Single Flange Butterfly Valve - Durable & Efficient Flow Control

The single flange butterfly valve is a compact, cost‑effective flow control device featuring one integrally cast flange on the valve body, with the opposite end designed as a wafer/lug type for clamping between pipeline flanges. It combines the space‑saving advantage of wafer valves with the stable connection of flange valves, ideal for low‑to‑medium pressure systems (PN10/PN16, Class 150) and space‑constrained installations.
Constructed from ductile iron, cast iron or stainless steel, it uses a 90° rotating disc to regulate or isolate fluid flow (water, wastewater, HVAC, mild chemicals). The soft‑seat design (EPDM/NBR/PTFE) ensures bubble‑tight sealing (ANSI Class VI), while the single‑flange structure enables easy installation and maintenance with fewer bolts.
Lightweight and shorter in face‑to‑face length than double‑flange models, it is widely used in water treatment, HVAC, power and general industrial pipelines, especially for end‑of‑line applications where cost and space efficiency are critical.