High Quality Double Flange Metal Seat Triple Eccentric Butterfly Valve China Manufacture
what's Triple eccentric butterfly valve flange ?
Triple eccentric butterfly valve flange (also known as triple offset butterfly valve) has been invented in this case.
There are many characteristics for the triple eccentric butterfly valves flange.There is integral-to-body valve seat,with optimized seating angles,coated with anti-worn materials suitable for millions of opening and closing,stainless steel for corrosion resistance,and materials for high temperature.and the multi-layer soft sealing ring or hard sealing ring are fixed on the butterfly disc. This type of design allows makes the triple eccentric butterfly valve more resistant to thermal shocks or pressure peaks and corrosions,compared with traditional butterfly valves.
Triple eccentric butterfly valve flange also known as triple offset butterfly valve,is one kind of high performance butterfly valves,designed for working conditions of high pressure,high temperature,and high frequencies of open and close.
the zero leakage of our triple eccentric butterfly valve flange is implemented by the composite stainless steel sealing ring mounted on the disc. The design of right-angled rotation with zero friction is implemented by the distinctive triple eccentric principle. It eliminates the friction between the seat and the sealing ring in 90º rotation,Smaller torque means we can start the valve with a smaller actuator,to save a lot of cost and space.
When the valve is closed, the torque of the transmission mechanism can increase to provide compensation. This greatly improves the sealing performance of the triple eccentric butterfly valve and prolongs the service life of it.
triple eccentric butterfly valve flange design
- The first offset is that the valve shaft is behind the disc shaft so that the seal can completely close the entire valve seat.
- The second offset is that the centerline of the valve shaft is offset from the pipe and valve centerline to avoid interference from valve opening and closing.
- The third offset is that the seat cone axis deviates from the centerline of the valve shaft, which eliminates friction during closing and opening and achieves a uniform compression seal around the entire seat.
The above is the introduction of the triple eccentric butterfly valve flange. It is a kind of high-performance butterfly valve currently used in many fields.
Main features of triple eccentric butterfly valves flange
- Stellite® grade 6 seat overlays provide excellent durability.
- Open/closed disc references and external disc position indicator simplify installation/removal procedures to API 609.
- Composite metal seal ring ensures perfect seating force distribution around precision-machined seat circumference.
- Flange spot facing ensures bolting nut and washer planarity, increasing joint reliability and safety.
- Spiral wound gaskets, seal and packing rings replaceable with no special tools.
- Heavy duty bearings withstand high pressure loads and wear.
- Internal and external shaft extrusion risk handling complies with international standards.
Technical specifications of triple eccentric butterfly valves flange
| Design | API 609/ASME B16.34 |
| End Connection | Wafer type,Lug type,Flanged type,Buttweld type |
| Operation | Manual/Pneumatic/Electric |
| Size Range | NPS 2"-60"(DN50-DN1500) |
| Pressure Rating | ASME Class150-300-600-900(PN16-PN25-PN40-63-100) |
| Flange standard |
DIN PN10/16/25, ANSI B16.1, BS4504, ISO PN10/16,BS 10 Table D, BS 10 Table E |
| Face to face |
ANSI B16.10,EN558-1 Series 13 &14 |
| Temperature | -29℃ to 450℃(depending the materials chosen) |
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Appilcation:
This kind of Triple Eccentric Butterfly Valve flange is suitable for handling the wide range of fluids in oil & gas, petrochemical, chemical, coal, desalination, waterworks, food & beverage industries. Also for solar, geothermal and hydro power, fossil fuels, district heating, mining, shipyards and the aerospace sectors.
