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Primary Flowpoints Ltd
Charles Street
Walsall
WS2 9LZ
Tel 01922 650009
Tel +44 1922 650009
Fax 01922 640326
sales@flowpoints.co.uk
LOWFLO FLOWMETER 
The Lowflo uses
the Pelton wheel principle to measure the extremely low flow rates required in
laboratories, research establishments and process plants. It will cover flow
ranges from 1 to 420 litres/hour.
High accuracy and
repeatability
Well proven and long life bearings
Easily maintained
Access the internals without removing
the body from the line
Robust
stainless steel construction
Withstands high pressure and temperature
ATEX intrinsic safety approval
Individual calibration
certificate
Application
The Lowflo flowmeter is used to measure the extremely
low flow rates of clean liquids, chemicals, additives, demineralised water, oil
and fats. Applications include dosing of chemicals, injection in to food and
animal feeds processes, batching, blending, monitoring and pH
adjustment.
Instrumentation
The output frequency is fed into an instrument and can be
used for flow rate indication, totalising, blending, dosing, controlling and
batching. The flowmeter can be used in hazardous areas. Apollo provide a range
of instruments to suit your application.
Principle of Operation
The PVDF or PFA Pelton wheel rotor has steel rods
embedded within the tips of the vanes. Tungsten carbide balls are mounted into
the rotor. The rotor and tungsten balls spin in sapphire cups mounted in s/s
bearing housings. The flow of liquid causes the rotor to turn and a proximity
sensor detects the passing of the rotor tips. The speed of the rotor and the
frequency of the signal is directly proportional to the flow
rate.
Construction
The Lowflo has a strong stainless steel body that is
corrosion resistant and withstands high pressures. The flowmeter is designed
for use on clean liquids although particles up to 200 micrometres can be
entrained in the liquid without any effect on the overall performance. The two
wire Namur sensor is fitted into the headcap of the flowmeter and is supplied
with a 2 metre length of cable for connection to remote
instruments.
Calibration
All Lowflo flowmeters are individually calibrated with
water and are traceable to national standards.We provide you with a test
certificate for each meter showing the number of pulses per litre, which is
used to set the instrumentation.
Intrinsically Safe Version
The flowmeter can be used in Intrinsically Safe
areas. The sensor is certified to ATEX II I G EEx ia IIC T6.
Installation
To get the best results from your flowmeter it should be
mounted into the pipework with its sensor lying horizontally. The flowmeter
should be maintained full of liquid prior to and throughout
measurement.
RN3 Flow Ranges
| Flow range: | Linearity: | Nominal pulses/litre: |
| 1-10 litres/hour | +/- 1% of reading | 7000 |
| 1-25 litres/hour | +/- 1% of reading | 5500 |
| 3-60 litres/hour | +/- 1% of reading | 2750 |
| 5-150 litres/hour | +/- 1% of reading | 1850 |
| 10-250 litres/hour | +/- 1% of max. reading | 1000 |
| 20-350 litres/hour | +/- 1% of max. reading | 1050 |
| 30-420 litres/hour | +/- 1% of max. reading | 1050 |
Specification
| Maximum working pressure: | 69 bar |
| Body connections: | ¼” BSP internal |
| Maximum temp: | 100oC |
| Maximum viscosity: | 70 centipoise |
| Repeatability: | +/- 0.2% reading |
Materials of Construction
| Body ,cartridge and jet | 316 Stainless Steel |
| Headcap | 316 Stainless Steel |
| Rotor | PFA or PVDF with sealed ferrites |
| Bearings | Tungsten carbide balls. Synthetic sapphire cups |
| Gasket | Mica |
Sensor Specification
| Type: | Namur |
| Power supply: | 8VDC |
| Max. temp: | 100oC |
| Output current pulse | High level > 3 mA |
| Low level < 1 mA |
To see available data sheets and manuals click here: Download Area
Click below to switch to the following
flowmeters:
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| Electromagnetic | Hoverflo |
Lowflo/Peltflo | Variable Area |
Oval Gear PD | Positive
Displacement | Mass | Water
Meter | Ultrasonic | Custom