电动压差旁通阀/电动压差旁通阀型号

电动压差旁通阀控制的作用：

    本系统适用于*空调的冷冻水/热水系统的压差旁通控制用途。
    压差旁通的作用主要在于，维持冷冻水/热水系统能够在末端负荷较低的情况下，保证冷冻机/热交换器等设备的正常运转。

产品特点：

　　★执行器选用铸铝支架及塑料外壳，体积小、重量轻

　　★选用永磁同步电机，并带有磁滞离合机构，具有可靠的自我保护功能

　　★-适合多种控制信号：增量（浮点）、电压（0～10V）、电流（4～20mA）

　　★-具有0～10V或4～20mA反馈信号（选配）

　　★传动齿轮采用金属齿轮，大大提高了驱动器的使用寿命

　　★功耗低、输出力大、噪音小

工作原理：　　压差控制器DPC-1通过检测供/回水主管的压力差，与设定值相比较，通过控制电动两通阀的开度，使供水与回水间实现旁通，以保持所需的压力差值。
压力差增大时，红触点与黄触点接通，压力减少时，红触点与蓝触点接通，红触点可以停留在中间位置，与其他触点没有电气连接。

Dan fuss electric bypass pressure difference control valve (pressure differential bypass valve) does not need any external power, relying on the network's own work pressure, differential pressure at the ends of the valve is relatively constant, is widely used in central air conditioning set between water segregator, heat pump for water. Can effectively keep the equipment is not damaged. Can replace electric bypass pressure differential valve.

Performance and characteristics of the

1. Constant on both ends of the valve and controlled system differential pressure support user system variable flow operation;

2. On differential pressure automatic work without external power;

3. Can directly display control pressure difference;

4. Can be directly set control pressure difference;

5. Controlling differential pressure regulating sensitivity, simple operation;

6. The medium temperature: 0-150 ℃;

7. General control pressure adjustable range: 0.05 to 0.6 MPa;

8. Control the differential error of plus or minus 5% or less.

The selection

According to pipe diameter selection, installation can be used to bypass reducing use.

USES:

1. Normally closed type by-pass differential pressure control valve is used for fuel, gas, heat supply and return pipe, central air conditioning, between points, Siamese as a measuring flow, secondary side bypass installation of variable flow system, which can effectively protect the fuel, gas units will not damage due to flow high temperature caused by too small, also is effective in protecting the chiller caused by traffic is too small and partial freezing damage.

2. Normally open type by-pass pressure difference control valve used in height difference is bigger and the heat source in the central heating system of high area, when used according to the difference in height setting of the valve pressure difference, and in the low return pipe position vacuum pump installation, check valve, regulating valve of backwater pressure-relief devices, through the control valve to regulate and set back to the pipe pressure, so that can protect high area users won't appear empty phenomenon, but also protect the equipment will not damaged by high pressure low area.

The role of electric differential pressure bypass valve control:

This system is the central air conditioning chilled water/hot water system of differential pressure bypass control purposes.

The effect of differential pressure bypass key lies in the fact that chilled water/hot water system can under the lower end of the load, ensure the refrigerator/heat exchanger and the normal operation.

Product features:

Taken the actuator selection aluminum bracket and plastic shell, small volume, light weight

U choose permanent magnet synchronous motor, with magnetic hysteresis clutch mechanism, has reliable self-protection function

U - suitable for a variety of control signal: increment (float), voltage (0 ~ 10 v), current (4 ~ 20 ma)

U - with 0 ~ 10 v or 4 ~ 20 ma feedback signal (optional)

U use a metal gear transmission gear, greatly improve the service life of the drive

U low power consumption, big output power, low noise

Working principle: by testing for differential pressure controller DPC - 1 / water head pressure difference, compared with the set value, by controlling the electric two-way valve opening, make to by-pass between water supply and return water, in order to maintain the required pressure difference.

Differential pressure increases, the red contact, connected with yellow contact pressure to reduce, the red contact with blue contacts connected, red contact can stay in the middle position, and other contact no electrical connections.