PP type pneumatic buffer seal is a seal specially designed for cylinder piston buffer. • The seal acts as a one-way valve in the entire sealing system, eliminating the need to add other check valves to the system. •Because of the automatic centering function, even if the buffer spear and the cylinder are eccentric, it still has a good buffer effect. • Automatically optimize the selection of buffer stroke. •Strong sealing profile design makes it suitable for harsh working conditions. • Thanks to its own pressure relief exhaust channel, the system can react quickly to change directions. Very good abrasion resistance. • Easier to install. • Excellent resistance to media when appropriate material is selected. • Installed in closed trenches.