Before selecting pneumatic butterfly valve with fan spring, it is necessary to calculate its damping force
The fan spring pneumatic butterfly valve is one of the products of the pneumatic butterfly valve, which can achieve good shock absorption effect, and the ordinary shock absorption efficiency can reach more than 96%. The type of fan spring pneumatic butterfly valve can be divided into: height adjustable spring pneumatic butterfly valve, that is, the adjustment structure with high equipment height for spring damping. As for the fan whose center of gravity is not at the center and the air is uneven, we can adjust the height of the spring pneumatic butterfly valve to improve the equipment level.
The shock absorption pedestal, also known as the shock absorption pedestal, inertia fast and shock absorption support, exists to reduce the center of gravity of the equipment and increase the stability of the equipment. At present, the equipment with the most shock absorption pedestals on the market is the water pump. The low-frequency vibration of the water pump itself can cause certain harm to people. The building standards also understand the rules. The water pump needs to install a shock absorption pedestal. The operation of the fan will also produce vibration, but few people choose to install shock absorption pedestal when installing the fan.
Do you need a shock absorption pedestal for the bottom fan? Why? This problem should be understood from the concept of shock absorption pedestal. The shock absorption pedestal and shock absorption pedestal we usually refer to concrete pedestal, which is made of national standard channel steel as a frame, with two layers of steel bars laid inside, and C30 concrete poured. The whole waste product acts as a counterweight to reduce the center of gravity of the equipment, and then is equipped with spring shock absorber or rubber shock absorber.
Such equipment has a good damping effect on low-frequency vibration, and the general damping efficiency can reach more than 96%. Can this shock absorption pedestal be suitable for fans? The answer is yes. From the technical point of view, there is certainly no problem. If from the economic point of view, this kind of plan is not very economical, and can be handled in a different way. Another kind of shock absorption pedestal, also called shock absorption bracket, is a special frame pedestal designed according to the characteristics of the fan.
The application of fan damper is within the range of preloading load P1 to the maximum allowable load, and the damping D=0.065; How to select fan spring isolator?
1. Selection of load range of fan spring isolator Operating weight of equipment M * 130%/
Number of pneumatic butterfly valve devices N=load range of fan spring isolator; For example, the operating weight of the fan is 1 ton; Four fan spring isolators are required for single fan; What is the load of single fan spring isolator?
According to the formula: 1000 kg * 130%/4=325 kg
Check the fan spring isolator specifications of the fan spring isolator manufacturer to find the fan spring isolator specifications suitable for this fan.
2. How to determine the number of fan spring isolators of equipment: detailed method If the equipment manufacturer provides this data, the manufacturer's rules shall be followed; Under normal conditions, the distance between pneumatic butterfly valve devices shall not exceed 2M, so the number of fan spring isolator devices can be calculated; If the equipment has channel steel base and the base strength is strong enough, the fan spring partition can be properly added
The number of pneumatic butterfly valves shall be properly reduced due to the installation distance of the vibrator.
3. Selection of fan spring isolator type:
In most cases, the functions and functions of fan spring isolators are the same. The difference between different types of pneumatic butterfly valves lies in their different shapes. Fan spring isolators can be divided into vertical fan spring isolators, anti-seismic pneumatic butterfly valves, restricted fan spring isolators, blocked fan spring isolators, and suspended fan spring isolators.
To sum up, if you want to purchase a suitable and high-quality fan spring isolator, you need to calculate its damping power first. You can never buy it by experience alone, so as to avoid causing resonance and causing large losses. In addition, the fan spring isolator has strict requirements on the operating environment. The operating temperature is - 40 ℃~100 ℃, and its operating environment is not suitable for places with corrosive media, otherwise its operating performance will be seriously affected.

(3) The pressure and differential pressure shall be controlled within the allowable range. Especially the fluorine plastic lined regulating valve and stop valve sealed by bellows. The corrugated pipe is made of tetrafluoro material, with high pressure and high differential pressure, which is easy to cause the rupture of the corrugated pipe. The fluorine lined regulating valve with bellows seal can be replaced with tetrafluoro packing seal if the pressure and differential pressure are high under service conditions.