GB/T 12224 Dome Valve

A GB/T 12224 dome valve is a heavy-duty, pressure-tight bulk material handling valve designed and manufactured according to Chinese standard GB/T 12224 (General requirements for steel valves), featuring a rotating spherical dome disc and an inflatable rubber seal ring. Engineered specifically for abrasive dry powder and bulk solids handling, the valve rotates open to allow full-bore material passage and, when closed, inflates its elastomer seal against the dome to achieve a 100% dust-tight, pressure-tight seal even through static columns of abrasive ash or mineral powders. Conforming to GB/T 12224 and industrial pneumatic conveying codes, these severe-service valves are primary specifications in coal-fired power plant fly ash systems, cement plants, and metallurgical powder transport, allowing materials handling engineers to secure leak-free powder isolation by importing certified GB/T 12224 dome valves directly from premier manufacturers in China via our advanced B2B commercial platform.