Overview:

    intrinsically safe metal tube float flowmeterThe (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, especially for low flow rates and small 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 FlowmeterComposed of measuring tubes (sensors) and indicators (electronic converters), various configurations 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 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 and side outlet type, side inlet and side outlet type, and side inlet and top outlet type. Each type also has standard, high-temperature, and jacketed versions, among others.

For horizontal installation flowmeters, choose T-type structures when the diameter is less than or equal to DN50, and spring structures when 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; threaded and clamp connection methods are also available.

Indicator Selection:

Users can select on-site display, electric remote transmission, intrinsically safe, explosion-proof, or HART protocol-compatible models based on actual site requirements. Detailed functional 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 to 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 display shows the "T" character (battery model: ER26500, 3.6V, 7.5AH, -55℃~85℃).

M4 Model

Electrical remote transmission, intrinsic safety design, explosion-proof marking ExdⅡCT6, optional HART protocol function. DC24V power supply,现场 pointer indicates instantaneous flow and digital display for instantaneous and accumulated flow. Two-wire system 4~20mA output, panel 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 explosion-proof marking, optional HART protocol functionality. Powered by DC24V,现场pointer indicates instantaneous flow and digital display of instantaneous and cumulative flow. Two-wire system with 4-20mA output, panel equipped with 4 buttons for viewing and modifying internal parameters.

Feature Highlights:

◆ Suitable for low-pressure and low-flow medium flow measurement ◆ Reliable operation, minimal maintenance, long service life

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

◆ Dual-line LCD display, instantaneous/accumulative flow rate displayed 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 ◆　Optional DC power or battery-powered operation

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

Technical Specifications:

◆ Flow Meter Sizes: DN15, DN25, DN50, DN80, DN100, DN150 (Other sizes upon manufacturer consultation)

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 range)

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

Accuracy Grade 1.5, Grade 1.0 (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℃

Supply Voltage: 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℃ 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

◆ Shell 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

◆ R1 Liquid-Receiving Material: 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.