The pneumatic tank bottom control valve is a special structural type of single-seat control valve. Its Y-shaped body features a smooth flow path, high flow capacity, and low pressure drop. The seat leakage meets ANSI BIG.104 standards. Equipped with a ZHA/B multi-spring diaphragm actuator, it boasts a compact base structure and high output force. This valve is particularly suitable for controlling fluids prone to sedimentation or containing particles.