Body of a RV ZJHN Mini-type Pneumatic Diaphragm Double-seat Control Valve is equipped with two valve seats; fluids flow ut from the upper sealing surface and lower sealing surface of a valve plug; the RV ZJHN Mini-type Pneumatic Diaphragm Double-seat Control Valve has a small unbalanced force, is a balancing structure, allows larger using pressure difference, is suitable for occasions with large pressure difference, big flow and not strict requirement on leakage volume, and can be broadly applied to the industrial sectors like oil, chemical industry, pharmacy, metallurgy, power station, etc, to control mediums like gas, liquid, stem, etc.