Product Overview: 
 ZY47 series of self-pressure control valve is a hydraulic condition a constant differential pressure balance valve, used in centralized heating, central air conditioning and water systems, was charged with the autonomic regulation of the system users and devices at the end of , especially for household metering heating system and variable flow air-conditioning system. 
 Structure and characteristics: 
 ZY47 type of self-operated pressure control valve body is a combination of dual channel resistance can change the flow of automatic control valve and made of two separate chambers separated by the diaphragm controller, the same side of the chamber and the return pipe. Installed in the return pipe. Channel automatic control valve actuators, the driving force of its action from the differential pressure changes in water pressure between P1 and backwater pressure P2. Differential pressure controller is a comparator, the pressure value is charged with the resistance of the heating system selected, the spring reaction force in the backwater side to the pressure difference between the balance of water supply and return. When charged with the heating system of the user to adjust the room temperature. Increase or decrease of the resistance will cause the circulation flow rate changes, up to the pressure balance of the diaphragm on both sides of the internal automatic adjustment of the controlled system. 
 Installation Instructions: 
 As far as possible the same path selection, when the flow is too low to consider reducing selection. Control pressure valve guide pipe connection thread 1/2, Pressure tube length 5m. Connection of water supply pipe. The valve is divided into fixed differential pressure type and the two adjustable differential pressure. Nominal pressure: 1 6Mpa medium temperature O-120 ° C