Description of the elements to correctly purchase the valve

Generally speaking, the price of China's valve market is relatively stable. Although it is slightly raised and lowered every year, the range is very small. The main problems in the valve market are as follows: 1. Some operators purchase valves without factory names, print famous brands and certificates of well-known manufacturers, and cause serious damage to the reputation of qualified valve companies.

Second, the renovation of the valve, some operators through the re-painting of the old valve after the second sale, bringing serious safety risks to the project quality. Therefore, care should be taken when selecting the valve that best suits your application. In order to avoid ambiguity, precise rules should be made for each valve. A comprehensive and appropriate description of the required valves should be made at the time of enquiry or order. The valve diameter must be selected to determine the nominal diameter of the pipe to which the valve is connected. Valve materials should consider the following factors when deciding on the correct valve material:
· Fluid medium to be controlled by the valve
· Temperature range of the fluid medium
· The pressure range to which the valve is subjected
· climatic conditions that may affect valve operation
· Possible abnormal pressure or stress to be experienced by the valve
· Safety standards or piping procedures to be met
Valve category
What is the control function of the valve? Each valve structure is used to perform a certain function. Don't expect a valve to perform all the functions of the entire piping system.
Pressure-temperature rating. In order to meet the actual needs, please pay special attention to the pressure-temperature rating of the required valve. Pay special attention to the sealing material and the gasket material, which determine the pressure-temperature rating of the valve to a considerable extent. Sealing materials and precipitation materials are specified according to actual needs to meet or exceed actual needs.
Valve and connection method. The integrity of the piping system, future routine maintenance, anti-corrosion factors, on-site assembly, weight and safety are all factors that should be considered in determining the way the valve is connected to the pipe.
Operation mode or operation method Select the appropriate operation mode or operation method according to the valve type, size, pressure, temperature, installation environment and other factors.
Valve order
When ordering valves, please provide the following data to avoid unnecessary repetitions and delays and to ensure that the valve you purchased is indeed the valve you need.
Valve diameter
2. Pressure interface materials: castings and component materials.
3. Valve types: gate valves, globe valves, check valves, butterfly valves, ball valves, etc. 4. Terminal connection method, if the connection method is welding method, also provide the wall thickness of the connecting pipe; if the connection method is flange, provide the flange surface or polishing degree.
5. Any material different from the standard configuration: sealing material, precipitation material, bolt material, etc.
6. Any accessories: acid protection layer, locking device, chain operation, etc.
7. Manual or powered actuator: Please include the required technical details.
8. For ordering convenience, please confirm the specification model.