Cast Iron GG25 Butterfly Valve

A cast iron GG25 butterfly valve is an economical, lightweight quarter-turn rotary valve engineered for low-pressure, non-hazardous utility services such as commercial HVAC systems, agricultural irrigation, and potable water distribution. Cast from GG25 gray cast iron (equivalent to EN-GJL-250 or ASTM Class 35B), this valve body provides excellent vibration damping and structural rigidity at a highly competitive price point. Typically designed in a concentric wafer or lug profile, it incorporates a structural disc that seals tightly against a resilient EPDM or NBR elastomer liner to achieve a bubble-tight, zero-leakage shut-off. These low-maintenance valves are ideal for standard plumbing and water-handling applications, allowing mechanical contractors and building developers to secure dependable flow isolation by importing certified GG25 butterfly valves directly from leading manufacturers in China via our advanced B2B commercial platform.