We only use virgin materials.
Cheap or low-quality engine pumps are made of mixed scrap material, while their parts are thin and have low strength, KOSHIN’s aluminum parts are casted with high dimensional accuracy and durability.
We produce many pump components, such as die-casting parts, frames and resin parts by ourselves, as well as our in-house designed and created molds. Every manufacturing of pump parts are organized from selecting raw material to proceed.
800t aluminum diecast system
Welding robots and powder painting system (from the 70th anniversary company brochure)
Every engine pump is tested air leakage and specification by our experienced factory workers at the assembling line.
Leakage from mechanical seals or die-casting parts are checked two times at high pressure (2.0kgf/cm3) and low pressure (0.1kgf/cm3).
KOSHIN guarantee eight-meter suction head of all engine pumps.
Improvements of our factories (from the 70th anniversary company brochure)