Liquid turbine flowmeterIt is a high-precision flow measurement instrument based on the principle of speed, widely used in industries such as petroleum, chemical, water, food and medicine. Its core characteristics can be summarized into five aspects: high precision, wide range, strong adaptability, intelligence, and easy maintenance, as follows:
1、 High precision measurement: core performance advantages
Accuracy level**
The precision of conventional models can reach ± 0.25% R to ± 0.5% R (R is the range), while high-precision models can reach ± 0.15% R, with short-term repeatability of 0.05% R to 0.2% R, meeting high-precision requirements such as trade settlement and process control.
Example: In the oilfield water injection system, its accuracy can ensure that the error per thousand cubic meters of water does not exceed ± 0.5 cubic meters, far superior to traditional mechanical flow meters.
Excellent linearity
Liquid turbine flowmeterThe turbine speed is strictly linearly related to the fluid flow rate, and the output signal frequency is proportional to the flow rate, avoiding the accumulation of nonlinear errors and suitable for long-term stable operation.
2、 Wide range ratio: adaptable to large fluctuations in flow rate
Wide range of measurement
The maximum to minimum flow ratio (range ratio) is usually 6:1-10:1, and for large-diameter models (such as DN200 and above), it can reach 40:1, covering measurement needs from small flow to full pipe flow.
Application scenario: In the feed control of chemical reaction vessels, low flow (such as catalyst addition) and high flow (such as solvent injection) conditions can be monitored simultaneously.
Fast dynamic response
The turbine has low inertia and responds quickly to flow changes (time constant ≤ 0.1 seconds), making it suitable for pulse or fluctuation flow measurement, such as transient processes such as pump start stop and valve adjustment.
3、 Strong adaptability: compatible with multiple media and complex working conditions
Wide compatibility of media
Suitable for cleaning liquids that are non corrosive to stainless steel (1Cr18Ni9Ti, 2Cr13), corundum (Al ₂ O3), and hard alloys, including water, oil, organic solvents, liquid foods, etc.
Special medium treatment: Impurity containing liquids require the installation of a 20-60 mesh filter; High viscosity media (dynamic viscosity>5 × 10 ⁻⁶ m ²/s) need to be calibrated with real liquid before use.
Pressure resistant and explosion-proof design
High pressure resistance: The instrument housing does not require openings, and the maximum working pressure can reach 50MPa, meeting the requirements of high-pressure water injection in oil fields, deep-sea pipelines, and other scenarios.
Explosion proof structure: The integrated header adopts ExdIIBT6 explosion-proof grade, suitable for flammable and explosive environments such as natural gas and liquefied gas.
Temperature and pressure compensation
Intelligent instruments can set fixed pressure and temperature parameters for gas compensation, or achieve real-time compensation through external sensors to eliminate the impact of changes in medium properties on measurement accuracy.
4、 Intelligent functions: data integration and remote control
Multi parameter display and output
Display function: The integrated header supports multiple unit displays such as cubic meters, gallons, liters, etc., and has functions such as cumulative flow reset and instantaneous flow freezing.
Output signal: Provides pulse frequency output (proportional to flow rate), 4-20mA current output (supporting HART protocol), and RS-485 communication interface, which can be connected to control systems such as SCADA and DCS.
Self diagnosis and alarm function
Real time monitoring of parameters such as turbine speed, bearing wear, and signal strength, triggering alarms in case of abnormalities (such as flow rate exceeding limits or air traffic control detection), facilitating timely maintenance.
Example: In a food production line, if a sudden drop in flow rate is detected, the system can automatically shut down and sound an alarm to prevent product shortage or equipment idling.
Data storage and traceability
The built-in memory can record historical traffic data, calibration records, and fault logs, support USB export or remote retrieval, and meet audit tracking requirements.
5、 Maintainability: Reduce full lifecycle costs
modular design
Sensors, display instruments, signal converters and other components adopt standardized interfaces, which can quickly replace faulty modules and reduce downtime.
Example: If the turbine bearing is damaged, it can be replaced by simply removing the front cover of the sensor, without the need for a complete return to the factory for repair.
Online cleaning and calibration
The sensor supports pressure cleaning, which can remove internal impurities without stopping the flow; Some models are equipped with online calibration interfaces, which can be calibrated on-site using a portable calibrator.
Calibration cycle: Regular scenarios are calibrated every 12 months, while high-precision demand scenarios (such as trade settlement) are recommended to be calibrated every 6 months.
Long lifespan and low maintenance cost
Turbine bearings are made of hard alloy or ceramic materials, with strong wear resistance and a design life of ≥ 5 years; The magneto electric induction signal generation method without mechanical wear further extends the maintenance cycle.