With unceasing perfection and innovation, the airtightness and expedite circulation of selector valve have been improved and its structure becomes more and more simple and perfect.Pumping becomes more steady, reliable, and easy-control after replacing mechanical drive with hydraulic drive. Being improved from traditional relay control to PLC control, electric control system is more reliable and easy-control too.Superplasticizer, which can improve pumping effect of concrete without reducing concrete performances, is applied to raise mobility and pump ability of concrete.

When pipeline is obstructed, the main hydraulic transmission system can conduct overload protection automatically, and control the reversing of selector valve to realize wheel cylinder of the machine to eliminate the blocking. The mixing system can also realize anticlockwise rotation to let it unblocked when the hopper is obstructed by materials. Both the main hydraulic transmission system and mixing system can be controlled automatically or manually.

With innovation of valve system and hydraulic system, concrete pump develops in the direction of high power and reliability. Many problems about critical technology have been solved.With the development of commercial concrete and the matched using of concrete mixer truck, the supply of reliable quality concrete has been balanced, which ensures the operating conditions of uninterrupted pumping. The problems about placing materials also have been solved after appearance of various placing devices. That will make concrete pump works efficiently and enlarge its applicable range.