric-hydraulic remote control
Q
Required servo flow Qs L/min
0.98 4.4
10 45
Q
Q
2
Servo pressure Ps MPa kgf/cm
Pi
Pi
P
Required servo flow Qs L/min
stepless flow control type or torque
constant type
P
2
Servo pressure Ps MPa kgf/cm
R3041
Q
PS
servo pressure
2.0 4.9MPa
(20 50kgf/cm2)
0.98(10)
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Response time
s
027
LZ-260
10
0
0.00 0.05 0.10 0.15 0.20
0
0.25 0.30 0.35 0.40 0.45 0.50
Response time
s
027
52

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Text version

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