Ceramic Piston and Spool Valve Material:ceramic Range of filling level: 0.2~500 Usage: ... BOSCH, B+S, GROENINGER, made in Germany, Italy, America and Japan.*Pharmaceutical: Topicals and parenterals: injectable in vials, ampules, syringes, enema… Enterals ... : Perfumes, lotions, creams, pastes, shampoo and make-up...*Others: ink, reagents, chemicals.Working principle:The Spool Valve is based on a balanced ...