【Popular science stickers】Structural classification and product types of globe valves

The cut-off valve, also called the cut-off valve, is the most widely used valve, which is mainly composed of a valve body, a valve clack, a valve cover, and a valve stem. The valve body and valve cover are pressure-bearing parts, and the valve clack and valve stem are internal parts. The shut-off valve is a valve in which the closing part (disc) moves along the center line of the valve seat. According to this movement form of the valve disc, the change of the valve seat port is proportional to the valve disc stroke.

Globe valve structure classification

According to the structure of the valve body, the globe valve is divided into right-angle type, straight-through type and direct-flow type.  

1. The right-angle fluid only needs to change its direction once, so that the pressure drop through this valve is smaller than that of a conventional shut-off valve. The valve body is mostly forged, which is suitable for shut-off valves with smaller passages and higher pressures.  

2. Straight-through is the most common structure. The medium inlet and outlet channels are 180° in the same direction, but the fluid resistance is the largest.

3. In the direct flow or Y-shaped stop valve, the flow channel of the valve body and the main flow channel are in an oblique line, the fluid resistance is small, and it is mostly used for fluids containing solid particles or high viscosity.

Globe valve product category

According to nominal pressure: vacuum, low pressure, medium pressure, high pressure, ultra high pressure valve, etc.;

According to working temperature: high temperature, medium temperature, normal temperature, low temperature, ultra-low temperature valve, etc.;

According to the driving mode: manual valve, power driven valve (electromagnetic, pneumatic, hydraulic, electric and various linkage valves), automatic valve, etc.;

According to the valve body material: cast iron, cast copper, cast steel, carbon steel, titanium, stainless steel valves, etc.;

By application sector: general purpose valves, power station valves, marine valves, metallurgical valves, pipeline valves, plumbing valves, etc.;

According to the structure: straight-through type, angle type, direct current type, etc.;

According to the connection form: internal thread, external thread, flange, welding, clamp, clamp, ferrule, etc.;

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