... -BRONZE C954 seat:EPDM,NBR,PTFE,VITON shaft:SS316/410 10 years professional butterfly Valve manufacture directly suppling:worm gear ... SS304/316,AL-BRONZE C954Seat: NBR ( Buan-N), EPDM, VITON, PTFEShaft & Pin: SS410, SS416, SS304, SS316Actuator: Lever,Worm Gear, Pneumatic and ... PaintBrand Name:NHV& any OEM BrandsCertificates&Approvals:ISO9001CE worm gear operated cast iron wafer butterfly valve dn250