Issue of increasing the weight class of valves

The pound rating of a valve is primarily reflected in its ability to withstand pressure, and this ability depends not only on the material of the valve body but also on the materials and design of internal components such as the valve stem and seat. If the valve body material is WCB, it meets the HG/T20615 flange temperature and pressure standards, which refer primarily to the range of working pressures and temperatures that the valve body can withstand. For the valve core and valve seat, if they are made of stainless steel, their material properties may vary under different operating conditions (such as different temperatures and pressures). Therefore, even if the valve body can meet specific pressure class requirements, if the materials of the valve stem and seat cannot maintain appropriate performance and durability at that pressure class – for example, they may deform or get damaged under high pressures – then it is necessary to consider whether to upgrade to a higher pressure class, or to modify the design of the valve stem and seat to meet the requirements of a higher pressure class. As the pressure rating increases in the range from CL150 to CL300, the design of the internal components of the valve – including the valve stem and seat – is likely to need to be adjusted to ensure that the valve maintains good sealing properties and durability at higher pressures. This may involve considerations such as material selection and structural optimization. In general, yes, as the pound rating of a valve increases, not only the valve body but also the design of the internal valve core and seat may need to be adjusted accordingly to ensure that the entire valve system can handle higher operating pressures. .