I would like to ask about the letter codes used for valves
Thread Content
The last edit to this post was made by 99℃ on 2025-3-10 at 19:56. I’m wondering what letter codes are generally used for electric control valves and pneumatic control valves among our peers in this field; for example, some use XV, some use SV, some use HZ, some use HS, and some use MV
6 represents the pneumatic valve. For example, Q641F46-10C DN50 refers to a pneumatic fluoroplastic ball valve, with 9 indicating an electric valve. For example, Q941F46-10C DN100 is an electric fluorinated rubber ball valve
6 represents the pneumatic valve. For example, Q641F46-10C DN50 refers to a pneumatic fluoroplastic ball valve, with 9 indicating an electric valve. For example, Q941F46-10C DN100 is an electric fluorinated rubber ball valve
Electric on-off valves are usually denoted by the letter code “E”, while pneumatic on-off valves are generally denoted by the letter code “P”. .
I may not have made myself clear; what I’m asking about is the alphabetical code for the designation
Reference can be made to the HG/T 20505 2014 standard. Valve tag numbers fall into two categories: valves in the Basic Process Control System (BPCS) and valves in the Safety Instrumented System (SIS). Isolation valves in basic process control systems are denoted by XV (the letter X is not defined in the HG/T 20505 2014 standard, but it is used in industry practices to indicate emergency isolation); isolation valves in safety instrumented systems are denoted by XZV, where the letter Z serves as a modifier indicating that it refers to a variable within the SIS system. In SV, the S stands for speed and frequency; it refers to a valve that controls speed or rate. As an adjective, S denotes safety, but it cannot appear alone in the first position ； In HZ, H stands for manual (remote) control, while Z serves as a modifier indicating a variable of the safety instrument system; if it is not used as a modifier, it denotes position or an actuator ； In HS, H stands for manual (remote control), while S stands for interlock, indicating that a manual command is sent to an interlock switch ； In MV, the M stands for humidity and moisture content; it refers to the valves used to control humidity and moisture content. In the industry, MV also denotes the output of a controller (the control variable).
Tag number, a tag number refers to a position identifier. Theoretically, it has nothing to do with the electric, pneumatic, or hydraulic operation of the valve.
A tag is not a position number; it is an identifier! !
Thank you! We also decided that XV will be used for pneumatic applications, while MV is specified for electric on/off valves according to the project requirements