丹富斯電動旁通壓差控制閥（旁通壓差閥）不需任何外來動力，依靠管網自身的壓力工作，保持閥門兩端的壓差相對恒定，廣泛用于*空調集分水器之間，熱力泵供回水之間。可有效保持設備不被損壞。可以代替電動旁通壓差閥。
性能及特點 電動壓差旁通閥/電動壓差旁通閥型號
1.恒定閥門兩端及被控系統壓差支持用戶系統變流量運行；
2.依靠壓差自動工作無須外界動力；
3.可以直接顯示控制壓差；
4.可以直接設定控制壓差；
5.控制壓差調節靈敏，操作簡單；
6.介質溫度：0-150℃;
7.控制壓差可調范圍：0.05-0.6MPa；
8.控制壓差誤差≤±5%。
選型
可根據管道等徑選用，用于旁通安裝時可縮徑使用。
丹富斯電動壓差旁通閥用途： 電動壓差旁通閥/電動壓差旁通閥型號
1.常閉型旁通壓差控制閥用于燃油、燃氣熱源供、回水管，*空調的分、集水器之間，作為一次測定流量，二次側變流量系統的旁通安裝，可有效保護燃油、燃氣機組不會因流量過小導致的溫度過高而損壞，也可有效的保護冷水機組因流量過小而造成的局部凍結而損壞。
2.常開型旁通壓差控制閥用于高度差較大且熱源在高區的集中供熱系統，使用時按高度差設定該閥的壓差，并在低區回水管適當位置安裝減壓泵、止回閥，調節閥組成的回水減壓裝置，通過調節閥來調節并設定回水管壓力，這樣既可保護高區用戶不會出現倒空現象，又可保護低區設備不會因壓力過高而損壞。
電動壓差旁通閥控制的作用： 本系統適用于*空調的冷凍水/熱水系統的壓差旁通控制用途。 產品特點： ★執行器選用鑄鋁支架及塑料外殼，體積小、重量輕 ★選用永磁同步電機，并帶有磁滯離合機構，具有可靠的自我保護功能 ★-適合多種控制信號：增量（浮點）、電壓（0～10V）、電流（4～20mA） ★-具有0～10V或4～20mA反饋信號（選配） ★傳動齒輪采用金屬齒輪，大大提高了驅動器的使用壽命 ★功耗低、輸出力大、噪音小 工作原理： 壓差控制器DPC-1通過檢測供/回水主管的壓力差，與設定值相比較，通過控制電動兩通閥的開度，使供水與回水間實現旁通，以保持所需的壓力差值。 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.
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