The ZSG 9 regulators are designed for set value differential pressure regulation and flow limiting in technological installation connected to the outlet or inlet of the valve. This type of regulator can be applied in central heating systems and in indrustrial processes, for regulation of the flow of cold or hot water up to 150 °C, or of incombustible gases up to 80 °C.

• pressure difference control with flow limitation in installation that is connected in series to the controller.(housing on the supply or return side)  
• high control accuracy,
• single ported with the pressure balanced plug,
• large diversity of connectors; easy mounting,
• wide range of choice of flow coefficients K _vs',
• protection against hydraulic overloads,
• inner and outer tightness warranted,
• noiseless operation,
• high durability.