SI-3202 Liquid Turbine Flow Meter

Liquid turbine flow meters utilize the mechanical energy of liquids to rotate a rotor within the fluid, measuring the rotational speed and thus the fluid flow rate. They are suitable for measuring the volumetric flow of low-viscosity liquids in closed pipes, such as water, diesel, hydrocarbons, and chemicals.

Sino-Inst’s liquid turbine flow meters utilize proven flow measurement technology and cover pipe diameters from DN2 ~ DN300. Easy to maintain and durable, these liquid turbine flow meters are a reliable and cost-effective option for high-precision flow measurement.

RFQ

Features

Specifications

Flow Range

Order Guide

In addition to regular products, we support customization

SI-3202  DN50  E2  10   S  S4  BT  D16  T2

①   ②  ③  ④  ⑤  ⑥  ⑦  ⑧

• ① Diameter: DN50
• ② E2：24VDC，Pulse and 4-20mA output，RS485，Digital display，EX
• ③ 10：1.0% of rate accuracy
• ④ S: Standard range 4-40m³/h
• ⑤ S4：SS304 Body Material
• ⑥ BT: Exd II BT6
• ⑦ D16：Flange DIN PN16
• ⑧ T2：-20～+120℃

Liquid Flow Measurement

Turbine flowmeters are a type of velocity-based flowmeter with a moderate cost and are ideal for medium- and stable-velocity, clean, and low-viscosity fluids. They are used in the water, petroleum, and chemical industries. Water applications include distribution systems within and between water zones. Petroleum applications include custody transfer of hydrocarbons. Other applications can be found in the food and beverage and chemical industries.

1. Only for single-phase fluids with low to medium viscosities:

Practical application and calibration have shown that when measuring low-viscosity fluids, the instrument factor of turbine flowmeters remains virtually unchanged with flow rate. However, as the viscosity of the measured fluid increases, the linearity of the turbine flowmeter deteriorates. The instrument factor also varies significantly with flow rate, making it difficult to achieve the desired measurement accuracy.

When measuring gas-liquid two-phase flow, the flow rate becomes highly unstable, resulting in significant measurement errors.

2. The fluid being measured by a turbine flowmeter should be in a turbulent state:

According to the flow characteristics of a turbine flowmeter, the meter coefficient varies significantly with flow rate when the medium is in laminar flow, while the meter coefficient hardly changes with flow rate when the medium is in turbulent flow. To ensure the measurement accuracy of a turbine flowmeter, the measured medium should be in a turbulent state.

3. Generally only used to measure media with high cleanliness requirements:

Most turbine flowmeters use spherical bearings, which place high demands on the cleanliness of the measured medium. Particulate matter in the medium will cause rapid bearing wear. Fiber matter can become entangled in the turbine blades, affecting proper rotation. In practical applications, an effective filter should be installed upstream of the turbine flowmeter.

Specific Applicable Media:

• Clean Liquids: Water, Beverages (Juice, Beer, Alcoholic Beverages), Dairy Products, etc.
• Petrochemical Media: Gasoline, Diesel Oil, Lubricating Oil, Hydraulic Oil, Liquefied Gas, etc.
• Chemical Solutions: Ammonia, Methanol, Brine, etc. ‌Organic/inorganic liquids‌: alcohol, ether, benzene, formaldehyde, etc. ‌

Technical Support

Here to :

• Technology Guide to Turbine Flow Meters 
• Technology Guide to Magnetic Flow Meters
• Technology Guide to Vortex Flow Meters

What is a turbine flow transmitter?

A turbine flow transmitter is a sensor device that measures fluid flow rate by detecting the rotation of turbine blades within the fluid. As fluid passes through a pipeline, the turbine blades are pushed by the fluid, causing them to rotate, generating a frequency signal. By counting and processing this signal, the flow rate can be determined.

A turbine flow transmitter typically consists of a sensor and a signal processing unit, capable of accurately measuring the flow rate of various media.

A turbine flow transmitter converts the flow signal into a local digital display and outputs a signal. It supports pulse, 4-20mA, and RS485 communication, making it convenient for remote flow monitoring.

