Views: 0 Author: J-VALVES Publish Time: 2024-04-23 Origin: Site
II. Key Factors for Selection
(1) Nominal Pressure
The nominal pressure refers to the maximum allowable working pressure of the valve at the standard temperature. When selecting a floating ball valve, it must be ensured that its nominal pressure is higher than the maximum working pressure in the system. For example, if the working pressure of the system is 1.6 MPa, a floating ball valve with a nominal pressure of PN2.5 or higher should be selected.
(2) Nominal Diameter
The nominal diameter refers to the inner diameter of the valve, which determines the flow capacity of the valve. Selecting an appropriate nominal diameter requires calculation based on the flow requirements of the system. If the diameter is too small, it will lead to an increase in fluid resistance and affect the system efficiency; if the diameter is too large, it will increase costs and installation space.
(3) Medium Type
The medium type is an important factor that must be considered during selection. Different media have different requirements for the valve material and sealing performance. For example, for corrosive media (such as acids, alkalis, etc.), materials with strong corrosion resistance (such as stainless steel, alloy steel, etc.) should be selected; for high-temperature media, materials that can withstand high temperatures (such as carbon steel, alloy steel, etc.) should be selected.
(4) Sealing requirements
Sealing requirements depend on the usage scenarios and safety standards of the system. The sealing of floating ball valves is generally classified into soft sealing (such as PTFE) and hard sealing (such as metal sealing). Soft sealing has good sealing performance and is suitable for medium and low pressure working conditions; hard sealing is suitable for working conditions with high temperature, high pressure, or highly corrosive media.
