Specification
Dual Plate Brass Swing Double Disc Bronze Wafer Check Valve
I. Product Overview
NWV dual-plate swing wafer check valves are constructed from C95300/C95400 bronze alloys, designed to ASME B16.10 and API 594 standards. The dual plates rotate around a pin to prevent backflow automatically, covering DN50-DN300 (2″-12″) with Class 150 (PN20) pressure rating and -20℃~120℃ temperature range. Suitable for water, seawater, and mildly corrosive media, they excel in municipal water supply, marine, and food processing applications.
II. Core Technical Parameters
Specifications & Operating Range
Nominal Diameter: DN50/80/100/150/200/250/300 (2″/3″/4″/6″/8″/10″/12″)
Pressure Class: Class 150 (PN20, test pressure 3.0MPa)
Temperature Range: -20℃~120℃ (standard), -40℃~150℃ (high-temperature bronze option)
Media Compatibility: Freshwater, seawater, non-corrosive oils, food-grade liquids
Materials & Sealing System
Body/Disc: C95300 aluminum bronze (tensile strength ≥540MPa), C95400 nickel-aluminum bronze (seawater-resistant)
Sealing Pair: Bronze metal seal (Ra≤1.6μm), optional NBR rubber lining (leakage rate ≤0.1%)
Connection: Wafer Type (fits ASME B16.5 flanges)
Pin Shaft: 316 stainless steel (HRC30-35), erosion-resistant
Mechanical Performance
Opening Pressure: ≤0.03MPa (forward flow resistance)
Closure Response Time: ≤0.5s (triggered by backflow)
Fatigue Life: 100,000 cycles without seal failure (GB/T 13932)