Turbine flow meter k factor

There are two different manufacturers k:
one is k = f / Q, which is the number of vortices generated per unit flow;
the other is k = Q / f, which is the flow corresponding to each vortex.
The k value is calibrated by the factory water.
The number of vortices of the sensor measuring instrument is compared with the volume flow measured by the calibration device to obtain the k value.

The value of k is actually related to the mechanical structure inside the measuring tube of the flow meter.
Take k = f / Q as an example, the formula is as follows:

Where

• D —- Measuring tube diameter
• St —- Strauhal number, constant in a certain range of Reynolds number
• d —- characteristic width of vortex generator
• m–the ratio of the arcuate area on both sides of the vortex generator to the cross-sectional area inside the pipe

The values of d and m are difficult to measure accurately, so it is difficult to obtain accurate k values by calculation.

Turbine flow meter advantages and disadvantages

Turbine Meter Advantages	Turbine Meter Disadvantages
Wide flow rangeability including low flow rates	Requires constant backpressure to prevent cavitation
Turndown ratio is up to 35:1	Accuracy adversely affected by bubbles in liquids
Good level of accuracy at an economic price	Turbine meters can be used with clean liquids and gases only
Simple, durable construction	Not applicable for measuring corrosive fluids
Easy to install and maintain	Requires a turbulent flow profile (consistent fluid velocity across the pipe diameter) for accuracy
Flexible connection to flow instruments for flow control	Sensitive to changes in fluid viscosity
Wide variety of process connections	Require a straight run of pipe before and after the turbine meter to allow swirl patterns in the flow stream to dissipate
Turbine meters can operate over a wide range of temperatures and pressures
Low pressure drop across the turbine	May not function properly with high viscosity fluids where the flow profile is laminar
Provides a convenient signal output

Sanitary Flow Meter

Sanitary Flow Meter, also called the tri-clamp flow meter. Sanitary Flow Meters have stainless steel bodies and come standard with Tri-Clover fittings. Sanitary flow meter meets the requirements of the food, and beverage company industries. Sino-Inst’s magnetic flowmeter and turbine flow meters is available in a sanitary version. And allows for use with Output Modules, Sensors and Remote Transmitters.

Turbine type flow meter

Turbine type flow meter is one type of mechanical flow meters. Turbine flow meter use the mechanical energy of the liquid to rotate a rotor in the flow stream. Turbine flow meters measure the velocity of a variety of liquids (oil, water), gases (natural gas) and vapors. All types turbine flow meters, like: flange, sanitary flow meter, insertion, threaded connections etc. .

Water Flow Meter Types

Water Flow Meters are flow meters measure and show the flow rate of water flow. Water flow measurement is important for inductrial applications, like the wastewater treatment. In principle, water flow meter types are: Electromagnetic (magnetic), Turbine, Ultrasonic, and DP. Coriolis and Oval Gear flow meters can also work for water flow measurement. These water flow meters, optional with digital display, battery, analog or pulse output. Material can be 316 stainless steel or special material.

Wastewater flow meter

Wastewater Flow meters are flowmeters for water and wastewater treatment. Electromagnetic flow meters are suitable for open channel and underground industrial water pipes. Magnetic flow meters can be Remote type, compact type, insertion type. And ultrasonic flow meters are another choice, if you can not change your pipes. Both ultrasonic flow meters and magmeters are inline flow meters. Sino-Inst offers ultrasonic and magnetic flow meters, which offer the highest flow meter accuracy and reliability, as well as long-term stability and a low cost-of-ownership.

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The Sino-Inst liquid turbine flowmeter features a simple, lightweight structure, high accuracy, excellent reproducibility, and sensitive response. It is widely used to measure liquids in closed pipelines that are less corrosive and free of impurities such as fibers and particles. At operating temperature, it can be used directly with liquids with a kinematic viscosity less than 5×10-6 m2/s. For liquids with a kinematic viscosity greater than 5×10-6 m2/s, the flowmeter can be calibrated with actual liquids before use.

Sino-Inst’s liquid turbine flowmeters can also be paired with display instruments with specialized functions. They can also provide quantitative control and over-flow alarms, making them ideal instruments for flow measurement and energy conservation. If you require a liquid turbine flowmeter or have any technical questions, please feel free to contact us!