Reversed flow of qi check valve product introduction

When steam turbine start working, the control system of the gases in the air supply device to help close the cylinder of the inferior vena, push to close the cylinder piston moving up and compression spring and spring energy storage, butterfly plate under the impetus of the medium pressure pipeline. When the system fails, medium pressure pipeline is reduced, the butterfly plate under the action of its own gravity, closed, and the gas supply device commutation control system, cause the gas to help put on the cylinder cavity, together with the spring force to push to help close the cylinder piston moves down, help close the cylinder inferior vena gas discharge at the same time, to help the butterfly plate with the fastest speed closed, in order to prevent the steam and condensate piping system flow back, protect the main equipments such as steam turbines. 1, reversed flow of qi and smoke check valve used for steam turbine generator set of extraction steam pipe, according to the working condition of unit and control functional requirements, the control valve actuator requirements should not only have the pneumatic control valve opening function, at the same time in units of electricity load shedding ring heat load, and requires the valve movement function quickly, and can quickly closed ring open valve, the protection unit. 2, according to the requirement, we smoke reversed flow of qi check valve driven by the valve and its control mechanism, USES a pneumatic actuator, built-in power supply, do not need any external gas source, pipeline, can avoid DEH air supply system common pressure air impact each other. 3, extraction non-return valve for pneumatic control form, with arbitrary valve position and the function of the quick action. 4, extraction non-return valve by valve, pneumatic cut-off help closing device, pneumatic control system ( The user should bring along their own) And so much. 5, valves: extraction of check valve check valve selection set by the multifunctional one-piece butterfly check valve, butterfly plate through the valve stem linkage is combined with mechanical conversion mechanism, thus with the organic combination of pneumatic actuators