How did the pneumatic symbol of double acting pneumatic butterfly valve come from- Shanghai Dongfeng Pump Valve Factory - 上海花千坊_上海龙凤花坛_夜上海最新论坛

How did the pneumatic symbol of double acting pneumatic butterfly valve come from?

How did the pneumatic symbol of double acting pneumatic butterfly valve come from?

Shock absorber in shock absorber classification
It is said that shock absorbers are generally classified into shock absorbers and ball valve shock absorbers. In fact, this is not the case. It is just like a beginner's explanation. In fact, there are many middle division methods for the classification of shock absorbers, one of which is based on whether the part where the shock absorber is located can rotate. In this way, shock absorbers can be divided into fixed shock absorbers and rotary shock absorbers.
1. Fixed vibration damping refers to taking vibration damping measures for fixed parts, such as base shock absorber;
2. Rotating vibration damping refers to taking vibration damping measures on rotating bodies, such as rotor vibration damper, bearing vibration damper, etc.
Their applications are:
1. Fixed vibration damping mainly refers to base vibration damping, which is widely used;
2. The shock absorber, ball valve shock absorber, fluid shock absorber, etc. can be used for base vibration reduction. Different shock absorbers are used according to different conditions. Generally, shock absorbers are used more. It is an ideal damping data, which has damping effect on vibration. It has great linear toughness, can be stretched to break without losing its elasticity, and can accept alternating stress without fatigue. Like water, it can hardly be compressed. After being pressed, it will only produce elastic deformation, but its volume will not change.
When the temperature is lower than a certain degree, the elasticity of the shock absorber will be significantly reduced, so the shock absorber should not work in severe cold conditions; At the same time, it is not resistant to high temperature, and its working temperature should not exceed 250 ℃. The compressive strength of is much greater than the tensile strength. The stretching length of is usually several times larger than the tightening interval. When being stretched or compressed, their natural vibration frequencies are not the same. According to the complexity of its structure, shock absorbers can be divided into two types: cumbersome shock absorbers and combined shock absorbers.
1. The complicated shock absorber has a single structural cylinder, and usually only needs one piece of damping data. It is mainly used in places with light load and less intense vibration;
2. The combined shock absorber is composed of several shock absorbers, and is usually used in places with heavy load and great vibration or severe requirements.

 Pneumatic butterfly valve

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