Songxia pneumatic butterfly valve - spring damping pneumatic butterfly valve - hanging rubber pneumatic butterfly valve manufacturer
The spring pneumatic butterfly valve industry has existed abroad for more than 100 years, while the domestic pneumatic butterfly valve industry is still in its infancy, lacking standards and specifications. After the market demand has emerged in recent years, a large number of pneumatic butterfly valve manufacturers have participated, with mixed production and quality, and many fake and inferior products filling the market. Customers who do not understand pneumatic butterfly valves are likely to be tempted to buy low-quality products at low prices. What are the characteristics of high-quality spring pneumatic butterfly valve products?
1、 The structural design is reasonable. At present, the mainstream spring pneumatic butterfly valve products in the international market are: free spring pneumatic butterfly valve, limit spring pneumatic butterfly valve, and side limit type. No matter what kind of structure, it is necessary to prevent rigid connection between structures to transmit vibration, and it is better to have a height adjustment design.
2、 The surface rust prevention treatment shall be in place to ensure the service life of spring pneumatic butterfly valve. At present, the surface treatment of mainstream pneumatic butterfly valves includes hot-dip galvanizing, paint baking, spray painting, plastic spraying, etc. Zinc pad and baking varnish are preferred.
3、 The rubber parts have outstanding performance. Many spring pneumatic butterfly valves are equipped with rubber anti vibration elements. High quality spring pneumatic butterfly valves have special attention to rubber anti vibration elements at different parts. The bottom cushion is generally of anti-skid design, with soft and hard combination and long service life; The rubber with side limit is generally soft and wear-resistant; 4、 The state of the spring can be observed. In order to know when to change. After installation, pneumatic butterfly valve or pneumatic butterfly valve accessories can be changed without requiring shutdown.
5、 The spring is elastic and durable. Under the premise of rated load, it usually has more than 50% of the reserved travel. Only in this way can the spring life be guaranteed. In addition, the number of coils of the spring shall not be less than 6, and the outer diameter of the spring shall not be less than 80% of the compacted height of the spring. Only in this way can the lateral stability of the spring be ensured.
6、 Compact and reasonable structure.

What are the main functions of pneumatic butterfly valve?
1. Device stress of pipeline
In a complex pipeline system, there are often difficulties in the work of the device due to the constraints of space and location: formed pipes cannot be installed; Some cold corrections will inevitably occur when the pipes are bent, straightened and fitted. According to the pipe diameter and the detailed situation on site, the cold correction amount ranges from several millimeters to tens of millimeters, some hundreds of millimeters. Theoretically, the greater the amount, the higher the internal stress. These residual device stresses in the pipeline system are undoubtedly extremely hidden.
A section of bearing smooth oil duct in a certain type of starter has broken repeatedly in practice, which is caused by high stress of the device.
Since it can bend at will and the internal stress generated by bending under the condition of rated bending radius is very small, it can bring great convenience to the operation of the device and also play a certain role in ensuring the safe operation of the pipeline system. This is the main reason why some pipeline systems must use pneumatic butterfly valves.
2. Location of compensation pipeline
Due to the need of loading and unloading the mold, the movable cylinder on the curing press will move upward and downward. After repeated reciprocating movements, the copper serpentine tube will become tired and broken. Although it can continue to be used after repair, stopping for repair will cause time loss. Although the rubber tube has good flexibility and strong fatigue resistance, it is also a thin link in terms of pressure bearing, temperature resistance, aging resistance, etc. It cannot continue after several months of ordinary use. The good comprehensive performance of pneumatic butterfly valve is fully demonstrated here. In the general industrial category, in addition to pressure and temperature, there are often some harsh conditions such as fatigue, corrosion, vibration, pressing, impact, etc. Under such conditions, it is most appropriate to compensate for the displacement of the pipeline.
3. Absorb vibration
The air conditioning in the hall of a giant building is provided by the 6FWB unit fixed in the public room. The vibration of the unit passes through the bridge connecting the pipeline and is continuously transmitted to the air hall, with a noise value of 45dB. In such an environment, people always feel uncomfortable. After the improved design, the pneumatic butterfly valves are connected in series on the connecting pipes, which not only absorb the noise generated by the unit vibration locally, but also the noise generated by the fluid pulsation in the pipeline system. At this time, the noise value in the air hall is only 33dB, greatly improving the environment in the hall.
It can absorb vibration, which can not only improve the ability of fatigue and destruction of the system, but also reduce noise. This is the reason why some pipeline systems are used. It can also be noted that braided hoses can be used in the fire equipment industry.