Advantages, disadvantages and application advantages of pneumatic stop valve
1、 Advantages
Pneumatic stop valve
Pneumatic stop valve
1. Simple structure, convenient manufacturing and maintenance.
2. Small working stroke and short switching time.
3. Good sealing performance, small friction between sealing surfaces, and long service life.
4. The structure of the valve body of the pneumatic stop valve is straight through DC type and right angle type. Straight through type is a common structure, but its fluid resistance is large. DC fluid has low resistance, and is mostly used for fluids containing solid particles or with high viscosity. The right angle valve body is usually forged, which is suitable for small diameter and high pressure stop valves.
5. In the process of opening and closing, the friction of the sealing surface is smaller than that of the gate valve, and it is wear-resistant.
6. Generally, there is only one sealing surface, with good manufacturing process and easy maintenance.
2、 Disadvantages
1. The fluid resistance is large, and the capacity required for switching is large.
2. It is not suitable for medium with particles, high viscosity and easy coking.
3. Poor regulation performance.
4. The pneumatic stop valve adopts the bellows seal design, which completely eliminates the shortcomings of quick aging and leakage of the ordinary valve stem packing seal. It not only improves the energy efficiency, improves the safety of production equipment, reduces the maintenance cost and frequent maintenance, but also provides a clean and safe working environment.
Advantages
1. Double seal design (bellows)+packing) If the bellows fails, the valve stem packing will also be avoided;
2. External leakage, meeting international sealing standards;
3. Reduce energy loss, improve plant equipment safety, and avoid fluid loss;
4. Long service life, reduce maintenance times, and reduce operating costs;
5. The bellows seal design is firm and durable, ensuring zero leakage of the valve stem and providing conditions without maintenance.
