SDMP company produce air poppet valves and mold insert stamp recycle chapter for plastic injection mould industry,
products are made of antirust material of sus420, X4Cr13Ku,1.2083,1.4034 per DME,MISUMI,CUMSA.spring origin in U.S can adopt temperature from 220-260℃.
working atmosphere from 1.5-6 bars.Hardness: HRC48-54