What are the structures and Chinese standards for globe valves?

 The main stop valve product names of China Stop Valve Network include:QJ-5 PneumaticInternal and External Thread Pipeline Globe Valve,QJ-6 Pneumatic Angle External Thread Pipeline Globe Valve,QJ-7 Pneumatic External Thread Pipeline Globe Valve,Self-sealing Straight-through Globe Valve,Square Flange Ammonia Globe Valve

The structural forms of the globe valve body include straight through, straight through, and right angle. The straight through type is the most common structure, but it has the highest fluid resistance. Direct flow fluid has low resistance and is commonly used for fluids containing solid particles or high viscosity. Right angle valve bodies are often forged and suitable for globe valves with smaller diameters and higher pressures. 

The installation and maintenance of globe valves should pay attention to the following matters:

1. The shut-off valve operated by handwheel and handle can be installed at any position in the pipeline. 

2. Handwheels, handles, and dynamic mechanisms are not allowed for lifting purposes. 

3. The flow direction of the medium should be consistent with the arrow direction shown on the valve body. 

The main standards for globe valves are:

1. GB/T 12233-2006 "General purpose valves - Iron globe valves and lift check valves"

2. GB/T 12235-2007 "General purpose valves - Steel globe valves with flange connections and lift check valves"

3. JB/T53174-94 "Quality Grading of Globe Valve Products"

4. JB/T53165-92 "High Pressure Balance Stop Valve"

5. GB/T 587-2008 "Marine Blue Bronze Globe Valves"

6. GB/T 590-2008 "Marine flanged cast iron globe valves"

7. GB/T 8464-2008 "Iron and Copper Threaded Valves"

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