The shut-off valve body comes in three main structural forms: straight-through, direct-flow, and right-angle. Among these, the straight-through design is the most commonly used. However, it has the highest fluid resistance. In contrast, the direct-flow structure offers lower fluid resistance, making it ideal for fluids containing solid particles or those with high viscosity. The right-angle valve body is typically forged and is best suited for small flow rates and high-pressure applications.
A brief summary of the globe valve:
The main criteria for globe valves include:
1. GB/T 12233-2006 "General Valve - Iron Globe Valves and Lift Check Valves"
2. GB/T 12235-2007 "General Valve - Flanged Steel Shut-off Valves and Lift Check Valves"
3. JB/T 53174-94 "Classification of Quality for Cut-off Valves"
4. JB/T 53165-92 "High Pressure Balanced Globe Valve"
5. GB/T 587-2008 "Marine Flanged Valves for Marine Flanges"
6. GB/T 590-2008 "Marine Flanged Cast Iron Globe Valve"
7. GB/T 8464-2008 "Iron and Copper Threaded Connection Valves"
8. GB 8465.2-87 "Basic Dimensions for Threaded Gate Valves, Globe Valves, Ball Valves, and Check Valves"
The structural form of the globe valve includes straight-through, direct-flow, and right-angle designs. The straight-through type is the most widely used but has the highest fluid resistance. Direct-flow valves are preferred for media with high viscosity or solid content due to their lower resistance. Right-angle valves are generally forged and are suitable for high-pressure, small-bore applications.
When installing and maintaining a shut-off valve, the following points should be taken into consideration:
1. Handwheel and handle-operated shut-off valves can be installed at any position along the pipeline.
2. Handwheels, handles, and actuating mechanisms must not be used for lifting or hanging heavy objects.
3. The flow direction of the medium must align with the arrow marked on the valve body.
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Submission:
This guide provides a comprehensive overview of globe valve structures, standards, and installation considerations, helping users make informed decisions when selecting and using these essential components in various industrial applications.


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