Gear Operated Wafer PTFE Lined Butterfly Valve

This industrial-grade cast steel fully PTFE-lined wafer butterfly valve is designed for reliable isolating and cut-off control in highly corrosive and chemical-aggressive environments. Equipped with a robust worm gear operator, it ensures smooth torque transmission and precise flow throttling. The comprehensive Teflon (PTFE/FEP) lining encapsulates the entire internal wet path, shielding the strong cast steel body from acids, alkalis, and high-temperature mediums, delivering long-lasting bubble-tight sealing performance.

Technical Specifications

• Valve Design: Fully PTFE/FEP Lined Wafer Butterfly Valve

• Model Configuration: D371F46 Type

• Actuation Method: Manual Worm Gear Operator with Handwheel

• Body Construction: Heavy-Duty Cast Steel (WCB)

• Lining Protection: Full premium-grade PTFE / F46 encapsulation

• Disc Design: Cast steel core fully armored with thick PTFE layer

• Connection Standards: Wafer type, universal fit for ASME B16.5, DIN EN 1092, JIS B2220

• Pressure Class: PN10 / PN16 / Class 150

• Nominal Size Range: Available from DN50 up to DN600

• Sealing Tightness: Bi-directional zero leakage, bubble-tight shutoff

• Service Application: Severe chemical acids, corrosive fluids, toxic mediums, and water treatment

• Temperature Sustainability: Stable performance in continuous high-temperature systems up to 150-180 degrees Celsius

• Face-to-Face Dimension: Compliant with API 609, ISO 5752, and EN 558 series 20

• Top Mounting Pad: ISO 5211 standard for easy integration of actuators

• Stem Configuration: Two-piece or one-piece anti-blowout stem design

• Shaft Sealing System: Multi-layered elastic energized PTFE packing

• Flow Performance: High flow capacity with minimal pressure drop

• External Coating: High-durability anti-corrosion epoxy painting for body protection

• Operation Position: Visual mechanical position indicator on the gearbox

• Inspection Protocol: Extensively hydrostatically and spark tested according to API 598 standards