Manual 26727
VariStroke-I (VS-I) Electro-hydraulic Actuator
Woodward
24
Fluid Cleanliness Level: ISO 4406 code 20/18/16 or cleaner
Output Cylinder Action: Double
Hydraulic Connections
for
Integrated Actuators:
Hydraulic Supply Port: 1.250 SAE Code 61 Flange
Hydraulic Drain Port: 1.500 SAE Code 61 Flange
Hydraulic Connections
for
Remote Servo:
Hydraulic Supply Port: 1.250 SAE Code 61 Flange
Hydraulic Drain Port: 1.500 SAE Code 61 Flange
Control ports C1 and C2: 1.000 SAE Code 61 Flange
Actuator and Servo OVBD: .438-20 UNF
Pipe Size Between
Remote Servo and
Cylinder:
Diameter: 25.4 mm (1 inch) minimum
Length: 3 m (120 inch) maximum
Supply Fluid Flow: Refer to following figures for Maximum Transient Flow Rate and Steady
State Flow Rate Requirements:
Figure 2-1. VSI Maximum Transient Flow Rates (During Full Slew)
The figure above shows the estimated hydraulic flow necessary to
maintain optimum performance of the VS-I. If the flow supplied to the
actuator is lower than what is specified, the actuator will continue to
operate, but at reduced performance.
0
100
200
300
400
500
600
0
5
10
15
20
25
30
35
Fl
ow
R
a
te
(
Li
te
rs
P
e
r
M
inut
e
)
Pressure Drop (Bar)
VSI Maximum Transient Flow Rates (During Full Slew)
V45 Servo
Released