I. Brief Introduction:

This photo showcasesExplosion-proof metallic tube float flowmeterThe sensor in the photo features a vertical down-in, up-out structure. The standard material for the sensor is 304 stainless steel (optional materials include 316, 316L, and PTFE, etc.). It is powered by 24VDC and outputs 4-20mA. Users can choose the explosion-proof grade ExdIICT6 and options such as HART protocol. The sensor structure can be selected from various types based on the actual on-site conditions.

Overview:

    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 gained widespread application 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.

Flow Meter Type:

TF SeriesMetal Tube FloatThe flow meter consists of a measuring tube (sensor) and an indicator (electronic converter). By selecting different types of measuring tubes and indicators, various complete units can be assembled to meet on-site requirements.

The TF series metal tube float flowmeters are divided into 5 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 top outlet type. Each type also features standard models, high-temperature models, jacketed models, and so on.

Horizontal Installation TypeFlow meterFor sizes less than or equal to DN50, choose the T-type structure; for sizes greater than DN50, opt for the spring structure.

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

Indicator Selection:

Users can choose on-site display, battery-powered, wired remote, intrinsically safe, explosion-proof, or HART-protocol-enabled models according to their actual site needs. Detailed function descriptions of various indicators 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 for instantaneous flow rate or percentage scale value.

M3 model

Local digital display, battery-powered, without 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 is usable for 6 months, and should be replaced 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, featuring on-site pointer indicating instantaneous flow and digital display of both instantaneous and accumulated flow. Two-wire system with 4-20mA output. The panel is equipped with 4 buttons for viewing and modifying internal parameters. Detailed usage on page 18.

M5 model

Electrical remote transmission, explosion-proof design with ExdⅡCT6 marking, optional HART protocol functionality. Powered by DC24V, featuring a local pointer indicating instantaneous flow rate and a 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 Highlights:

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

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

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

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

◆　Ideal for flammable, explosive hazardous environments ◆　Available with 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 negotiation with the manufacturer)

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

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

Accuracy 1.5 grade, 1.0 grade (special)

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

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

Output Load 500Ω (at 24V power supply)

◆ Environmental Temperature: Local Type: -40℃～120℃; Remote Type: -30℃～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

Shell 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, DN50-150: η < 300 mPa.s

◆ Liquid-Receiving Material 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.