Double disc gate valve is a kind of ceramic gate valve. Therefore, its structure and working principle are the same as those of gate valve. Its opening and closing body (valve plate) is driven by the valve stem to move the valve seat sealing surface up and down, which can connect or cut off the fluid passage. When the valve is partially opened, eddy currents are generated on the back of the gate plate, which can easily cause erosion and vibration of the gate plate, and also easily damage the valve seat sealing surface. It is difficult to repair. It is usually suitable for working conditions that do not need to be opened and closed frequently and keep the gate plate fully open or fully closed.
Double Disc Gate Valve Specification
- Body: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel
- Drain Box: Cast iron, Ductile Iron
- Disc: Carbon Steel, Stainless Steel, Brass
- Top Wedge: Carbon Steel, Stainless Steel, Brass
- Stem Nut: Ductile iron, Brass
- Stem: Cast iron, Ductile iron
- Bonnet: Cast Iron, Ductile iron
- Packing: PTFE, Graphite
- Gland: PTFE, Graphite
- Gear Actuator: Cast Iron, Ductile Iron
- Dispersing Plug: Cast Iron, Ductile Iron
- High Intensity Spring: Carbon Steel, Stainless Steel, Brass
- Orbit Roller: Carbon Steel, Stainless Steel, Brass
- Nominal Diameter: DN40 to DN800
- Nominal Pressure: PN200 to PN500
- Design and Manufacture: API600, ASME B16.34
- Face to Face Dimension: ASME B16.10
- Buttweld Dimension: ASME B16.25
- Inspection and Test: API598
double disc gate valves
Features of double-disc gate valve
1. When the system is working normally, the gate opens and closes at a uniform speed of 1.0m/min; and the closing in the event of an accident such as a power failure is divided into two stages: fast closing and slow closing. 100-20% opening is fast closing, and the time is 10 (S). 20-0% opening is slow closing, and the time is 40 (S).
2. Used as a stop valve and check valve at the outlet of a water pump, the valve also has a valve stem locking device. Ensure safe operation. 3. The Z943T gate valve uses a new type of electric device, which can be operated locally or remotely, and can meet the requirements of computer program control. The control is accurate, safe and reliable.
Hot Tags: double disc gate valve, China double disc gate valve manufacturers, suppliers, factory, Cast Steel Globe Valve, Fisher Ball Valves, Cast Gate Valve, ss gate valve, gate valve stainless, Iron Valves