Product Introduction
The Flanged Type Centerline Resilient Seated Butterfly Valve is designed for reliable shut-off and flow control in water treatment, HVAC, chemical, and industrial systems. With its double-flange connection structure, the valve provides superior stability, precise alignment, and easier installation in heavy-duty pipelines or systems with vibration or pressure fluctuations.
The concentric design ensures a tight seal between the disc and seat through uniform compression, offering excellent sealing performance, long service life, and minimal maintenance.
This type of valve is particularly suitable for larger diameters (up to NPS 96″ / DN2400), where strength and rigidity are essential.
Product Features & Advantages
High structural strength: Double-flange body ensures stable connection and alignment under high pressure or vibration.
Excellent sealing: Resilient seat provides zero-leakage performance in both flow directions.
Long service life: Replaceable seat and anti-corrosion coating extend operational lifespan.
Low torque, smooth operation: Precisely machined shaft and seat reduce friction for easy manual or automated operation.
Flexible actuation options: Compatible with lever, worm gear, pneumatic, or electric actuators.
Easy maintenance: Seat and disc can be replaced without removing the valve from the pipeline.
Difference & Advantages Compared to Wafer Type Butterfly Valve
Comparison Aspect Flanged Type Wafer Type
Connection Method Bolted between two flanges with full-face connection Clamped between two flanges
Installation Stability Higher—ideal for large-diameter or vibrating pipelines Lighter, simpler installation
Pressure Resistance Better under higher loads Suitable for medium pressure systems
Maintenance & Alignment Easier to align and maintain Requires careful flange alignment
Typical Application Large industrial systems, water plants, power plants Compact systems, limited space
Overall Advantage Stronger body, better sealing integrity, long-term reliability Lightweight and cost-effective
Technical Parameters
| Parameter | Specification |
| Size Range | NPS 2″ – 96″ / DN50 – DN2400 |
| Pressure Rating | Class 150 / PN10 / PN16 |
| Temperature Range | -20°C – +120°C / -4°F – +248°F |
| Body Material | Ductile Iron, Carbon Steel, Stainless Steel, Duplex Stainless Steel, … |
| Disc Material | Stainless Steel, Aluminum Bronze, Duplex Stainless Steel, … |
| Seat Material | EPDM, NBR, VITON, PTFE (customized available) |
| Stem Material | Stainless Steel (AISI 410 / 420 / 431) |
| Connection Type | Flanged type, compliant with EN 1092-2, ASME B16.5 |
| Sealing Type | Soft-seated, bi-directional sealing |
| Operation | Lever, Gearbox, Pneumatic actuator, Electric actuator |
Applications
Municipal and industrial water treatment systems
Power plants and energy distribution networks
HVAC and building piping systems
Petrochemical and light industry applications
Irrigation, desalination, and pipeline projects
Tianjin Dingliu valve Industry Co., Ltd. is a high-tech enterprise specializing in the valve and automation industry.
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