GB 30439 consists of the following 18 parts under the general title of Safety requirements for industrial automation products:
——Part 1: General requirements;
——Part 2: Safety requirements for pressure (differential) transmitter;
——Part 3: Safety requirements for temperature transmitter;
——Part 4: Safety requirements for control valve;
——Part 5: Safety requirements for flowmeter;
——Part 6: Safety requirements for solenoid valve;
——Part 7: Safety requirements for control instrument;
——Part 8: Safety requirements for electrical actuator;
——Part 9: Safety requirements for digit display instrument;
——Part 10: Safety requirements for record instrument;
——Part 11: Safety requirements for programmable controller;
——Part 12: Safety requirements for time-of-flight (TOF) level meter;
——Part 13: Safety requirements for magnetostrictive liquid level meter;
——Part 14: Safety requirements for instrumental source of power;
——Part 15: Safety requirements for signal distribution, isolation and conversion units for industrial process measurement and control;
——Part 16: Safety requirements for differential-pressure flowmeter;
——Part 17: Safety requirements for ultrasonic flowmeter;
——Part 18: Safety requirements for auxiliary device of pressure instrument.
This is Part 4 of GB 30439.
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1 Scope
This part of GB 30439 specifies the safety requirements of industrial process control valves for protection against electric shock, mechanical hazard, flame spread from inside to outside of equipment, excessive high temperature, fluid and fluid pressure effect, explosion and implosion.
This part does not include the reliable function, performance or other characteristics of control valves not related to safety, the effectiveness of transportation packaging, the electromagnetic compatibility (EMC) requirements, the protective measures against explosive environment as well as the installation, commissioning and maintenance (repair).
This part is applicable to electrical actuators or pneumatic actuators and valves as well as control valves consisting of positioners or electro-pneumatic convertors configured according to the intended use.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1633-2000 Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST)
GB/T 4207-2003 Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions
GB 4208-2008 Degrees of protection provided by enclosure (IP code)
GB/T 4213-2008 Pneumatic industrial process control valves
GB 4793.1-2007 Safety requirements for electrical equipment for measurement, control and laboratory use - Part 1: General requirements
GB/T 5169.16-2008 Fire hazard testing for electric and electronic products - Part 16: Test flames - 50W horizontal and vertical flame test methods
GB/T 5465.2-2008 Graphical symbols for use on electrical equipment - Part 2: Graphical symbols
GB/T 11021-2007 Electrical insulation - Thermal classification
GB/T 11918-2001 Plugs, socket-outlet and couplers for industrial purposes - Part 1: General requirements
GB/T 11919-2001 Plugs, socket-outlets and couplers for industrial purposes - Part 2: Dimensional interchangeability requirements for pin and contact-tube accessories
GB/T 12113-2003 Methods of measurement of touch current and protective conductor current
GB/T 16842-2008 Protection of persons and equipment by enclosures - Probe for verification
GB/T 16927 (All parts) High-voltage test techniques
GB/T 16935.3-2005 Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution
IEC 60027 Letter symbols to be used in electrical technology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 4793.1-2007 and the following apply. For the convenience of application, some terms and definitions in GB 4793.1-2007 are listed repeatedly as follows.
