N / NH Series
The Truck-Mounted Fire Pump with Global Experience
 
Combined Normal and High-Pressure Pump, Type "NH" – Everything at the Same Time
 
The NH series pumps combine all the benefits of the N series pump with those of a three-stage high-pressure centrifugal pump on a single pump shaft.
 
Customer benefits:
  • No additional drive required for high-pressure pump the normal and high-pressure pumps share a pump shaft
  • Maintenance-free thanks to complete integration of the high-pressure stage in the normal-pressure pump
  • Thrust load compensation thanks to counter-rotating design of normal and high-pressure impellers
  • No additional seals required despite high-pressure pump
  • HP can be engaged/disengaged at any speed thanks to switchover valve It is not the HP pump itself, but the water supply that is switched over
   
 

Switchover valve OPEN
Normal and / or high-pressure operation

Switchover valve CLOSED
Normal-pressure operation;
no water is supplied to high-pressure pump
   
Normal-Pressure Pumps Flat Pump Output Characteristic
 
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