Moog D680 Series - Page 12

12Rev. C, April 2017
TECHNICAL DATA Moog D680 Series Proportional Control Valves
SIZE 05 - D681 PROPORTIONAL VALVE
12
TECHNICAL DATA
Rev. C, April 2017
Moog D680 Series Proportional Control Valves
SIZE 05 - D681 PROPORTIONAL VALVE
Step Response Frequency Response
With pilot valve D633 unbiased
100
75
0 5 10 15 20
50
25
0
Stroke [%]
Time [ms]
70 bar
(1,000 psi)
140 bar
(2,000 psi)
With pilot valve D633 unbiased
25 %
10 %
90 %
101 100 200
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude ratio [db]
Phase lag [degree]
Frequency [Hz]
Step Response Frequency Response
With pilot valve D633 biased
100
75
0 5 10 15 20
50
25
0
Time [ms]
Stroke [%]
70 bar
(1,000 psi)
140 bar
(2,000 psi)
With pilot valve D633 biased
25 %
10 %
90 %
101 100 200
-12
-9
-6
-3
Amplitude ratio [db]
Frequency [Hz]
0
-30
-60
-90
-120
-150
0
3
Phase lag [degree]