This is a self contained water circulating unit for studying the friction losses in pipes, pipe fittings, and valves ; and to determine coefficients of discharge for primary flow measuring devices at various flow rates.

The unit consists of a pump, a storage tank and a water proof panel on which all friction loss components and the flow measuring devices are arranged.

Friction loss is measured by a pressure drop and coefficient of discharge is determined from a pressure drop and a flow rate. Flow rate is obtained from a water meter and a stop watch. The pressure drop is measured by differential pressure using manometers. Pressure tapping  is by small ball valves with quick connection. All pressure taps are connected by flexible hoses to a set of specially arranged manifolds such that differential pressure across any component can be measured simply by opening valves without removing the hoses. The unit is on stainless steel frame on wheels.

  • Friction losses in straight pipes at various flow rates.
  • Friction losses in pipe fittings, valves, sudden expansion and contraction at various flow rates.
  • Friction losses in primary flow measuring devices and comparison of coefficients of discharge at various flow rates.
Primary flow measuring devices made from clear plastics      
. Venturi meter, orifice meter, Pitot tube.        
Friction loss components            
. Linear pipes, PVC  :  3 different diameters.      
. Linear pipe, stainless steel   :   1/4 in          
. Valves :  Gate, globe, ball, and check      
. Short radius bends :  2 ea          
. Long radius bends :  2 ea          
. Regular elbow :  1 ea          
. 45o elbows :  2 ea          
. 45o Y :  1 ea          
. Other components

:  Tee section, inline strainer, sudden expansion

   and sudden contraction

Measuring instruments            
. Water meter.          
. Water manometer            
. Differential pressure gauge          
Power supply :  220 V, 1 Ph, 50 Hz. Other power supply is available on request.
Net (unpacked) shipping dimensions WxLxH :  90 x 245 x 105 cm    
Net weight                                                                :  Approx. 160 kg        
  • ISA nozzle.
  • Polyethylene Polybutylene or ABS
  • Galvanized steel pipe
  • Artificially roughened pipe
  • Annular pipe.
  • Differential pressure digital display instead of mercury manometer.
  • Mercury manometer instead of differential pressure gauge.
  • HF 135-050 Computer Interface.
  • HF135S Learning software for HF125 and HF135
  • Other pipes and fittings can be supplied on request.