Runxin N77B1 - Operating Conditions and Requirements

MODEL: 63518-N77A1 /63618-N77A3/ 53518-N77B1
5
1.3. Service Condition
Runxin Valve should be used under the below conditions:
Items
Requirement
Working
conditions
Water pressure
0.2MPa～0.6MPa
Water temperature
5℃～50℃
Working
environment
Environment
temperature
5℃～50℃
Relative humidity
≤95%（25℃）
Electrical facility
AC100～240V/50～60Hz
Inlet water
quality
Water turbidity
Softener(N77A)＜5FTU；
Filter(N77B)＜20FTU
Water hardness
First Grade Na
+
＜6.5mmol/L；
Second Grade Na
+
＜10mmol/L
Free chlorine
＜0.1mg/L
Iron
2+
＜0.3mg/L
CODMn
＜2mg/L (O
2
)
In the above table, First Grade Na+ represents First Grade Na+
Exchanger. Second Grade Na+ represents Second Grade Na+
Exchanger.
 When the water turbidity exceeds the conditions, a filter should be
installed on the inlet of control valve.
 When the water hardness exceeds the conditions, the outlet water
hardness will hardly reach the requirement of boiler feed water（0.03
mmol/L）. It is suggested to adopt second grade softener.