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Let us learn some knowledge about distributing valve and pump structure of concrete pump from Daswell:Henan Daswell Machinery is a professional manufacturer of mining machine for almost 30 years in China. We are dedicated to supplying our customers with best service and products, our major products include:Foam concrete mixer,Sicoma planetary concrete mixer,hot sale SICOMA Twin Shaft Concrete Mixer,If you are interested in our products, please contact us freely: sales@daswell.com   The two pistons of pumping mechanism make counter motion synchronically and the distribution valve and piston do the coordinated actions. With the switching function between high pressure and low pressure, the concrete pump can realize high and low pressure pumping transformation. The pistons of concrete cylinder should be convenient and safe to replace. The reversing of distribution valve should be flexible concrete batching plant manufacturers concrete mixer, rapid and accurate and the reserving time should not exceed 0.3s.   The operation of control device for reversing should be flexible and accurate. The lubrication and sealing of the reversing mechanism of distribution valve and mixing bearing should be reliable. It should be easy to eliminate the materials when the mixing device is stuck by materials. The ratio of the rotation rate between full load and no load should not be smaller than 80%. When cleaning the concrete pump, it is necessary to keep enough water to ensure the cleaning and cooling of every stroke. The bottom of washing chamber must be reliable sealing and equipped with drainage system. The sealing of the hopper opening should be reliable and there must be no mortar leakage when working. The sealing element must not fall off when it is in transport and at work.