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The HONGDA S-valve series of high-pressure pumps, Z-gate-valve series of medium-pressure pumps and D-butterfly-valve series of low-pressure pumps are concrete transport machines widely used for the construction works in city construction, bridge construction, electric power and other energy source facilities and so on. The machines adopt world-level advanced technologies such as open hydraulic loop, distributing valve auto-compensation clearance, constant power control, all-hydraulic automatic reverse and electric proportional control. The company has carried out in-depth and meticulous studies and experiments in many aspects like the self-lubrication of concrete pistons and has obtained many patents. The HONGDA trailer pump is a world-level new product which is developed on the basis of combining latest domestic and overseas technologies. HONGDA trailer pumps cover three series and more than twenty models, so HONGDA is a professional production base with all models and specifications of trailer pumps in CHINA, which can fully meet the various needs of all customers. All HONGDA trailer pumps are assembled through streamlined production. The company strictly controls all the machining processes and the assembly quality, giving final test to every trailer pump through simulated working conditions and overload experiments to ensure zero fault in customers’ first operation.