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      hydrotechnik
      
    
    
      
  
      
  
      
    
      
    
      
      
      
        
      
          
          
      GFM for high-temperature applications
      		
        
      
        
      
          hydrotechnik
        
      
        
      
          High-temperature GFM data download
        
      
        
      
          Advantages at a glance
        
      
        
      
          • high accuracy and repeatability
      
            • operational pressure up to 630 bar
      
            • fitting in any position and measuring in both flow
      
            directions possible
      
            • large measuring range up to 1:200
      
            • application for a large viscosity range
      
            • test points for pressure and temperature
      
            • suitable for hydraulic- and other oils on mineral oil basis,
      
            diesel oil, fats, glue, resins, waxes, pastes, polyurethane etc.
      
            • option: detection of flow direction and pulse doubling      		
        
      
        
      
          
      
            
      
              
      Qualities of hydrotechnik gear flow meters type GFM
      		
            
      
            
      
              Measuring principle
              displacement
            
      
            
      
              Viscosity range
              5 ... 500 mm²/s (cSt)
            
      
            
      
              Medium temperature
              -20 ... +160 °C
            
      
            
      
              Environmental temperature
              max. +50 °C (amplifi er)
            
      
            
      
              Storage temperature
              -20 ... +85 °C
            
      
            
      
              Output signal
              frequency 
            
      
            
      
              Supply voltage Ub
              12 ... 30VDC
            
      
            
      
              Electrical measuring connector
              4 pole device connector, M12 x 1
            
      
            
      
              Protection type (EN 60529 / IEC 529)
              IP 64
            
      
            
      
              Tightening torque
              8 Nm (± 2 Nm)
            
      
            
      
              Calibration viscosity
              30 mm²/s (cSt)
            
      
            
      
              Material casing cover
              1.4305
            
      
            
      
              Material middle / bottom part
              0.7060
            
      
            
      
              Material sealings
              FKM
            
      
            
      
              Material gear wheels
              1.7131
            
      
            
      
              Suitable measuring cable
              customer-specific
            
      
          
      		
        
      
        
      
          
      
            
      
              Pin assignment
              frequency
              
      
            
      
              
              Pin 1 = + Ub
              
      
            
      
              Pin 2 = signal
              
      
            
      
              Pin 3 = – Ub / GND
              
      
            
      
              Pin 4 = free
            
      
          
      		
        
      
        
      
          
      		
        
      
        
      
          
      
            
      
              Measuring
      
                range      		
              Nonlinearity
              Geometric gear
      
                volume      		
              Allowed working
      
                pressure      		
              Impulses
      
                per liter      		
              Hydraulic connector
              Error limit*
            
      
            
      
              l/min
              of measured value
              cm³
              bar
              MPa
               
               
              of current value
            
      
            
      
              0.2 ...30.0
              ± 0.5 %
              0.609
              630
              63
              1,640
              ISO 228-G3/8
              ± 0.5 %
            
      
            
      
              0.7 ...70.0
              ± 0.4 %
              2.222
              420
              42
              450
              ISO 228-G3/4
              ± 0.4 %
            
      
          
      		
        
      
        
      
          
      Hydrotechnik Orders of type GFM:
      		
        
      
        
      
          
      
            
      
              Measuring range
              GFM系
              Order number / weight
            
      
            
      
              l/min
               
              QG 100 (frequency)
              
      
            
      
               
               
              Order number
              weight
              
      
            
      
              0.2 ...30.0
              GFM-30
              3189-03-35.030
              3,700 g
              
      
            
      
              0.7 ...70.0
              GFM-70
              3189-04-35.030 
              8,600 g
              
      
          
      		
        
      
        
      
          *: for QG 100 and factory calibrated viscosity
      
            **: casing material AlCuMgPb F37
      
            ***: for QG 110 additional ± 0.2 % of fi nal value (error of f/I-converter)
      
            Factory standard calibration for mineral oil at 30 cSt. Other calibration viscosity optional.      		
        
      
      
      
    
      
  
      
  
 
  

      



      

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