This standard specifies terms, order requirements, performance requirements, technical requirements, inspection and test, quality certificate as well as marking, packaging, storage and transport of control valves for power station.
This standard is applicable to control valves used for steam and water system and fuel system of thermal generator set (control valves used for speed regulating system of steam turbine are not in this scope).
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 1047 Pipework Components - Definition and Selection of DN (Nominal Size) (GB/T 1047-2005, ISO 6708: 1995, MOD)
GB/T 1048 Pipework Components - Definition and Selection of PN (68/T 1048-2005, ISO/CD 7268: 1996, MOD)
GB/T 4213 Pneumatic Industrial Process Control Valves
GB/T 12221 Metal Calves - Face to Face, End to End, Center to Face and Center to End Dimensions (GB/T 12221-2005, ISO 5752: 1982, MOD)
JB/T 3595 Valves for Power Station - General Requirements
JB/T 5223 Pneumatic Long-stroke Actuators for Industrial-process Control System
JB/T 8219 Electrical Actuators for Industrial-process Measurement and Control Systems
3 Terms
For the purpose of this standard, the following terms apply.
3.1
control valve
device in process control system and used for regulating fluid flow through power control, which consists of actuator and valve, with the actuator capable of changing the position of throttling element in the valve according to the signal sent by control system
