How to choose the correct valve

How to choose the correct valve, in general, China's valve market prices are relatively stable, although a slight increase every year, but the magnitude is very small.

The main problems in the valve market are:

First, some operators purchase valves without factory names, print well-known manufacturers' brand names and certificates, and cause serious damage to the reputation of qualified valve companies.

Second, refurbishment of the valve, some operators re-painted the second time after the waste valve re-painted, giving the project quality a serious security risk. Therefore, care should be taken when selecting the valve that best suits your application.

To avoid ambiguity, precise specifications should be made for each valve. When making an inquiry or ordering, a full and appropriate explanation of the required valve should be made. Select the valve diameter must determine the nominal diameter of the pipe connected to the valve. The valve material determines the correct valve material.

The following factors should be considered:

· The fluid medium to be controlled by the valve · The temperature range of the fluid medium · The pressure range to which the valve is subjected · The climatic conditions that may affect the operation of the valve · Possible abnormal pressures or stresses to which the valve is subjected · Safety standards or piping regulations to be fulfilled br> <br> valve category

What is the control function of the valve? Each valve structure is used to perform a function. Do not expect a valve to perform all functions within the entire piping system.

Pressure-temperature rating. To meet actual needs, pay special attention to the pressure-temperature rating of the desired valve. Pay special attention to the seal material and gasket material, which determine the valve's pressure-temperature rating to a considerable degree. According to the actual needs of the designated sealing materials and precipitation materials to meet or better than the actual needs.

Valves and connections. Pipeline system integrity, future routine maintenance, anti-corrosion factors, on-site assembly, weight and safety, and other factors all determine the factors that should be taken into consideration when connecting valves and pipes.

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 the valve, please provide the following data to avoid unnecessary iterations and delays and to ensure that the valve you purchased is indeed the one you need.

1. Valve diameter 2. Pressure interface material: castings and component materials.

3. Valve types: gate valve, globe valve, check valve, butterfly valve, ball valve, and so on.

4. Terminal connection method. If the connection method is welding, the wall thickness of the connection pipe must be provided; if the connection method is a flange, the flange surface or polishing degree should be provided.

5. Any material that differs from the standard configuration: sealing material, precipitation material, bolt material, etc.

6. Any attachment: acid-proof protective layer, locking device, chain operation, etc.

7. Manual or powered actuator: Please include the required technical details.

8. For the convenience of ordering, please confirm the specification and model.