ZWICK TRI-CHECK SERIES
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.
Another benefit of the valve is the variety of features. Beside the non-return function the valve can be used as a combined check and isolating valve or as a check valve with power assisted closing and opening.
The Series TRI-CHECK uses a seat design which is diagonal to the flange facing in the body. As a consequence the general flow path will be increased, so that the fluidic resistance of the valve will be decreased.
Another advantage is that the valve travel will be reduced, so that the valve reaches its ideal position in the flow much faster. Zwick also uses the latest EFD simulation technology to optimize the design of the series TRI-CHECK and to achieve the best possible hydrodynamical characteristics.
ECONTROL Check Valves
The ECONTROL VR-100 Check Valves are a complete family of backflow preventer valves for a wide range of industrial applications.
In every piping system, there is a need for backflow prevention. Most piping systems utilize pumps or compressors to generate needed pressure for movement of line fluids or gases. When rotating equipment stops, flow reversal or backflow occurs. Check valves (also non-return valves) are used to stop backflow and protect rotating equipment or other mechanical devices from the sudden backflow surges that may occur.
Our check valves are mechanical valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Fluid flow in the desired direction opens the valve, while backflow forces the valve closed. Our range of non-return valves is suitable for oil, gas, water, refining, power and chemical applications where the prevention of flow reversal is mandatory. Check valves can be supplied with a cast or forged body design for high pressure applications or fully lined to meet specific requirements within the chemical industry.
The VR-100 series are available in a number of design sub-families such as swing check valves, tilting check valves, forged steel lift check valves (flanged or flangeless), nozzle check valves…
|Body||ASTM A216, A105, A350, A182, A351, A352, A890, A995, C95300, C95800, A494 CW6MC, MONEL, INCONEL. Please enquiry for different material configurations|
|Trim||ASTM A216, A105, A350, A182, A351, A352, A890, A995, C95300, C95800, A494 CW6MC, MONEL, INCONEL. Please enquiry for different material configurations|
|Seat(s)||PTFE, NYLON, PEEK, NBR, KELF, ENP (Electroless nickel plating), HC (Hard chrome), TC (Tungsted carbide). Please enquiry for different material configurations|
|Sealing||BUNA-N, EPDM, VITON, Flexible graphite, FKM, HNBR, Nitrile, Neoprene. Please enquiry for different material configurations|