Moog 500 Series Specifications Page 3

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ELECTROHYDRAULIC VALVE SELECTION GUIDE
FREQUENCY OF SERVOVALVE 90˚ PHASE LAG – Hz
(SMALL TO MEDIUM SIGNAL RESPONSE)
FLOW WITH 1000 psi SERVOVALVE DROP - gpm
0.3
710 203040505
70
100 200 300 400 500
700
1000
0.4
0.5
0.2
0.7
1
3
4
5
7
10
2
30
40
50
70
100
20
200
300
400
500
1000
D665
D663
D662
D661
72
D633
D634
D765 HR
G761/D765 STD
D765 SHR
79-200 HR
79-200
79-100
D68X
D664
G631
Moog offers the broadest line of Electrohydraulic Valves on
the market today. Our product line consists of Servovalves
(Mechanical and Electric Feedback versions) and Servo-
Proportional Valves (Direct Drive and Two Stage ServoJet
®
versions). Servovalves typically utilize a ISO10372 mounting
pattern and are nearly always zero lapped or axis cut (no
mechanical deadband). Servo-Proportional Valves utilize an
ISO4401 mounting pattern and may have a mechanical deadband.
Selection of the proper valve involves understanding the
performance requirements of your application.The chart below
attempts to categorize the more popular Moog valve series by
two very important selection criteria – flow and dynamic response.
DDV VALVE
SERVOJET
®
SERVOVALVE
Selection
Selection
Selection
3
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