1 Scope
This part of GB/T 17213 establishes a partial basic terminology list and provides guidance on the use of all other parts of GB/T 17213.
This part is applicable to all types of industrial-process control valves (hereinafter referred to as control valves).
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.
IEC 60534 (all parts) Industrial-process Control Valves
3 Component Terminology
3.1
control valve
power-operated device which changes the fluid flow rate in a process control system. It consists of a valve connected to an actuator that is capable of changing the position of a closure member in the valve in response to a signal from the controlling system
3.1.1
control valve with a linear motion closure member
3.1.1.1
diaphragm valve
valve in which a flexible closure member isolates the line fluid from the actuating mechanism and provides a seal to the atmosphere
3.1.1.2
gate valve
valve whose closure member is a flat gate that moves in a direction parallel to the plane of the seat
3.1.1.3
globe (angle) valve
valve in which the closure member moves in a direction perpendicular to the plane of the seat(s)
