Van đóng khẩn cấp (Emergency shutdown valve)

When a fire breaks out and a large quantity of water is in great need for fire fighting purpose, the emergency shut down valve cuts off the domestic water supply immediately so as to ensure enough fire fighting water. When the fire fighting is over and the pressure in terms of water use has dropped, the valve switches on automatically to stay in the constantly open state and the normal domestic water supply is restored. This valve makes it unnecessary to set a separate fire fighting water supply network in the system, thereby greatly reducing the construction cost and water consumption. Furthermore, the valves is high in control sensitivity, safe, reliable, simple to debug and offers a long service life.
Standard and regulation
Flange connection dimension: GB/T 17241.6-1998, GB/T 9113.1-2000
Nominal pressure: PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.5MPa
Nominal diameter: DN20～450mm
Suitable medium: Water
Suitable temperature: ≤80℃
Inspection and test: GB/T 13927, API598
Body material: Cast iron, Ductile cast iron