The most important part of the pneumatic butterfly valve of ball valve is the ball valve. The proper ball valve of good quality will have a vibration damping effect, and will be flexible and durable, and have a long service life. If the ball valve is not properly installed, the entire pneumatic butterfly valve will be scrapped. What is a good way to purchase ball valves at ordinary times? Now let me tell you.
Firstly, the ball valve shall meet the following conditions: the radius of the ball valve shall be four times greater than the zero point of its height under the rated load; The ball valve shall have a certain additional stroke, at least equal to 50% of the rated static deflection; The number of ball valve coils shall not be too small, generally not less than six; The ball valve manufactured in this way can ensure that the horizontal rigidity of the shock absorber is enough so that the equipment is stable and not prone to toppling, and the elasticity is durable to ensure the lasting shock absorption capacity. However, the price of this ball valve pneumatic butterfly valve is often higher.
Reasonable selection shall be made according to the weight of the equipment. Generally, the compression of the ball valve behind the pressure bearing equipment of the ball valve damper shall be more than 20mm, not more than the rated compression of the pneumatic butterfly valve, so as to ensure that the damper can play a better role in vibration isolation.
What needs to be mentioned is that a ball valve damper is popular in the market at present, which completely hides the ball valve inside the shell, so the state of the ball valve cannot be seen intuitively outside, which is incorrect! Because, after a period of time, if the ball valve is seriously rusted, the manager can not detect and replace it in time, which may lead to the terrible consequences of the ball valve breaking, the water pump sinking, and the pipeline breaking. Although the price of this kind of ball valve damper is slightly lower, it should not be used as far as possible
The pneumatic butterfly valve of ball valve has a low frequency. It is used for high-frequency vibration equipment. The vibration isolation effect is very good, and the structure is compact, but the size and shape are not very large. This makes it more convenient to install and reliable and safe to use. Although the shape is relatively small, the application life is not short. Ball valves and pneumatic butterfly valves have strong adaptability to work. They can work normally even at minus 40 degrees or minus 110 degrees. This is the working state that ordinary pneumatic butterfly valves cannot reach. Whether it is active vibration isolation, passive vibration isolation or shock vibration, it has a very significant effect and can effectively block the sound transmission of solids. It has achieved ideal results in isolation of vibration, reduction of noise, remediation of vibration pollution and environmental protection. Ball valve pneumatic butterfly valve is mainly used for vibration isolation of various high-frequency changing mechanical equipment such as fans, air conditioning boxes, air conditioning units, generator sets, air compressors, water pumps, cooling towers, etc. Appropriate method of ball valve damper selection:
1. The longitude between the operating frequency of the equipment and the natural frequency of the ball valve damper should be greater than 3. In this case, the vibration isolation efficiency should be more than 85%. When the deflection of pneumatic butterfly valve of ball valve of Shanghai Dongfeng Company is 25MM, its natural frequency is 3-4HZ.
2. The surface of shell and ball valve shall be treated by baking paint, galvanizing, zinc and aluminum to avoid corrosion of vibration isolator in a short time, and then affect the service life of vibration isolator. Try not to use products with painted surface treatment.
3. The horizontal rigidity and vertical rigidity of the ball valve shall be greater than or equal to 1, and the ratio between the diameter of the ball valve and the height of the ball valve after the rated negative pressure shall be greater than 0.7. To ensure the invariance of the horizontal tendency of the ball valve damper.
4. Suitable ball valve and pneumatic butterfly valve shall be selected for easy installation.
Ball valve damper is mainly used for vibration isolation of fans, air conditioning boxes, air conditioning units, generator sets, air compressors, water pumps, cooling towers and other high-frequency changing mechanical equipment. The low-frequency composite pneumatic butterfly valve, hanging pneumatic butterfly valve and ball valve pneumatic butterfly valve are very different.