ZWICK manufactures valves that meet the highest requirements. The range of services includes metallic sealing butterfly valves of the series TRI-CON, TRI-CHECK Series Check Valves, Double Block and Bleed versions of the TRI-BLOCK series and the control fitting with the specially designed Sharktooth attachment TRI-SHARK.
The number of unique technical attributes of the product, as the cone-in-cone seating design with the multiple laminations and the metal seat makes the series TRI-CON to an allrounder for many different industrial applications. Zwick valves are used for industrial and exhaust gases, liquids, hot water or steam at lowest as well at high temperature zones up to 815°C. The TRI-CON is utilised extensively in the chemical, petro-chemical, oil & gas, offshore and district heating markets.
The check valve TRI-CHECK combines all the benefits of the Series TRI-CON in a non-return valve. Triple-offset design with a wide seat angle and a true cone in cone, no rubbing while moving and absolute zero leakage performance. Also the statically held gasket and the no pinned disc design are used in the Series TRI-CHECK. The TRI-CHECK is equipped with a hydraulic damper and a counter weight. The damper can be adjusted to the actual installation conditions in which the valve will be used.
The Double Block and Bleed design features every technical advantage which the series TRI-CON has plus there is a true double block and bleed feature which delivers zero leakage. By using this design, the former two valve system with a spool piece becomes obsolete. This fact is not only important for installation since you have to install only one valve body in the pipeline, but also only one actuator or gearbox is required. With ZWICKs unique design of the linkage between the two shafts, the user is able to actuate both shafts with only one actuator and reach zero leakage with the two available sealing surfaces.
TRI-SHARK control valves are able to achieve a equal percentage inherent characteristic which greatly extends the control rangeability. Furthermore they offer great advantages in the field of cavitation reduction and noise attenuation, as well as in dynamic torque reduction. They are suitable for a wide range of services, from cryogenic temperatures till -196°C up to +815°C, including liquids, gases and steam.