Our expertise as a butterfly valve manufacturer in China is unmatched.
Valve Types: Concentric Butterfly Valve, Double Offset Butterfly Valve, Triple Offset Butterfly Valve
Design Standards: API 609 Cat A and B, EN 593
Size Range: 2 - 72 Inch
Pressure Range: Class 150-2500 LB
End Connections: Flanged (FF, RF, RTJ), Butt Weld (BW), Wafer, Lug
Material Types: Iron, Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Valve Types: Concentric Butterfly Valve, Double Offset Butterfly Valve, Triple Offset Butterfly Valve
Design Standards: API 609 Cat A and B, EN 593
Size Range: 2 - 72 Inch
Pressure Range: Class 150-2500 LB
End Connections: Flanged (FF, RF, RTJ), Butt Weld (BW), Wafer, Lug
Material Types: Iron, Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
As a distinguished concentric butterfly valve manufacturer in China, quality is our top priority.
Design Standards: API 609 Cat A, EN 593, BS 5155
Size Range: 2 - 72 Inch
Pressure Range: up to PN20
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ)
Material Types: Iron, Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Seat Type: NBR, Viton, EPDM, PTFE
Disc Fixing Type: With pin and without pin
Top Mounting: ISO 5211 top mounting is available
Operation Types: Lever, Gear, Pneumatic Actuator
Bosseal Valve advantages: 0 Leakage, low Torque, Long working life
Design Standards: API 609 Cat A, EN 593, BS 5155
Size Range: 2 - 72 Inch
Pressure Range: up to PN20
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ)
Material Types: Iron, Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Seat Type: NBR, Viton, EPDM, PTFE
Disc Fixing Type: With pin and without pin
Top Mounting: ISO 5211 top mounting is available
Operation Types: Lever, Gear, Pneumatic Actuator
Bosseal Valve advantages: 0 Leakage, low Torque, Long working life
With our state-of-the-art facilities and skilled workforce, we're able to deliver top-quality double offset butterfly valves as one of the leading manufacturers in China.
Design Standards: API 609 Cat B
Size Range: 2 - 72 Inch
Pressure Range: Class 150-300 LB
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ)
Material Types: Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Seat Type: PTFE, RPTFE, PPL (for higher temperature), RPTFE+Metal (Fire Safe)
Top Mounting: ISO 5211 top mounting is available
Operation Types: Lever, Gear, Pneumatic Actuator
Bosseal Valve advantages: 0 Leakage, low Torque, Long working life, Low Emission, Bi-direction and fire safe
Design Standards: API 609 Cat B
Size Range: 2 - 72 Inch
Pressure Range: Class 150-300 LB
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ)
Material Types: Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Seat Type: PTFE, RPTFE, PPL (for higher temperature), RPTFE+Metal (Fire Safe)
Top Mounting: ISO 5211 top mounting is available
Operation Types: Lever, Gear, Pneumatic Actuator
Bosseal Valve advantages: 0 Leakage, low Torque, Long working life, Low Emission, Bi-direction and fire safe
Our company is widely recognized as one of the most reliable triple-offset butterfly valve manufacturers in China.
Design Standards: API 609 Cat B
Size Range: 2 - 72 Inch
Pressure Range: Class 150-2500 LB
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ), BW
Material Types: Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Seat Type: Metal with Hard facing
Disc Seat:
Solid metal seal ring (for bi-direction service)
or laminated graphite+SS seal ring
or laminated PTFE+SS seal ring (for service need cleanness like seawater)
Top Mounting: ISO 5211 top mounting is available
Operation Types: Lever, Gear, Pneumatic Actuator, Motor Actuator
Bosseal Valve advantages: 0 Leakage, low Torque, Long working life, Low Emission, Bi-direction and fire safe
Design Standards: API 609 Cat B
Size Range: 2 - 72 Inch
Pressure Range: Class 150-2500 LB
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ), BW
Material Types: Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Seat Type: Metal with Hard facing
Disc Seat:
Solid metal seal ring (for bi-direction service)
or laminated graphite+SS seal ring
or laminated PTFE+SS seal ring (for service need cleanness like seawater)
Top Mounting: ISO 5211 top mounting is available
Operation Types: Lever, Gear, Pneumatic Actuator, Motor Actuator
Bosseal Valve advantages: 0 Leakage, low Torque, Long working life, Low Emission, Bi-direction and fire safe
Why Choose Our Butterfly Valves
Bi-Direction Sealing
The unique design of stem, seat and disc ensure Tight Shut Off in both directions for the offset butterfly valves even under full pressure.
