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         Name:   QBK Air operated diaphragm pump  Type:   QBK2S-25
        QBK is coosai’s new developed series of AODD pump which is also the third generation, it has the virtue of long
        service life and nonstop operation, not only it can convey some uneasy flowed medium, with the merits the merits of
        self-pumping pump, diving pump, shield pump, slurry pump and impurity pump etc.
        1. It’s unnecessary to pour the drawing water, the suction lift reaches 5 m height, the delivery lift reaches 70 m
        length and the export pressure≥6bar.
        2. Wide flow and good performance. The diameter allowed to pass the max grain reaches 10mm. The damage is
        very less to the pump while exhausting the slurry and impurity.
        3. The delivery lift and flow can pass the pneumatic valve open to realize the step less adjustment(the pneumatic
        pressure adjustment is between 1-7bar).
        4. This pump has no rotary parts and no bearing seals. The diaphragm will completely separate the exhausted
        medium and pump running parts, working medium. The conveyed medium can’t be leaked outside. Thus it will not
        cause the environmental pollution and human body safety dangerous while exhausting the toxin and flammable or
        corrosive medium.
        5. No electricity. It’s safe and reliable while using in the flammable and explore places.
        6. It can be soaked in medium.
        7. It’s convenient to use and reliable to work. Only open or close the gas valve body while starting or stopping.
        Even if no medium operation or pausing suddenly for long time because of accident matters, the pump will not be
        damaged caused by this. Once over-loading, the pump will automatically stop and possesses the self protection function.
        When the load recovers normally, it also can start automatically.
        8. Simple structure and less wearing parts. This pump is simple in structure, installation and maintenance. The
        medium conveyed by the pump will not touch the matched pneumatic valve and coupling lever etc . Not like other kinds
        pumps, the performance will drop down gradually because of the damages of rotor, gear and vane etc .
        9. It can transmit the adhesive liquid (the viscosity is below 10000 centipoises).
        10. This pump needn’t the oil lubricant. Even if idling, it has any influence to the pump. This is a characteristic of
        this pump.


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