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| Introduction of turbine flowmeter |
| 2011-7-11 17:03:23 |
(1) The material of the turbine flowmeter body is generally 304 stainless steel, and 316 stainless steel can also be selected for corrosion protection. If it is an explosion-proof area, an explosion-proof turbine flowmeter should also be selected.
(2) Turbine flowmeter bearings generally have three specifications of tungsten carbide, polytetrafluoroethylene, and carbon graphite: tungsten carbide has the highest accuracy, which is used as a standard part for industrial control; polytetrafluoroethylene, carbon graphite can be anticorrosive, and is generally used in chemical industry. Place is given priority. The life of the bearing is proportional to the inverse square of the flow rate, so the best flow rate is better than 1/3 of the maximum flow rate.
(3) The turbine flowmeter induction probe detects the motion of the rotating impeller and converts it into a pulsed digital electrical signal. Its electromagnetic coil voltage output value is close to a sine curve. The frequency range of the pulse signal changes linearly with the measured flow rate. Typical The range is 10: 1, 25: 1 and 100: 1. The resistance of the electromagnetic coil is generally less than 2000Ω, and greater than this value may be damaged.