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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!
Ce que nos clients disent de nous
Adresse
20, rue Xingyuan Sud, comté de Zaoqiang, ville de Hengshui, province du Hebei, Chine
