Differences between high-performance butterfly valves and conventional butterfly valves
The high-performance butterfly valve adopts a unique three eccentric structure, with zero friction achieved by the sword of the valve plate and sealing ring, and line surface contact during the middle action process, making it a typical double seat structure. The high-performance butterfly valve plate and sealing ring adopt a unique eccentric structure, which has the characteristics of compact structure, good cutting performance, long service life, and both adjustment and cutting functions. Widely used in industrial departments such as metallurgy, chemical engineering, electricity, light textile, food, medicine, paper making, as well as municipal engineering, water plants, and other pipelines to cut off or control pressure and flow of tap water, sewage, oil liquids, air, gas, natural gas, water vapor, and other media.
The difference between pneumatic high-performance butterfly valves and conventional butterfly valves is that the opening torque of conventional butterfly valves is large, and there is a "tearing" phenomenon between the valve plate and sealing ring (such as rubber) during the opening and closing process, resulting in a larger operating torque, shorter service life, and lower sealing reliability of conventional butterfly valves. The 710E high-performance butterfly valve is a type of automatic control valve that has been developed to meet the needs of the rapid development of the automation industry, with high lifespan, high reliability, applicability to high temperatures (hard sealing), high pressure, high frequency of use, and the ability to adjust and cut off. In recent years, it has become increasingly popular.
Characteristics of pneumatic high-performance butterfly valves:
1. High performance adjustable cut-off type. It can be used as both a regulating valve and a shut-off valve.
2. Bidirectional sealing type, different from general unidirectional sealing, can still reliably seal even in the event of medium backflow or "air hammer" phenomenon.
3. The valve body adopts integral casting technology, with a compact structure, small volume, and light weight;
4. Adopting a dual eccentric structure, when closed, the valve plate expands outward to achieve a peripheral sealing state; When opened, the valve plate quickly detaches from the sealing ring, effectively preventing wear of the sealing ring; This not only reduces the operating torque, but also increases the working life of the valve.
5. The sealing ring design is novel and adopts internationally advanced technology: the PTFE seal adopts a "lip tooth" shaped self sealing structure; The hard seal adopts a "U" shaped elastic seal. The sealing structure has a long and reliable service life. As for when to use soft sealing and when to use hard sealing, it mainly depends on the user's requirements, operating conditions, and corrosion resistance requirements.
6. This valve has a large flow capacity and small flow resistance, second only to the same caliber non shrink capacity O-ring ball valve.
7. The valve has a large flow diameter and a channel diameter greater than the channel diameter specified in GB12238. The flow channel has basically no shrinkage cavity, making it easy for pipeline cleaning and self cleaning. It is more effective for fluid with turbid, low viscosity and suspended particles and fiber media.
8. The connection method with the pipeline adopts the non flange clamp type. Structure length: The soft seal adopts GB12221 medium series (ISO5752 medium series code: 20), and the hard seal adopts GB12221 long series (ISO5752 medium series code: 16). Therefore, this type of valve has strong universality and interchangeability, and is in line with international standards.
9. Four major types of standard actuators: pneumatic piston type (ZS), pneumatic diaphragm type (ZM), and electric
