... .550Supereme Suitable Temperature300°C250°C1000°CAcid resistanceAcid nonresistanceacidproofacidproofAlkali resistanceAlkaliproofAlkal nonresistanceAlkaliproofRoughness of Surfacemore than1.0μmmore than2.5μmless than0.2μmLifespan ... oil…*Cosmetics: Perfumes, lotions, creams, pastes, shampoo and make-up...*Others: ink, reagents, chemicals.Working principle:The Spool Valve is based on a ...