General waterjet piston seal is usually made of high-performance polymer materials, such as polyurethane or PTFE (polytetrafluoroethylene). These materials were chosen because the products made of these materials are resistant to high temperature and high pressure, and are also resistant to wear.
Waterjet piston seals are usually made of high performance polymer materials such as polyurethane or PTFE (polytetrafluoroethylene). These materials were chosen for their ability to withstand high pressures and temperatures, and for their resistance to wear.

Polyurethane is a common material for waterjet piston seal because of its excellent wear resistance and high pressure performance. It can withstand pressures up to 10,000 psi or more and maintains its sealing properties even under high temperatures and heavy use.

PTFE is another material commonly used for waterjet accessories piston seal. It is a synthetic polymer known for its low coefficient of friction and chemical resistance. PTFE seals maintain their sealing properties even under high temperature and corrosive environments.

The specific material used for a waterjet  piston seal depends on various factors such as the pressure and temperature requirements of the application, the type of fluid being pumped, and the manufacturer’s specifications.