Overview:

    intrinsically safe metal tube float flow meterThe (Metal Tube Rotameter) is a commonly used variable area flow measurement instrument in industrial automation process control. It features a compact size, wide measurement range, and ease of use. It is suitable for measuring the flow of liquids, gases, and steam, particularly for low flow rates and low volumes. Over the years, the metal tube float rotameter has been widely applied in industries such as petrochemicals, steel, power, metallurgy, light industry, food, pharmaceuticals, and water treatment, thanks to its excellent performance, reliability, and favorable performance-to-price ratio.

Flowmeter Type:

TF SeriesMetal Tube Float Flow MeterComposed of a measuring tube (sensor) and an indicator (electronic converter), various complete units can be assembled by selecting different types of measuring tubes and indicators to meet on-site requirements.

The TF series metal tube float flowmeters are divided into five types based on the direction of the fluid inlet and outlet: vertical type, horizontal type (including horizontal T-type and horizontal spring type), bottom inlet-side outlet type, side inlet-side outlet type, and side inlet-up outlet type. Each type further includes standard models, high-temperature models, jacketed models, etc.

For flow meters installed horizontally, use T-type structures when the diameter is less than or equal to DN50, and use spring structures when it is greater than DN50.

Flowmeter Connection Specifications: The TF series metal tube float flowmeter standard model adopts the GB/T9119-2000 flange standard, which can be customized according to customer requirements; both threaded and clamp connection methods are also available.

Indicator Selection:

Users can select on-site display, electrical remote transmission, intrinsically safe, explosion-proof, or HART protocol models based on actual site requirements. Detailed descriptions of the various indicators' functions are listed below.

Indicator Type

Instrument Function Description

M1 Model

Local pointer indicates flow rate; no power required; no 4-20mA remote transmission; optional flow alarm unit; scale can be set for instantaneous flow rate or percentage scale value.

M3 Model

Local digital display, battery-powered, no 4-20mA remote transmission, non-explosion proof. LCD shows instantaneous and accumulated flow rates; on-site buttons are used to view and modify related parameters. The battery can last for 6 months; replace the battery when the T character appears on the display (battery model: ER26500, 3.6V, 7.5Ah, -55℃~85℃).

M4 Model

Electrical remote transmission, inherently safe design, explosion-proof marking ExdⅡCT6, optional HART protocol function. Powered by DC24V, features on-site pointer indicating instantaneous flow and digital display for both instantaneous and cumulative flow. Two-wire system with 4-20mA output. The panel is equipped with 4 buttons for viewing and modifying internal parameters. Detailed usage instructions on page 18.

M5 model

Electrical remote transmission, explosion-proof design with ExdⅡCT6 explosion-proof marking, optional HART protocol functionality. Powered by DC24V,现场指针indicating instantaneous flow and digital display of instantaneous and accumulated flow. Two-wire system with 4~20mA output, featuring a panel with 4 buttons for viewing and modifying internal parameters.

Feature Highlights:

◆ Suitable for low-pressure and low-flow medium flow measurement ◆ Reliable performance, minimal maintenance required, long lifespan

◆ Not stringent requirements for straight pipe sections◆ Wide range ratio of 10:1

◆ Dual-line LCD display, showing instantaneous/accumulated flow rate on-site ◆ Keyboard on the indicator for easy operation and settings

◆ Full metal structure, suitable for high temperatures, high pressures, and strong corrosive media ◆ Non-contact magnetic coupling transmission

◆　Suitable for flammable and explosive hazardous environments ◆　Available in DC power or battery-powered options

◆ Data recovery, data backup, and power failure protection features ◆ Multi-parameter calibration function

Technical Specifications:

Flowmeter sizes: DN15, DN25, DN50, DN80, DN100, DN150 (other sizes upon consultation with the manufacturer)

Flow Range: Liquid: 1.0 ~ 150,000 liters/hour; Gas: 0.05 ~ 3,000 cubic meters/hour (see Flow Table on page 11 for detailed flow range)

Range Ratio: 10:1, 20:1 (Special)

Accuracy 1.5 Class, 1.0 Class (Special)

◆ Pressure Class: DN15, DN25, DN50: 4.0 MPa (max 20 MPa)

DN80, DN100, DN150: 1.6 MPa (Max: DN80: 10 MPa; DN100: 6.4 MPa; DN150: 4.0 MPa)

◆ Medium Temperature Standard: -30℃ to +120℃, High Temperature: 120℃ to 350℃

Power Supply: 24VDC (12~36VDC)

Output Signal: 4-20 mA DC (two-wire), HART protocol optional

Output Load 500Ω (when powered by 24V)

◆ Environmental Temperature: Field Type: -40℃ to 120℃; Remote Type: -30℃ to 60℃

Storage Conditions: Temperature: -40℃ to 85℃; Humidity: ≤85%

◆ Connection Type: Flanged connection, Flange Standard: GB/T9119-2000, Users may (other connection types can be negotiated with the manufacturer)

Cable Interface M20x1.5

◆ Enclosure Protection IP65

◆ Explosion-proof Mark: Intrinsically Safe Type: ExiaIICT6, Flameproof Type: ExdIICT6

◆ Pressure Loss, see flow table

◆ Medium Viscosity: DN15: η＜5 mPa.s, DN25: η＜250 mPa.s, DN50～DN150: η＜300 mPa.s

◆ Material for Liquid Contact: R1: 304, 1Cr18Ni9Ti; Ro: 316, 0Cr18Ni12Mo2Ti

RL: 316L, 00Cr17Ni14Mo2Ti; Ti: Titanium alloy; Rp: Polytetrafluoroethylene lining.

Magnetic Filter:

If ferromagnetic particles are present in the medium, a magnetic filter should be installed before the flowmeter's inlet.