Several Connection Methods of Pressure Transmitter Valve
Classification:
Release Time：2017-10-24
There are three kinds of 1. flange connection methods for valve connection. This valve connection method is usually used for pressure and diameter pipeline connection. Its advantage lies in the convenience of assembly and disassembly. Its disadvantage lies in the high price of valves using this connection method, and when it works under the condition of more than 350 ℃, it is easy to cause relaxation of various parts, thus reducing the bolt load capacity, in severe cases, it may even cause leakage. 2. thread connection method The prerequisite for using this connection method is that there must be a through hole on the connected object. When the screw connection is made, it can be inserted directly into the through hole.
Valve connection mode, a total of three
1. flange connection method
This valve connection method is usually used for pressure and diameter pipe connection. Its advantage lies in the convenience of assembly and disassembly. The disadvantage is that the price of the valve using this connection method is higher, and when it is more than 350 ℃ When working under the condition, it is easy to cause the relaxation of various parts, which causes the reduction of bolt load capacity, and even causes leakage when the situation is serious.
2. thread connection method
The prerequisite for using this connection method is that there must be through holes on the connected object. When the screw connection is performed, the bolt can be directly inserted into the through hole and then the other end can be tightened. The connecting pieces commonly used in this connection method mainly include screws, washers, etc., because the size of the connecting pieces adopts standardized design and processing, so it has strong usability in use. The disadvantage of this connection method is that a large leakage channel may be caused, so that the channel must be blocked. If the material used for the valve is weldable, it is best to adopt the method of welding and sealing. Generally speaking, the nominal diameter of the connecting valve under this method cannot be too large, otherwise it will increase the valve connection work.
3. welding connection method
Compared with the flange connection method, this connection method has more reliability and applicability of application conditions, and can be used even in some harsh environments. In summary, it is generally used for high temperature, long-term stable operation conditions, such as nuclear energy engineering and other applications.
The disadvantage of this type of bearing is that it is not easy to disassemble the valve when it fails. At the same time, when the fault is removed and reinstalled, it is necessary to weld again, which greatly increases the installation time and cost. At the same time, there are strict requirements for the technical level of the welding operator, and it is necessary to ensure that the error of the welding seam is controlled within a small range. In addition, for the valve under harsh conditions, the general use of groove to weld.
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