The valve stem is not only a moving part and a force bearing part, but also a sealing part during valve opening and closing. Therefore, it will be subject to the impact and corrosion of the medium, as well as the friction with the filler. So when selecting valve stem materials, we must ensure that they have sufficient strength, good impact toughness, scratch resistance, and corrosion resistance at the specified temperature. The valve stem is a material that is prone to damage, so when choosing a material, it is necessary to pay attention to its heat treatment performance and processing performance.

Valve stem types include: globe valve stem, gate valve stem series, ball valve stem, butterfly valve stem, forged steel stem, soft sealing stem, stainless steel stem manufacturing series, large stem and special stem, etc.

The valve stem nut and valve stem are equipped with threads to directly withstand the axial force of the valve stem and the friction force between the plate and bracket and other valve components. Therefore, in addition to having a certain degree of strength, valve stem nuts also require low friction coefficient, corrosion free, and non jamming characteristics.