Easy for Actuator Mounting
ISO 5211 mounting flange can be provided upon request, connection dimensions are international standard and can be used for global projects.
Good Durability&Low Operation Torque
The afvanced design of sealing, bearing and packing can minimize the wear and operation torque, make it a great and cost efficient choice for actuation package.
High Flow Efficiency
As quarter turn valve the short travel enable the disc and seat leave quickly, it make the valve with fast response and good flow efficiency .
Concentric Butterfly Valve
No Offset, stem pass the disc center, seat and pipeline bore in the center line. Normally with an Iron body and rubber seat (NBR, Viton, EPDM) or PTFE seat, widely used for water treatment service. But due to the rubber lining, normal working pressure is lower than PN20.
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Double Eccentric Butterfly Valve
With 2 offsets, long working life and suitable for frequent operation service but sealing relies on elastic deformation between disc and seat, metal seat sealing performance is not as good as soft seat therefore PTFE seat is more often applied, and working pressure is normally under 300 LB.
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Triple Eccentric Butterfly Valve
With 3 offsets, normally with metal seats and it makes triple offset butterfly valves suitable for wide temperature and pressure ranges.
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Offsets of Butterfly Valves
1st offset: shaft centerline behind disc centerline, it can reduce the contact between disc and seat fore fully close, and allow for a continuous engagement of the seating surface..
2nd offset: shaft centerline offset from centerline of the valve and pipe, the sealing surface is linear so when open the valve the disc seal will quickly leave the seat and it can significantly reduce the friction/wear of sealing surfaces
3rd offset: the disc seat contact axis is offset from the pipe axis, minimizing the contact of seats and having better sealing performance.
2nd offset: shaft centerline offset from centerline of the valve and pipe, the sealing surface is linear so when open the valve the disc seal will quickly leave the seat and it can significantly reduce the friction/wear of sealing surfaces
3rd offset: the disc seat contact axis is offset from the pipe axis, minimizing the contact of seats and having better sealing performance.
Comparison
Compared to other valve types, it’s obviously cost and space-saving and has a bigger size range, the operation is faster and there is less restriction and wear between the disc and seat sealing surface. It will ensure longer cycling life and reduce the total cost of ownership. But at the same time, the disc will cause pressure loss even in a fully open position.
Classification
According to different services, the butterfly valve can be designed as a soft seat or metal seat, concentric or eccentric design. It includes a resilient seated butterfly valves for long working life and tight shutoff, and also high-performance butterfly valves(HPBV) for specified temperature and fluid application.
Butterfly Valves Seats
Soft Seat
Valves like rubber or PTFE lined valves are more suitable for water or other highly corrosive liquids(like sea water), gases and slurries.
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Metal Seat
Valves have better capability for high/low temperature and high-pressure service.
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Best QUALITY Butterfly Valves FOR YOU
A butterfly valve is widely used in the pipeline for isolation and regulating applications.
The disc is plate type in the center of the pipe, rotated a quarter turn from close to open by the stem through it.
If you need any support about our Butterfly Valves, pls contact us!
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The disc is plate type in the center of the pipe, rotated a quarter turn from close to open by the stem through it.
If you need any support about our Butterfly Valves, pls contact us!
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Building 2, NO.59, Songshan Road, SND, Suzhou, China