Regarding valve selection
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The valve specification sheet issued by the design institute does not outline the structure of the valve core. When ordering a valve, is it the valve manufacturer who designs and determines what type of valve core will be used?
The specification sheet indicates that the valve core type is a SINGLE Port single-seat valve; this should be considered in conjunction with the technical agreement with the purchaser.
Isn’t it specified that it’s a Globe stop valve?
The structure of the valve core should be determined based on process parameters as well as the characteristics of the valves produced by the manufacturer; once the main type is chosen, it is a GLOBE valve with a single seat. Whether it is a balanced spool or an unbalanced one, or a sleeve type, or low-noise design, etc., these are primarily determined based on parameters such as the process medium, pressure, temperature, and flow rate.
Globe single Port EQ%, and the selection is based on the technical specifications or a pressure of 600LB.
It is generally determined by the medium and strength; if the requirements are not high or there are no special demands, it is usually not necessary to specify it
Your specification sheet states a single-seat GLOBE valve :)
Leave it to the valve manufacturers; they know how to do it. Especially manufacturers that produce ANSI valves are extremely familiar with them. Design institutes may not be good at selecting and designing for newcomers.
Learn some professional English: a single-seat control valve is called a GLOBE VALVE, while a ball valve is called a BALL VALVE.
The data table specifies the valve body type as Globe Type (plunger valve), the flow characteristic as EQ% (equal percentage), and the valve internal component type as Single port (single seat)； Actually, there is a misunderstanding here. Single port remains the valve body type. It is noted that item 37 specifies the material, while item 38 does not. Therefore, it is inferred that the designer provided a Globe-type valve core. As for whether it is suitable, it depends on the process parameters. It is noted that the valve’s pressure rating is Class 600LB with PTFE packing, the valve diameter is 8”, and its Cv value is 249 (I recall that the Cv value for 8” valves is around 400; this one seems to be a 6” valve), so the pressure difference should be fairly high, leading to cavitation. If the medium is clean, balance valve internals should be chosen. Additionally: regarding the type of valve internals. Globe Type - Single port ； Globe Type - Double port ； Top Entry – Trunnion is the complete expression; the type of valve internal component should be ； Globe, Globe with Guide, Cage - Balanced, Cage - Balanced with Anti-Cav