Rubber pneumatic butterfly valve ----- pneumatic butterfly valve of fan, pneumatic butterfly valve of water pump, pneumatic butterfly valve of air conditioner
In fact, there are two classifications of rubber shock absorber, one is function classification, the other is appearance classification. The rubber shock absorbers are roughly classified as follows according to their functions:
1. Support various installed rubber shock absorbers in a narrow sense;
2. Rubber buffer for shock absorption;
3. Rubber springs used as mechanical actuating parts;
4. Dynamic shock absorber to eliminate vibration of specific vibration frequency;
5. Rubber couplings are also included in the category of rubber shock absorbers.
Rubber shock absorbers are classified as follows according to their narrow appearance:
1. Compression type: this type is a rubber shock absorber mainly used in the compression direction. The advantage is that the load acceptance force is large, but the elastic coefficient in the tightening direction cannot be too low;
2. Shear type: this type is a rubber shock absorber mainly used in the shear direction. Its load bearing force is small, but it has the advantage that the elastic coefficient can be selected very small;
3. Composite type: it is a rubber shock absorber used in the combined direction of compression and shear, with the middle characteristics of compression and shear;
4. Cylindrical type: This type of rubber damper can be used for vibration reduction in vertical, axial, twisting, prying and other directions. It is similar to the compact rubber alkali vibrator in the vertical direction of the shaft. Its load acceptance force is generally large, but the elastic coefficient cannot be too small.

(4) The electromagnetic flowmeter has no mechanical inertia and flexible response. It can measure the instantaneous pulsating flow, as well as the flow in both positive and negative directions.