The Emergency shut-off valve adopts three-eccentric metal airtight butterfly valve structure form, the fast cutting device adopts the spring fast cut close, the oil cylinder reposition structure. There is a switch on the on-site control box to choose the in-situ operation or computer remote control.The quick cutting valve cylinder has the horizontal, oblique and other design square type, can be chosen according to the actual situation of the scene.Nominal size: DN1200-2600， Nominal pressure: 0.05-0.6mpa.  Drive mode: hydraulic open and spring close: Leakage: 0.05% in closed position, opening time : 0.5-1 second to close 95%, and the left 5 percent will be closed in the 5s.