2.1 Implementation standard: GB/T 25234-2010 The latest standard of grain and oil machinery impeller air closure.
2.2 Structural features: The inlet and outlet of the rotary valve are standardized round mouth flanges, and the bearing is external to avoid Due to pressure axial channeling powder damage bearing, improve the service life of equipment. Rotary valve has a single machine, shaft line and back plate machine Various forms, according to different positions or requirements to choose different structural forms, convenient for customers according to the actual process position Install or require installation.
2.2.1 Shaft connection: SAF reducer center and rotor center collinear, reducer shaft and rotor directly connected, transmission efficiency High rate, low failure rate, but the speed can not be adjusted after the selection of reducer (except frequency conversion speed regulation);
2.2.2 Back plate machine: the center of R reducer is parallel to the center of rotor, and the sprocket chain group is used for power transmission The structure is equipped with chain tensioning device, which can effectively prevent overload and protect the rotor shaft and reducer. This structure shape
Type transmission efficiency is slightly lower than direct link, but through different sprocket combinations can easily adjust the rotor speed.
2.3 Material characteristics: Rotary valve is divided into nodular cast iron (DN150 ~ 400), carbon steel (DN450 ~ 500) and stainless steel (full series) a variety of materials, easy to choose according to the actual needs of customers; The casting of rotary valve adopts natural aging Combined with artificial aging treatment, effectively remove the internal residual stress, not easy to deformation.
2.4 Sealing characteristics: DN series impeller rotary valves are divided into packing seal, Gray seal and gas seal, which are Modular structure design, according to the process conditions, material state, material or ambient temperature, etc.
Post time: Dec-13-2022