水泵工作條件Working conditions for Pumps
安裝Installation
水泵安裝時必須保證電機軸保持水平。水泵啟動時，松開電機背部的放氣螺釘以便使泵內空氣順利排出。
短時間內，水泵轉子轉動驅使殘余的空氣經過軸心孔排出至系統中。
禁止水泵在缺水狀態下干轉運行。
The pump must always be installed with horizontal motor shaft. At start-up, the rotor cartridge need be vented by removing the plug in the top of the motor.
Within a short time, the rotor forces the remaining air out into the system via the shaft.
It is prohibited for pump dry running without water.
輸送介質Transferring liquids
德魯普DS系列屏蔽循環泵適用于以下液體：
l 潔凈，無腐蝕，非易爆液體；不含固體顆粒或纖維
l 最大含量50%的乙二醇水溶液
l 不含礦物油的冷卻液體
l 生活熱水
l 軟化水
液體中的任何添加物都不會對水泵功能造成影響。
若將該屏蔽循環泵用于輸送粘度較高的液體，則水泵的水力性能將有所降低，因此在選擇水泵時，應評估輸送液體的粘度對水泵水力性能的影響。
DS circulation pumps are suitable for the following liquids:
l clean, thin, non-aggressive and non-explosive liquids without solid particles or fibres
l Water with up tp to 50% glycol contents
l cooling liquids, not containing mineral oil
l domestic hot water
l softened water.
Any additives in the water must not influence the pump fuction.
If the circulator pump is used for a liquid with a higher viscosity, the hydraulic performance of the pump will be reduced. When selecting a pump, the viscosity of the pumped liquid must be taken into consideration.
溫度Ambient and liquid temperatures
輸送液體的溫度范圍為：-25℃至+110℃；
水泵工作時的環境溫度范圍為：0℃至+40℃
Temperarue range for transferring liquids: -25℃ to +110℃
Ambient temperature when pump running: 0℃ to +40℃
進口壓力Inlet pressure
為防止汽蝕產生噪音，并避免對水泵軸承造成損害，水泵進口處應維持以下最小進口壓力：
To avoid cavitation noise and damage to the pump bearings, the following minimum pressures are required at the pump suction port.
液體溫度
Liquid temperature
50℃
95℃
110℃
進口壓力
Inlet pressure
0.5m 揚程head
3.0m揚程head
10.0m揚程head
0.05bar
0.3bar
1.0bar