DN20~DN400 ZL-4M self-operated flow control valve

ZL-4M (ZL47F) series of self-operated flow control valve hydraulic condition is a constant flow balancing valves. According to the requirements set flow rate, and maintain a constant flow through the valve. Used in centralized heating, central air conditioning and water systems, regulating the flow of the pipe network once, and tune network into a simple flow distribution. Eliminating the heat source switch, the flow re-allocate work to solve pipe network hydraulic imbalance.    Performance and characteristics
1, according to the design or the practical requirements set flow rate, and can automatically eliminate the system of differential pressure fluctuation, and keep the flow constant.
2, to overcome the system Enthusiasm, and improve the heating (cooling) quality.
A thorough solution to the proximal pressure large, remote differential pressure the small contradictions.
4, reducing the system of circulating water, to reduce the resistance of the system.
5, to reduce the design effort and does not require cumbersome hydraulic balance calculation on the pipeline network.
6, the pipe network layout is simple, do not need to use the same program layout, reduce the cost of the pipe network, reduce maintenance costs.
7, to reduce the difficulty of the tone network, complex modulation network changes in the work for a simple traffic allocation.
8, exempt from the heat source switch of the multi-sources of heat pipe network flow redistribution.
9, with the opening lock function.
10, the whole circle of flow values are test values.
11, using advanced technology to the diaphragm, the theoretical error is zero. And can withstand a differential pressure of 0.8 MPa.   Technical parameters                                     1.Nominal pressure:   1.6mpa                                    2.Medium temperature: 0-150°C                                        3.Working pressure range 0.02-0.4mpa (2-40mh o);                                      4 The length of the structure is in accord with GB/T12221 globe valve size.         5.Flow relative error ≤ ± 5%                                         6.Installation site: water supply line                                                                               Body/Cover: Cast Iron                                        Internal components: Brass and stainless steel                                     Coil spring:Stainless steel                                          Diaphragm: EPDM