Piston Seat Valveenlarge
A metal piston or disk with annular seat seal is the sealing element. Within the piston is guided through special piston guide bands and grooved rings in the valve bonnet . This is a robust valve type which is suitable for high pressures and for many fields of application thanks to the use of different sealing materials. Because of the special piston design these valves are in most cases more suitable for high pressures than diaphragm valves.