Specification
NWV VALVE API ASME Fland Ends Sleeve Type Soft Sealing Bronze Plug Valves
I. Product Overview
NWV VALVE flanged end sleeve-type soft-seal bronze plug valves are constructed from aluminum bronze, silicon bronze, etc., designed to ASME B16.34, BS 5153, and EN 12516 standards. The precise fit between PTFE sleeves and bronze plugs ensures efficient sealing. Covering DN15-DN100 (1/2″-4″) with pressure classes Class 150-Class 300 (PN16-PN50), they operate at -20℃~150℃, widely used in industrial pipelines for water, steam, oil, gas, etc., especially in food, pharmaceutical, and marine sectors requiring corrosion resistance and hygiene.
II. Core Technical Parameters
Specifications & Operating Range
Nominal Diameter: DN15/20/25/40/50/65/80/100 (1/2″-4″)
Pressure Class: Class 150 (PN16), Class 300 (PN50)
Temperature Range: -20℃~150℃ (standard), -40℃~200℃ (special configuration)
Media Compatibility: Freshwater/seawater, steam (≤1.6MPa), oils, gas, weak acid-base solutions (pH 6-9)
Materials & Sealing System
Body/Bonnet: ASTM B61 aluminum bronze (C83600), ASTM B62 silicon bronze (C95800)
Plug: Monolithic aluminum bronze, surface hardened (HV≥200)
Sleeve: Modified PTFE (25% glass fiber reinforced), Shore hardness D65-75
Seal Leakage Rate: ≤1×10⁻⁹m³/s (API 598 Class VI)
Mechanical Performance
Opening/Closing Torque: DN50 Class 150 valve ≤80N·m (manual)
Service Life: 50,000 cycles without leakage (GB/T 13932)
Hydrostatic Strength: Shell test pressure 2.4MPa (PN16), seal test pressure 1.76MPa
