Design: API 6D Structural Length: API 6D / AMSE B16.10 Flanged ends: ASME B16.5 / MSS SP44 Butt-welding ends: ASME B16.5 Test & Inspection: API 6D / AP 598 Pressure Range: PC1.6 ~ 15.0 Mpa (Class150 ~ 900) Diameter Range: DN25 ~ 900mm (1" ~ 36") Driving Mode: Handle, Gear, Air-operating, Hydrodynamic, Electric etc. Applicable Medium: Petroleum, natural gas, water and corrosive media Products Features: 1. Cast/weld body; 2. The seal ring uses the floating seat ring structure with O-ring sealed and pre-tightening force applied to have inlet and ourlet dual-way sealed; the open-close moment with this structure is only 1/2 that of the common valves 3. PTFE metal-to-metal seated 4. The wedge disc of the valve with flow guide hole is always fitted with sealing face whether in full open/close status to have the sealing face protected without being directly eroded by the medium so as to extend the duration; 5. This valve uses the packing stracture with the ability of self-sealing, no need constant adjustment; besides, an assisting sealing frease injection structure is set in the packing to assure a true null leak