It refers to a type of sealing ring, specifically a V-shaped packing ring, designed for use in the 22mm (or 22 liter) size HTP pump to prevent leaks in reciprocating joints
Features
 :- High Quality Rubber Material.
 - Light Weight.
 - Easy to install.
 
Applications
 :- Used to create a seal between the piston rod and the pump cylinder, preventing fluid leakage and ensuring proper operation