Non-Return Valves WITT non-return valves protect plants, pipelines and outlet points against reverse gas flow and meet all relevant standards and regulations. The product range of non-return valves includes a large choice of nominal sizes (up to DN200) and flow rates (0.35 – 106 SCFH). The sophisticated valve technology of WITT non-return valves provides small pressure drops making them also suitable for applications with smallest opening pressures. A high-quality sealing system with elastomeres prevents leakages, and dirt filters at the inlet point assure long service life of the non-return valves. Some non-return valve models can also be used as flashback arrestors. All non-return valves can be mounted in any orientation, are available with all connections, in brass and stainless steel and are suitable for almost all technical gases.
Germany
Retaining valve with embossed directional arrow or printed in black. With conical nozzles. Various uses.
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The valve closes totally the pipe line when back flow occurs. The valve is complete with an hydraulic control circuit able to regulate operation’s speed during closing, preventing surge.
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Piston valves for petrol or oil lines. The valves prevent the line from draining after the pump has been switched off. This type of valve is only used in applications above 5 bar. The opening pressure is set to the corresponding counter pressure.
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Non-return valves for in-line installation, series VR, made of nickel-plated brass. With threaded connection and/or hose plug-in connection.
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