The D71X-16Q manual wafer-type butterfly valve is a lightweight and efficient flow control device designed for on/off service and moderate flow regulation in industrial piping systems. The valve body is cast from ductile iron (QT450), featuring a dense microstructure with excellent tensile strength, ductility, and impact resistance. This material combination ensures structural reliability under frequent operation and long-term service within standard pressure ratings.

The valve adopts a concentric disc design, where the disc rotates around the stem axis to vary the flow area. A small operating angle enables quick response, and when fully open, the streamlined passage minimizes pressure loss, contributing to efficient system performance. The resilient sealing system works in close contact with the disc, providing dependable sealing in water service and other neutral media, while also reducing operating torque for smoother handling.

The wafer-type configuration allows the valve to be installed directly between two flanges without additional supports. Its compact structure, low weight, and minimal space requirement make it particularly suitable for installations with limited layout space or dense piping arrangements. Manual actuation offers direct transmission, simple construction, and convenient field maintenance, resulting in low operating costs.

This butterfly valve is extensively used in water supply and drainage systems, HVAC circulation networks, fire protection pipelines, industrial cooling water systems, and general low-corrosion media lines, delivering reliable shutoff performance combined with cost efficiency and installation flexibility.