Principle Of Operation - Tuthill Fill-Rite TN700 Serie Manual De Instalación, Operación Y Seguridad Del Propietario

All positive displacement flow meters utilize either
rotors or vanes to separate meter inlet & outlet. These
rotors/vanes divide the liquid stream into clearly defined
segments, which can be counted.
The nutating disc metering principle is based on a
'wobble plate' rotor with a ball in the center, and a drive
shaft at 90° centered in the ball. As liquid is pushed
through the measuring chamber, the plate wobbles on
the center, turning the drive shaft in a circular motion.
This motion is used to either drive a mechanical
register, or turn a magnet under the pulse pick-up in the
electronic version of the flow meter.
Nutating disc meters are sensitive to viscosity changes.
Each meter is factory calibrated for operation in a
specific viscosity range.
Operating Conditions, Fluid Compatibility & Pressure/Temperature
Operating the flow meter in excess of its maximum design capacity, can cause excessive wear or premature failure.
In many cases it is necessary to consider all operating conditions in combination. In addition to liquid, pressure & flow
rate, correct material/seal selection often depends upon % concentration, pH value & operating temperature.
If in doubt about compatibility of a specific fluid, please refer to the Chemical Compatibility List, or consult with Customer
Care to verify compatibility of chemicals with the wetted materials.
The flow meter should not be operated in excess of pressure rating. Care should be taken to eliminate the possibility of
thermal or hydraulic shock conditions.
At elevated temperatures (> 120°F = 50°C), meter pressure rating is reduced. Please consult with Customer Service for
pressure rating at higher operating temperatures.
All TN700 & TN800 Series models are factory calibrated for service on liquids with viscosity within a specific
range. To use a flow meter on a another liquid with different viscosity characteristics, will typically require a
different set of gears in the ratio gear plate, plus calibration.
SAFETY INSTRUCTIONS
Make sure that all necessary safety precautions have been taken. Wear proper clothing, personal safety equipment and
prepare fire safety equipment if required. Before Start-Up of the flow meter, make certain that:
1 The flow meter is properly mounted, secured and piped. See Installation Instructions.
2 All connections are tight.
All bleed and drain valves are closed.
3
Do NOT smoke near the flow meter, or use the flow meter, near an open flame when metering flammable liquids.
4
Fire or Explosion could result.
This flow meter is not intended for use in systems requiring 3A sanitary equipment.
5

Principle of Operation

Installation & Operation
SAFETY INSTRUCTIONS
2
SAFETY INSTRUCTIONS