marine valve worm butterfly clip center; Features: Operation mode:manually operation,pneumatic,hydraulic, Marine valves worm butterfly clip center;Valves standard : GB,JB,JIS,API,CBM etc.Material : cast steel,cast iron,cast copper,forged steel,stainless steel,plastics,etc.Certification : CCS,LR,BV,ABS,DNV,GL,KR. marine valves worm butterfly clip center