Overview:

    intrinsically safe metal tube float flowmeterThe Tube Rotameter (Metal Tube Rotameter) is a commonly used variable area flow measurement instrument in industrial automation process control. It features a small size, wide detection range, and ease of use. It is suitable for measuring the flow of liquids, gases, and steam, especially for low flow rate and low volume measurements. Over the years, the Metal Tube Float Flowmeter has been widely applied in industries such as petrochemicals, steel, electricity, metallurgy, light industry, food, pharmaceuticals, and water treatment, due to its excellent performance, reliability, and favorable performance-to-price ratio.

Flowmeter Type:

TF SeriesMetal Tube Float Flow MeterComposed of measuring tubes (sensors) and indicators (electronic converters), different forms of measuring tubes and indicators can be selected to assemble into various complete units, catering to on-site requirements.

The TF series metal tube float flow meters categorize the product into five types based on the direction of the fluid's 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-top outlet type. Each type features standard, high-temperature, jacketed, and other versions.

Level-mounted flowmeters with diameters less than DN50 (inclusive) should use T-shaped structures, while those with diameters greater than DN50 should use spring structures.

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-compatible 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 device; scale can be set to instantaneous flow value or percentage scale value.

M3 Model

Local digital display, battery-powered, no 4-20mA remote transmission, non-explosion-proof. LCD shows instantaneous and cumulative flow rates, on-site buttons for viewing and modifying parameters. Battery lasts for 6 months; replace the battery when the display shows the "T" character (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 of 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 instructions on page 18.

M5 model

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

Feature Description:

◆　Ideal for low flow rate and small bore medium flow measurement ◆　Reliable operation, minimal maintenance, and long lifespan

◆ Not strict requirements for straight pipe section ◆ Wide range ratio of 10:1

◆ Dual-line LCD display, showing instantaneous/accumulated flow rate on-site ◆ Equipped with a 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, explosive and hazardous environments ◆　Available in either 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 available upon manufacturer's negotiation)

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

Range ratio: 10:1, 20:1 (special)

◆ Accuracy: 1.5 grade, 1.0 grade (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℃

24VDC (12-36VDC) power supply

Output Signal: 4-20mA DC (Two-wire system), with optional HART protocol

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 M20×1.5

◆ Enclosure Protection IP65

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

◆ Pressure Loss, see flow chart

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

◆ Fluid Receiving Material R1: 304, 1Cr18Ni9Ti; Ro: 316, 0Cr18Ni12Mo2Ti

RL: 316L, 00Cr17Ni14Mo2Ti; Ti: Titanium alloy; Rp: PTFE-lined.

Magnetic Filter

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