Quick-open/close fitting with integrated safety interlock and alarm functions. Available in horizontal and vertical configurations, both operable manually or electrically. Special variants available: low-temperature (-45°C) and H₂S-resistant (sour service). Lip-type self-energised seal ensures reliable sealing; electric/manual operation for fast, efficient opening. Nominal Diameter: DN250–DN2,000 Design Pressure: ≤42 MPa Design Temperature: -45°C to +100°C Opening Force: <200 N Door Angle: 0–270° Explosion-proof Grade: Ex dⅡBT4 Protection Grade: IP65–IP67 Working Media: Clean gas, coalbed methane, sour wet gas, crude oil, refined products Main Applications: Long-distance oil and gas pipeline stations, oilfield gathering stations, CBM wellsites, chemical plants