RV 3000 pneumatic diaphragm control valve is top guide structure type. Valve structure is compact and an  S-stramlined channel is available to realize small pressure drop loss, high flow, wide adjustable rang and high flow characteristic accuracy, Conforms to IEC5534-1-1976 standard. The weight and height of the valve reduce by 30%. The valve is applicable to clean medium places with small working pressure difference and relatively strict leakage requirement. The leakage rate of the control valve conforms to ANSI B16,104 standard.