1 Scope
This standard specifies product classification, basic parameters, requirements, test methods, inspection rules, marking, packaging and storage of electrical control valves for industrial-process control systems (also referred to as electric regulator).
This standard is applicable to various electrical control valves (hereinafter referred to as control valve) consisting of electric actuator and valves that are in conformity with JB/T 8219.
This standard is not applicable to control valves having specific requirements such as operating under radiation conditions.
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 normative document (including any amendments) applies.
GB/T 13384 General Specifications for Packing of Mechanical and Electrical Product
GB/T 17213.3 Industrial-Process Control Valves—Part 3-1: Dimensions—Face-to-face Dimensions for Flanged, Two-way, Globe-type, Straight Pattern and Center-to-face Dimensions for Flanged, Two-way, Globe-type, Angle Pattern Control Valves
GB/T 17213.11 Industrial-Process Control Valves—Part 3-2: Dimensions—Face-to-face Dimensions for Rotary Control Valves Except Butterfly Valves
GB/T 17213.12 Industrial-Process Control Valves—Part 3-3: Dimensions—End-to-end Dimensions for Buttweld, Two-way, Globe-type, Straight Pattern Control Valves
GB/T 18271.1-2000 Process Measurement and Control Devices—General Methods and Procedures for Evaluating Performance—Part 1: General Considerations
GB/T 26815-2011 Terminologies for Industrial-Process Measurement and Control Instruments—Terms of Final Controlling Elements
JB/T 8219 Electrical Actuators for Industrial-Process Measurement and Control Systems
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 26815-2011 apply.
4 Product Classification and Basic Parameters
4.1 Product classification
4.1.1 By actuation mode
Classification by actuation mode of control valve:
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Product Classification and Basic Parameters
5 Requirements
6 Test Method
7 Inspection Rules
8 Marking, Packaging and Storage
Bibliography
Figure 1 Tapping
Table 1 Error Limit of Control Valve
Table 2 Maximum Seat Leakage
Table 3 Leakage Coefficient
Table 4 Calculation Formulae of Rated Valve Capacity
Table 5 Slope Deviation of Linear Flow Characteristic
Table 6 Slope Deviation of Equal Percentage Flow Characteristic
Table 7 Size of Standard Test Section
Table 8 Inspection Items
