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Butterfly Valve
1.Product Overview
Butterfly valves are quarter-turn rotational motion valves designed for reliable flow control in industrial piping systems, featuring a circular disc that rotates 90° to regulate media flow.
Key Advantages
✔ Compact & Lightweight - 30-50% lighter than gate valves
✔ Quick Operation - 90° rotation enables fast open/close
✔ Low Pressure Drop - Streamlined disc design minimizes flow resistance
✔ Cost-Effective - 40-60% lower cost than equivalent ball valves
✔ Versatile - Suitable for liquids, gases, and slurries
2. Valve Types & Construction
By Disc Configuration
|
Type |
Angle |
Seal Type |
Max Pressure |
Applications |
|
Concentric |
0° offset |
Resilient seat |
PN16 |
Water, HVAC |
|
Double Offset |
10-15° |
Metal/Polymer |
PN25 |
Oil & Gas |
|
Triple Offset |
20-30° |
Metal-to-metal |
PN100 |
Steam, Chemicals |
Body Materials
Cast Iron (GG25) - General water services
Ductile Iron (GGG40) - Higher pressure applications
Stainless Steel (CF8M) - Corrosive/HT media
Alloy 20 - Acid services
FRP - Chemical processing
3. Technical Specifications
|
Parameter |
Specification Range |
|
Size Range |
DN50-DN3000 (2"-120") |
|
Pressure Rating |
PN6-PN100 (ANSI 150-600) |
|
Temperature Range |
-20°C to +600°C (material dependent) |
|
Leakage Class |
Class IV (standard), Class VI (bubble-tight) |
|
Operation Torque |
20-5000 Nm (actuator dependent) |
4. Seat & Seal Options
Seat Materials
EPDM - Water/steam (<120°C)
NBR - Oil/fuel services
PTFE - Chemical resistance (+200°C)
Metal Seats - High-temp (>400°C)
Sealing Technology
Double Eccentric Design - Reduces wear in high-cycle applications
Fire-Safe - API 607/ISO 10497 certified
Cryogenic - Extended stem for LNG services (-196°C)
5. Actuation Methods
|
Type |
Torque Range |
Speed |
Control |
|
Lever |
<500 Nm |
Manual |
On/Off |
|
Gearbox |
500-3000 Nm |
Slow |
Positioning |
|
Pneumatic |
20-2000 Nm |
1-5 sec |
Modulating |
|
Electric |
10-5000 Nm |
10-60 sec |
Smart |
|
Hydraulic |
5000+ Nm |
<1 sec |
High-force |
6. Industry Applications
✔ Water Treatment - DN300+ wafer valves for pump control
✔ Oil & Gas - Triple offset valves for pipeline isolation
✔ Power Plants - High-temp metal seat valves in steam lines
✔ Chemical - Lined valves for acid services
✔ Marine - Compact lug-type valves for seawater
7. Standards Compliance
API 609 - Design standard
ISO 5752 - Face-to-face dimensions
EN 593 - European butterfly valve standard
ASME B16.34 - Pressure testing
TA-Luft - Low-emission standards
8. Quality Assurance
100% Pressure Test - Shell test + seat test per API 598
Material Certification - 3.1/3.2 mill certificates
NDT Inspection - RT/UT for critical services
Fire Testing - Third-party certified to API 607
9. Why Choose Our Butterfly Valves?
✅ Full Range Sizes - Stock from DN50-DN1200
✅ Custom Configurations - Special coatings, extended stems
✅ Smart Ready - IoT-enabled actuators available
✅ Global Certifications - CE, CRN, GOST, API monogram
Request CAD models, CVS curves, or sizing software!
Butterfly Valve Customer Evaluation
Butterfly Valve FAQ
-
What types of butterfly valves do you supply?
We mainly supply wafer type, lug type, and double flange butterfly valves, with manual, pneumatic, and electric actuation options.
-
What materials are used for the butterfly valve disc and seat?
Disc materials include ductile iron, stainless steel 304/316; seat materials include EPDM, NBR, PTFE and Viton for different media.
-
Are butterfly valves suitable for high-pressure systems?
They are mainly designed for medium and low-pressure pipelines. We can also provide high-performance eccentric butterfly valves for higher pressure.
-
Can butterfly valves be used for flow regulation?
Yes, butterfly valves can realize stepless adjustment of flow and are widely used for on-off and throttling control.
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