ZWICK Armaturen designs and develops triple eccentric zero-leakage valves. It includes the TRI-CON (butterfly valve), TRI-CHECK (check valve), TRI-BLOCK (Double Block and Bleed butterfly valve) and TRI-SHARK (control valve) series, with a wide range of sizes (up to 72”/DN1800), temperatures and service pressures (up to Class 1500 lbs / PN160).