1. 4(5)-section folding p;acing boom with infinitely variable speed, each section can work independently. 2. The newest closed loop circuit hydraulic system with constant output. Full power PTO discharges the direction change valve block on the main circuit. Comparing to open loop circuit, pressure loss is reduced by 3 MPa, energy saved 10% and reduction of heat. The direction change is no impact, work stably and effectively. 3. S transfer tube with automatic compensation has higher suction rate, lower noise, little resistance and wearing. 4. Remote control box, light in weight, easy portable, accurate operation. 5. The pumping can meet with requirements of different displacement with infinitely variable speed. 6. The hydraulic system is equipped with patented product-SN valve. The valve decreases the impact from direction chage and serious vibration that happens in concrete pump, and improves the stability for whole machine. 7. The placing boom is made of high strength steel with variable cross-section and equal strength disign, light in weight and avoiding the resonance area. 8. The hydraulic pumping system is flexible direction chage, enables the pump to delivery concrete with stable flow pressure and decreases boom's vibration effectively. 9. The control valve of placing boom is electronic proportional valve imported form German Hawe Co., which provides stable work and little vibration. 10. The centralized lubrication system for the whole machine is easy maintenance, and can automatically lubricate with hydraulic oil even forgetting greasing. 11. Automatic negative rotation mechanism. When bigger aggregate is blocked in the hopper, the agitator blade can automatically rotate in negative direction for several seconds then rotate in positive to avoid damage to the hopper. 12. Manual infinitively variable speed or radio remote proportional control is uesd in the automatic displacement control system for easy operation. 13. The system of high-low pressure switch.
