Hydraulic fluid power—Solenoid operated directional poppet valve
1 Scope
This standard specifies the basic parameters, technical requirements, test methods, inspection rules, marking, packaging and other requirements of solenoid operated directional poppet valve (hereinafter referred to as “solenoid poppet valve”).
This standard is applicable to the solenoid poppet valves with hydraulic oil or other liquids with equivalent performance as the operating medium.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this code are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest editions apply.
GB/T 786.1 Fluid power systems and components—Graphic symbols and circuit diagrams (GB/T 786.1-1993, eqv ISO 1219-1: 1991)
GB/T 2346 Fluid power systems and components—Nominal pressures (GB/T 2346-2003, ISO 2944: 2000, MOD)
GB/T 2514 Hydraulic fluid power—Four-port directional control valves—Mounting surface (GB/T 2514-1993, eqv ISO 4401: 1980)
GB/T 2828.1 Sampling procedures for inspection by attributes—Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.1-2003/ISO 2859-1: 1999)
GB/T 7935 Hydraulic fluid power—General requirements for hydraulic components
GB/T 14039-2002 Hydraulic fluid power—Fluids—Method for coding the level of contamination by solid particles (ISO 4406: 1999, MOD)
GB/T 17446 Fluid power systems and components—Terminology (GB/T 17446-1998, idt ISO 5598: 1985)
GB/T 17489 Hydraulic fluid power—Particulate contamination analysis—Extraction of fluid samples from lines of an operation system (GB/T 17489-1998, idt ISO 4021: 1992)
JB/T 7858 Method to determine cleanliness and acceptance criterions for hydraulic components
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3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 17446, as well as the following apply.
3.1
nominal flow
nominal flow of solenoid poppet valve
3.2
test flow
specified flow when testing the performance of the tested valve
3.3
solenoid operated directional poppet valve
valve that can realize reversing and opening and closing functions by electromagnetically controlling the movement of a spherical or conical element
4 Dimension, symbols and units
See Table 1 for dimension, symbols and units.
5 Marking and basic parameters
5.1 Marking
Clear and permanent markings or nameplates shall be provided at appropriate and obvious positions on the products. The contents of the marking or nameplate shall meet the requirements of GB/T 7935, and the graphic symbols used shall meet the requirements of GB/T 786.1.
Table 1 Dimension, symbols and units
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Dimension, symbols and units
5 Marking and basic parameters
5.1 Marking
5.2 Basic parameters
6 Technical requirements
6.1 General requirements
6.2 Performance requirements
6.3 Assembling requirements
6.4 Appearance requirements
7 Test method for performance
7.1 Test device
7.2 Test conditions
7.3 Test items and methods
8 Inspection of assembly and appearance
9 Inspection rules
9.1 Inspection classification
9.2 Sampling
9.3 Judgment rules
10 Marking and packaging
Annex A (Normative) Test circuit and characteristic curve
A.1 Test circuit
A.2 Characteristic curves
Figure A.1 Test circuit diagram
Figure A.2 Flow-pressure loss curve
Figure A.3 Operating range
Figure A.4 Block diagram of test system
Figure A.5 Displacement-time transient response curve of element
Figure A.6 Outlet pressure-time transient response curve
Table 1 Dimension, symbols and units
Table 2 Basic parameters
Table 3 Internal cleanliness index
Table 4 Allowable variation range of average display value of controlled parameters
Table 5 Permissible error of measurement system
Table 6 End-of-manufacturing test item and test method
Table 7 Type test items and test methods
Table 8 Inspection of assembly and appearance
