Pneumatic slurry knife gate valve Ductile Iron- Gr. 60-40-18, 65-45-12, 80-55-06 Grey Iron-Class25,class30,class40 ISO9001:20 Pneumatic slurry knife gate valveZD is proud to offer products cast in many ferrous and non-ferrous alloys. Our material specialties include:Carbon and low/Medium Alloy Steel(Feneral Applications)*Dry Sand*No-Bake Sand(Polymer Sand)*InvestmentCommon Alloys produced are: ...