Paying Attention To Packing Issues Can Help Reduce Leakage Of Ptfe Lined Valves

Paying attention to the packing problem will help Lined Valve reduce leakage.
Packing is used as a sealing material for PTFE lined valves to fill the stuffing box. The function of the packing is to prevent the medium from leaking out of the gap between the valve stem and the stuffing box. The life of the valve also depends to a large extent on the life of the valve sealing surface and the packing system. Therefore, it is necessary to pay attention to the packing problem of PTFE lined valves. The requirements of PTFE lined valves for packing: 1. Corrosion resistance; 2. Good sealing; 3. Small friction coefficient.
Among valve failures, the most common problem is leakage, and packing leakage is the most common and difficult problem to overcome. Possible reasons for packing leakage are: rough packing and high hardness; rough processing of the inner wall of the stuffing box; insufficient valve stem rigidity, causing bending when closed; low valve stem precision; rough valve stem surface; material is not resistant to medium corrosion; packing installation error, etc. These are concentrated on the design and manufacturing quality issues such as packing material selection, selection, processing, and assembly.