High Quality High Performance Triple Eccentric Butterfly Valve Lug Type
what's triple eccentric butterfly valve lug ?
Triple eccentric butterfly valve lug ,also known as triple offset butterfly valve lug ,is one kind of high performance butterfly valves,designed for working conditions of high pressure,high temperature,and high frequencies of open and close.
There are many characteristics for the triple eccentric butterfly valves lug .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 lug (also known as triple offset butterfly valve) has been invented in this case.
the zero leakage of our triple eccentric butterfly valve lug 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.
The Triple offsets 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 above is the introduction of the triple eccentric butterfly valve lug . It is a kind of high-performance butterfly valve currently used in many fields.
Main features of triple eccentric butterfly valves lug
- Easily replaceable multi-layered duplex and graphite seal rings.
- Highly strengthened one-piece shaft designed to transfer/maintain torque efficiently.
- Braided graphite bearing protectors prevent dirt intrusion, ensuring constant running torque and valve operability.
- Two-piece packing gland and graphite packing minimize external emission risk.
- Key secured shaft-to-disc connection for maximum shaft integrity.
- 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 lug
| 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) |
| Parts | Materials |
| Body | Carbon steel, Stainless steel,Duplex steel |
| Disc | Carbon steel, Stainless steel,Duplex steel,Alloy steel |
| Body seat |
13CR/STL/SS304/SS316 |
| Seat |
Muilti-layer(SS+Graphite or SS+PTFE)/metal-metal |
Product Show:
Appilcation:
This kind of Triple Eccentric Butterfly Valve lug 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.
