Founded in 1995, China Dongda Power Industry Co., Ltd. is one of the few oil cylinder manufacturer and distributor in China that has patents on the generator, motor, power supply, engine, alternator, diesel and gearmotor design, supply and sale. Our custom oil cylinders has obtained the certifications of ISO9001-2000, GS/TUV, CE, VL, EPA, QHS, SON, CAP and SRS and we have won EPA 2005 Motor Year Certification. Our 30 QC staff carefully performs inspections at every stage of production, from the time we receive raw materials to packaging. Noise, power, and stability are tested to ensure that our engines can endure 580 hours of constant use. We also can design and deliver OEM/ODM samples in one month.

Jianhua is specializing in various kinds of construction machinerycylinders. The specifications and types can meet the requirements of over 70 kinds of excavators such as KOMATSU, KOBELCO, HITACHI, KATO, SUMITOMO, CAT, etc. And over 20 kinds of bulldozers like KOMATSU, CAT. In addition, we can design and produce hydraulic cylinders according to customers' requirements. The cylinder liners are made of cold drawn seamless steel tubes with strong honing technique. The cylinder length can reach up to 3 m with diameters from Æ40 to Æ400. The piston rods are made of chrome steel with special heat treatment. The durionising technique is applied to the surface, which makes it high in smooth finish with tough inside and hard outside. The piston rods' diameters are from Æ5 to Æ140, equipped with quality NOK seals. The quality of our cylinders is guaranteed by the test of high-pressure test bed. We can always meet your requirements any time with abundant inventory of finished products and attachments. We would like to serve you with our quality products, reasonable price, and timely delivery.

Jianhua is specializing in various kinds of construction machinerycylinders. The specifications and types can meet the requirements of over 70 kinds of excavators such as KOMATSU, KOBELCO, HITACHI, KATO, SUMITOMO, CAT, etc. And over 20 kinds of bulldozers like KOMATSU, CAT. In addition, we can design and produce hydraulic cylinders according to customers' requirements. The cylinder liners are made of cold drawn seamless steel tubes with strong honing technique. The cylinder length can reach up to 3 m with diameters from Æ40 to Æ400. The piston rods are made of chrome steel with special heat treatment. The durionising technique is applied to the surface, which makes it high in smooth finish with tough inside and hard outside. The piston rods' diameters are from Æ5 to Æ140, equipped with quality NOK seals. The quality of our cylinders is guaranteed by the test of high-pressure test bed. We can always meet your requirements any time with abundant inventory of finished products and attachments. We would like to serve you with our quality products, reasonable price, and timely delivery.