BS 6697:1986
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Methods of test for electrohydraulic proportional control valves
Hardcopy , PDF
15-01-2000
English
30-04-1986
Foreword
Committees responsible
Method
1 Scope
2 Definitions
3 Symbols and units
4 Standard test conditions
5 Test installation
6 Electrical tests
7 Flow control tests
8 Pressure control tests
9 Endurance tests
10 Pressure impulse test
11 Environmental tests
12 Presentation of results
Appendices
A Guidance on conducting the tests
B Errors and classes of measurement
Tables
1 Symbols and units
2 Standard test conditions
3 Permissible systematic errors of measuring
instruments as determined during calibration
Figures
1 Typical steady-state test circuit for flow control
valves
2 Typical dynamic test circuit for flow control valves
3 Alternative test circuits for two-way pressure
control valves
4 Electronic impedance measurement test
5 Control flow versus input signal at constant valve
pressure drop
6 Control flow versus load pressure drop
7 Control flow versus fluid temperature
8 Transient responses of a flow control valve
9 Control pressure versus input signal
10 Control pressure versus flow
11 Graphical presentation of transient response of a
pressure control valve
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