Coliter®’s centerline butterfly valves, led by the D341X flanged model, provide reliable, economical flow control in water treatment, HVAC, fire protection, and general industrial pipelines. Featuring a centered disc design with EPDM or NBR rubber lining bonded to ductile iron or cast iron bodies, these valves ensure bubble-tight shut-off (Class VI leakage per GB/T 12238) with low operating torque. Available in DN50–DN1200 sizes with PN10/PN16 (1.0–1.6 MPa) flanged ends (per ISO 7005/GB/T 17241.6), they operate at temperatures up to 80–120°C depending on seal material. Ideal for applications requiring full-port flow, simple maintenance, and cost-effective isolation—commonly used in municipal water networks, cooling towers, and building services.
