4" BFV - Barestem

4" Butterfly Valve – Barestem, Lug Type

The 4" BFV Barestem is the entry point into Kingrey's butterfly valve lineup — compact, reliable, and built for precision flow control in smaller-diameter pipelines. Its lug-style body allows installation with threaded bolt holes, supporting dead-end service where one side of the line can be removed without draining the whole system. The barestem configuration makes it a natural fit for manual or automated operation.

Key Features

• Size: 4 inches (DN100)
• Type: Lug-style butterfly valve, barestem
• Disc Material: Ductile iron
• Seat Material: EPDM (suitable for water, HVAC, and general service)
• Pressure Rating: Up to 150 PSI
• Temperature Range: -20°F to 250°F (-29°C to 121°C)
• End Connection: Lug (threaded bolt holes, fits ANSI Class 125/150 flanges, supports dead-end service)

Applications

Perfect for residential and light commercial HVAC, irrigation systems, water supply lines, and compact industrial process applications. The 4" size is a go-to for tight spaces where reliable shutoff is critical.