Turbine Flow Meter - Industrial
Contact parts are produced from 316 stainless steel,except rotors which must possess good magnetic qualities, and here 431 stainless is used or Ferralium alloy depending upon the corrosive properties of the liquid.
Standard end connections are screwed BSP parallel thread with included 30 degree internal cones to BS5200, Ermeto threads are also available.
Flanged meters are available with ANSI, DIN or BS standards
A unique feature of the design is the use of helically milled rotors cut from solid in sizes up to 65mm.
Bearing bushes are of PTFE/Carbon HY49 or similar, or tungsten carbide depending upon the nature of the metered fluid. In all cases, the spindle is of tungsten carbide with Cobalt binder, and thrust balls of tungsten carbide. Stainless steel ball races are used in the smaller sizes.
The electrical signal is a sinusoidal pulse of minimum height 50mV peak at lowest flowrate, rising to 800mV peak at max flowrate. For normal transmission distances pre-amplifiers are not essential since pulse shaping and conditioning are carried out in the appropriate electronic readout unit. In cases where heavy electrical noise is present or where transmission distances are over 500 metres, pre-amplifiers of standard or intrinsically safe design are available as head mounted weatherproof units and loop powered.
Advantages:
- Liquid and Gas versions
- Simple robust design
- Easy one-circlip dismantling
- Strong rotor design
- Long bearing life
- Suitable for conductive and non-conductive fluids
- Excellent repeatability for batching
- Wide variety of end fittings available including high-pressure 15,000 PSI
- Subsea versions
- Hazardous area versions
