Coliter®’s double eccentric butterfly valves deliver superior sealing, longer service life, and reduced wear in high-pressure water, HVAC, fire protection, and industrial systems. The series includes the D342X double eccentric soft-sealing valve with EPDM/NBR lining for bubble-tight shut-off, and the SD(3/9)42X double eccentric telescopic type that combines expansion joint functionality with isolation—ideal for pipeline stress relief and pump station installations. Featuring a dual-offset disc design that minimizes seat friction during operation, these valves are available in ductile iron or stainless steel bodies with flanged ends (PN10/PN16, DN50–DN1200). Rated for temperatures up to 120°C (soft seal) or 200°C (metal seal options), they comply with GB/T 12238 and offer lower torque, extended seal life, and reliable performance in critical applications.
