Demco Series NF-C Wafer Butterfly Valve: Heavy-Duty Performance
The Demco Series NF-C Butterfly Valve is the large-diameter counterpart to the NE-C series, specifically engineered to provide robust, high-performance isolation and throttling control for larger piping systems. Available in substantial sizes, the lug style body offers superior installation flexibility and structural integrity.
Key Features and Performance Advantages
- Large Diameter Range: Available in sizes from 14” to 36” (350mm to 900mm), catering to major pipeline and process applications.
- Reduced Operating Torque: Equipped with bronze bearings installed on both the upper and lower stems.6 This feature ensures smooth operation and significantly reduces the torque required for actuation, lowering the strain on the operator or automated actuator.
- Installation Alignment: The corresponding wafer body style (which shares the same core design) includes two drilled locator lugs at the top and bottom, specifically designed to self-center and align perfectly with ASME Class 150 flanges. This guarantees proper positioning during installation, minimizing stress and potential leakage.
- Durable Resilient Seating: Utilizes the same reliable, field-replaceable resilient seat found in the NE-C series for dependable shut-off.
Technical Specifications
| Parameter | Detail |
| Series | NF-C |
| Body Style | Lug (also available in Wafer) |
| Sizes | 14” to 36” (350mm to 900mm) |
| Flange Compatibility | ASME Class 150 |
| Stem Bearings | Bronze Bearings (Upper and Lower) |
| Seating | Resilient Seated |
| Actuation | Bare Stem or Gear Operator (Most common due to size) |
Applications
The NF-C series is the preferred choice for large-scale, heavy-duty applications, including:
- Water and Wastewater: Main distribution lines, raw sewage, and treatment plant isolation.
- Power Generation: Large-diameter cooling water and utility services.
- Petrochemical/Industrial: High-volume process lines requiring reliable, low-maintenance isolation.
Do you need specific material configurations (body, disc, or seat) for a large-diameter NF-C valve?
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