Description
Technical Specifications
SPECS Bellow Three Way Control Valve can prevent external leakage caused by packing loss, it is safer to be used in high-risk media.
Leakage at various points in pipelines found in chemical plants creates emissions Critical leakage points include flanged gasket joints and the valve gland packing, etc. Today the chemical process industry is gearing itself towards safer technology for better environmental protection and it has become every process engineer's responsibility to design plants that limit damage to the environment through the prevention of leakage of any toxic chemicals. Leakage from the Valve gland or stuffing box is normally a concern for the maintenance or plant engineer. This leakage means:
a) Loss of material
b) Pollution to the atmosphere
c) Dangerous for plant employees.
This leakage can be reduced considerably by using the bellow seal Valve.
Applicable Standards
Design & Manufacture Standard: IEC 60534-2006
Face to Face: Manufacturer's Standard
End Connection: ASME B16.5, EN1092-1, GOST33259, ASME B16.25
Test Standard: IEC60534-4
Products Range
Size: 1 1/2"~24"
Pressure Rating: ASME CLASS 150~600
Material: Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel
End: Flanged (RF, RTJ), Butt Weld, Socket Weld, Thread.
Temperature Range: -196℃~550℃
Seat Leakage：ANSI IV or ANSI Ⅵ(bubble-tight)
Bonnet Type: Bellow
General applications
Heat Transfer media: hot oil is commonly used in industries such as synthetic fibres/POY (Partially Oriented Yarn). However, there is always a risk of fire due to hot oil spillage on highly inflammable chemicals. Here, bellow seal valves can stop the leakage.
Vacuum/ultra high vacuum: some applications require a vacuum pump to continually extract air from a pipeline. Any conventional Valves installed on the pipeline can allow external air to enter the pipeline thorough the Valve stuffing box. Hence the bellow seal Valve is the only solution to prevent air from passing through the stuffing box.
Highly hazardous fluids: for media such as chlorine, hydrogen, ammonia and phosgene, the bellow seal Valve is an ideal design as leakage through the gland is totally eliminated. Nuclear plant, heavy water plant: in instances where radiation leakage is to be prevented at all times, the bellow seal Valve is the ultimate choice. Costly fluids: in some applications leaks need to be avoided simply because of the high cost of the fluid. Here, an economic assessment often favours the use of bellow seal Valves. Environmental standards: around the world, standards regarding emissions and the environment are getting more stringent day by day. It can therefore be difficult for companies to expand within existing premises. With the use of bellow seal valves, expansion without additional environmental damage is possible.
