Self-Operate Differential Pressure Control Valve

Self-operate differential pressure control valve
ZY47 Series Self pressure control valve is a do not rely on external power to maintain the constant pressure of the control
  system balancing valves of the hydraulic condition, the sub-water supply (G) and the return type (H) two, with in the urban heating (air conditioning), water systems,maintaining the controlled system (a district, a building, a single unit, a user, a device ......) differential pressure setpoint, especially the self-regulating, compartment temperature control, variable flow rate of household metering system.


Features
Dual valve structure of the valve stem unbalanced force is small, compact structure, used for heating water systems (air conditioning), a constant differential pressure of the controlled system, and has the following features:
1, charged with a constant system pressure;
2, support charged within the system self-regulating; rule out the differential pressure fluctuations in the external network controlled system;
3, the use of advanced technology diaphragm, the theoretical error is zero, and can withstand 0.8MPa pressure differential;
4, the use of advanced stepless voltage regulation structure, adjustable control differential pressure ratio up to 25:1;

Technical parameters
1, nominal pressure of 1.6MPa (2.5 MPa scheduled);
2, medium temperature 0 ~ 120 ° C;
3, the working pressure range 0.04 to 0.4 MPa;
4, the length of the structure in line with the preferred size GB/T12221 the length of the structure of the "cut-off valve and check valve.
5, flange dimensions conform to the GB4216-84 in gray cast iron flange dimensions.