bypass relief valve
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Bypass Valve
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PRDS used in turbine bypass applications help to protect the turbine during start-up, power trip and also for part load generation. Turbine by pass valve prevent venting of steam into atmosphere and allow the steam to be dumped into condenser, so that energy can be saved to generate high temperature Boiler Feed Water.All process plants like Fertilizers, Petrochemical, Refineries, Pharmaceuticals, Sugar Pulp & Paper, Steel, etc.
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Automatic Bypass Valves
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This two valve system has been designed to prevent risks in case of failure of high pressure preheaters. It consists of one 3 way valve and one 2 way valve having both an internal piston connected to the stem and sliding into a cylindrical chamber. In case of heater tube bundle failure, a level switch sensing the water level in the preheater shell will open the exhaust valves generating differential pressure between the two parts of the cylindrical chamber. This pressure difference actuates the stem movement, operating the valves and deviating the flow, therefore bypassing the preheater. Operating speed can be controlled by an external regulating valve. All this system does not need any external power (i.e. Electrical or pnaumatical) so giving best protection in case of accident. We produce this system according to rating asme 900, 1500, 2500 and special classes in size up to dn 18".