Selection and use of turbine flowmeters

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Precautions for using turbine flowmeters: Cleanliness: Thoroughly clean and purge the pipeline； Sufficiently precise filters must be used in the front section: proper media compatibility, matching of flow rate/pressure/temperature, adequate precision, compliant installation, explosion protection/appropriate materials/proper signals; high-viscosity, solid-containing, or two-phase flows should be avoided. Medium: Low-viscosity, clean liquids/gases such as steam, coal gas, diesel, methanol, natural gas, compressed air, nitrogen, etc. Not suitable for: high viscosity (>10 mPa・s), media containing particles, those prone to scaling, two-phase flow (gas-liquid), or pulsating flow; coke oven gas is not recommended. Temperature and pressure range: 60%~70% of normal operating conditions, with a range ratio of 10:1 to 20:1. Diameter and flow velocity: Liquids: 0.5~7 m/s; Gases: 3~30 m/s. If the instrument diameter differs from that of the pipeline, use a reducer; there should be straight sections of 10 units in front and 5 units behind the reducer. Regulators are generally standard equipment used by foreigners. Installation direction: Horizontal or vertically upward. Pre-use precautions: Open the valve slowly at first ； Overtravel that could damage the bearings is not allowed. Make sure the pipe in front of the front filter and the flow meter is clean, to prevent impurities such as weld slag from damaging the bearings ； Ensure proper drainage and venting to avoid two-phase flow. Precautions: Periodically check the filter differential pressure, and clean or replace the filter elements ； Apply lubricant monthly to lubricate the impeller ； Replace the battery annually