In terms of material, it can be divided into: carbon steel ball valve, stainless steel 304 ball valve, 316 ball valve and copper ball valve

Stainless steel pneumatic butterfly valve
4 Finish Bi Yu
(1) When designing the pneumatic butterfly valve of a certain type of starter, we inherited the mature technology of the pneumatic butterfly valve in service from the aspects of structure and process, so as to reduce the development risk.
(2) The length and static bending radius of the pneumatic butterfly valve meet the device and fixation requirements on the initiator; The minimum radius of curvature during operation corresponds to the request for dynamic bending radius.
(3) The pneumatic butterfly valve can meet the displacement compensation request of the initiator.
Structure, type selection and device precautions of corrugated pneumatic butterfly valve
1、 Structure of corrugated pneumatic butterfly valve
The corrugated pneumatic butterfly valve has many characteristics, such as good flexibility, high temperature resistance, corrosion resistance, high pressure resistance, fatigue resistance, etc. Compared with plastic hose, it is safer and has a longer life. As a high-quality flexible pipeline, it is widely used in modern industrial pipelines, mainly in aerospace, electric power transportation, construction steel, petrochemical and other fields.
The corrugated pneumatic butterfly valve is mainly composed of corrugated pipe, mesh sleeve and joint, as shown in the figure.
Diagram of corrugated pneumatic butterfly valve
2、 Selection of corrugated pneumatic butterfly valve
The following factors should be considered comprehensively: medium property, diameter and pressure, joint mode, displacement mode, minimum bending radius and length, etc. Improper selection may lead to early failure of pneumatic butterfly valve and serious personal or equipment accidents.
1. Type
In order to compensate for pipe displacement, device deflection and foundation settlement, absorb vibration and reduce noise, it is advisable to select annular bellows pneumatic butterfly valve; For places with high pressure but infrequent displacement and vibration, spiral bellows pneumatic butterfly valve should be selected.
2. Medium property - material
Select the pneumatic butterfly valve with appropriate material according to the corrosiveness and temperature of the medium 3. Temperature correction coefficient
The temperature correction coefficient of common data of bellows, mesh sleeves and joints is shown in the following table:
The hose correction coefficient shall be determined according to the temperature correction coefficient of corrugated pipe, mesh sleeve and joint, and then the minimum value shall be taken.
4. Connection mode:
P Spherical type, conical type, flat union type, quick coupling type, pipe thread type, flange type and receiver type 5. Length of pneumatic butterfly valve:
5.1 Length of pneumatic butterfly valve for vibration reduction and noise reduction
5.2 Length of pneumatic butterfly valve for angular displacement
5. Length of pneumatic butterfly valve during 180 ° bending and axial movement
5.4 Length of pneumatic butterfly valve during 180 ° bending and radial movement
6.3 Length of pneumatic butterfly valve for radial displacement
Substituting the data of light oil tank into the calculation, we can get: L=736mm, 800mmSH3412-1999T is optional