Operation essentials of concrete jam prevention

   1.Concrete isolation is the main reason of concrete jam.Concrete isolation is mainly because wrong operation．

   2.Concrete jam always happens at the 90°bend pipe between the middle arm and the small arm．

   3. Essential operation of concrete jam prevention

  ①The process of pumping water and sand slurry before pumping concrete must be continuous．If it stops during working，the water refluence may isolate the sand slurry．

  ②The concrete quality must be up to desire.Containing too much or too little water will result in concrete jam．

  ③Pipe cleaning must strictly follow the operation rules．Clean ball and concrete bag is easily broken by wrong operation，which will result in concrete isolation and jam．

  ④Pipes cleaning must reach every inch，No sand is permitted leave in the pipes，or else concrete jam may happen in next time．

  ⑤It cannot wait more than 40 minutes for concrete  during pumping(If no concrete isolation prevention device installed)，otherwise，the concrete is isolated and jam at the bend．

The above Attention for using the concrete placing boom, hope it is helpful for your operation. Tomorrow we will mention the Abrasion of pipeline of the concrete placing boom.