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MT3809 Series Metal Tube Variable Area Flow Meters

Widest temperature, pressure and process range. One proven meter.
Models 3809G / 3809G ELF / 3809G TFE Lined / 3810G

Engineered to work where you need it: Choose the MT3809 variable area (VA) flow meter (rotameter) for all the high-pressure, high-temperature VA flow measurement and control requirements on your next project.

Proven to deliver reliable, repeatable gas and liquid flow measurement and control in thousands of installed locations, the MT3809 is practical and economical, making it the “go-to” choice for Engineering Procurement Contractors (EPC) and major industrial facilities worldwide.

The MT3809G configuration features a digital LCD display with local operator interface, providing valuable process outputs such as totalization and alarm signals. It also lets users make parameter changes without removing the cover, which means changes can be made even in hazardous areas.

Questions?

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Call: 1-888-554-3569

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Features

  • Extremely wide range of flow ratings - supports very low to very high flow rates
  • Temperature ratings from -325°F to 788°F (-198°C to 420°C )
  • Pressure ratings up to 6,000 psi (standard products) and up to 20,000 psi (custom models)
  • Enhanced LCD display with local operator interface (optional)
  • High-/low-flow alarm functions that meet SIL 2 requirements
  • 316SS stainless steel flameproof housing meets ATEX gas group IIC/Class 1 Div 1 hazardous area rating
  • Selection of corrosion resistant wetted materials and indicator housing to fit demanding application needs
  • Gasket sealing surface meets ASME requirements, no special gaskets required
  • Improved transmitter has HART 7 capability and worldwide approvals

Benefits

  • Repeatable flow measurement even at very low process temperatures and the highest process temperatures of any VA meter
  • Designed to meet ASME B31.3 – a requirement requested at the world’s major industrial facilities
  • Product documentation, material traceability and project planning perfectly blends with the needs of EPC system integrators
  • No power required – reduces usage cost and installation complexity
  • A reliable flow measurement technology that can communicate to control systems over analog or digital interfaces even when power is not available
  • Broad pressure and temperature range enables choosing one meter for multiple uses
  • Excellent reliability and dependability – in use for decades worldwide
  • Globally approved for use in explosive, hazardous environments, meeting the highest international explosion safety requirements
  • Multiple connection options for easier installation
  • Unique flange design avoids the need for special gaskets
  • Weldneck flanges are standard and can be examined for integrity

Applications

  • Basic liquid or gas flow measurement
  • Monitoring lubrication and/or coolant for rotating equipment
  • Measurement of additives
  • Monitoring gases for furnaces
  • High-pressure flow on offshore oil platforms
  • Chemical injection
Product Type

Metal Tube Variable Area Flow Meter

Applications:  Clean liquids, gases and steam

Differentiator

Repeatable flow measurement even at low process temperatures down to -198°C / -325°F and high process temperatures up to 420°C / 788°F

Designed for high process pressures 1379 bar(a) / 20,000 psig

Customers can rely on a proven flow measurement technology that works when electrical power is not availableand at the same time communicate to controlsystems over analog- or digital interfaces

Optional local operator interface with LCDscreen for easy operator control and alarm functions that meet SIL 2requirements

A selection of corrosion resistant wettedmaterials and indicator housings to fit your demanding applications

Product is designed to meet ASME B31.3 which isa requirement requested at the world’s major industrial facilities. Productdocumentation, material traceability and project planning perfectly blends withthe needs of Engineering Procurement Contractors (EPC) system integrators

Performance
Flow Range (Full Scale Capacity)

Refer to Capacity Tables in Data Sheet

Water

440 gpm / 100,000 l/h

Air

750 scfm / 1200 m3n/hr

Pressure Drop
See Capacities & Pressure Drop Tables in Data Sheet
Accuracy

±2% Full Scale  /  Class 2.5 VDI /  VDE

±1% Full Scale  / Class 1.6 VDI  /  VDE

±5% Full Scale  /  Class 4 VDI /  VDE

±3% Full Scale  / Class 2.5 VDI  /  VDE

Repeatability

All options except ELF:  0.25% Full Scale

ELF:  1% Full Scale

Mechanical
Metering Tube Material

316 Stainless Steel

 

Scales
Single or Dual Detachable Aluminum Plate
Scale Graduations
Choice of direct reading units or percentage of maximum flow with factor tag.
Float Material

316L Stainless Steel, Alloy 625, Hastelloy C-276, Titanium GR II, Monel K-500, PVDF

Housing

Die cast Aluminum (Alloy 380) with Epoxy Paint Coating with glass window

Die cast Aluminum (Alloy 380) with Epoxy Paint Coating with shatterproof glass window

Cast 316 Stainless Steel with glass window

Cast 316 Stainless Steel with shatterproof glass window

O-Ring Materials

Flange option or Male NPT:  No O-rings

Female threaded options:  Viton fluoroelastomer, Kalrez fluoroelastomer, PTFE Teflon

Connection Materials

316L Stainless Steel, Alloy 625, Hastelloy C-276, Titanium GR II

Process Connections

All materials:  NPT, Rc (BSP) Female

All materials:  150#, 300#, 600# Flanges per ASME B16.5

All materials:  DIN PN40 Flanges

All materials:  JIS B2220 DIN 10K, 20K Flanges

Optional Equipment
Ratings
Max Pressure

Refer to Pressure/Temperature Tables in Data Sheet

PED Categories

Refer to PED Categories in Capacity Tables in Data Sheet

Ambient Temperature Range

Refer to temperature cut-off tables by option in Data Sheet

Max Temperature Range

Meter

-325 to 788°F
-198 to 420°C

Fluid Temperature Range

Refer to temperature cut-off tables by option in Data Sheet

Diagnostics & Display
Transmitter
4 - 20 mA with HART Communications
Alarms

Inductive Switch - All Sizes

Electrical
Analog Communication

Transmitter

4-20 mA

Digital Communication
HART 7
Compliance
Certifications/Approvals

International agency approvals for alarm and transmitter

SIL 2 for alarm option

International Calibration Certificate (ICC)

Material certifications

Liquid Dye Penetrant

Positive Material Identification

NACE MR 01-75 & MR 0103

Pressure Test certificate

Oxygen Cleaning certificate

Certificate of Conformance

3809G 3809G ELF 3809G TFE Lined 3810G
Differentiator Flow Meter Flow Meter Flow Meter Flow Meter
Fluid Type

Clean Liquids

Gas

Steam

Clean Liquids

Gas

Steam

Clean Liquids

Gas

Steam

Clean Liquids

Gas

Steam

Flow Range (Full Scale Capacity)

Flow Range - Water:  440 GPM  /  100,000 l/h

Flow Range - Air:  750 SCFM  /  1200 m3n/hr

Flow Range - Water:  11 GPH  /  42 l/h

Flow Range - Air:  53 SCFH  /  1.4 m3n/hr

Flow Range - Water:  66 GPM  /  15,000 l/h

Flow Range - Air:  280 SCFM  /  470 m3n/hr

Flow Range - Water:  88 GPM  /  20,000 l/h

Flow Range - Air:  390 SCFM  /  650 m3n/hr

Accuracy

+/- 2% Full Scale  /  Class 1.6 VDI /  VDE

+/- 1% Full Scale

+/- 5% Full Scale  /  Class 4 VDI /  VDE

+/- 3% Full Scale  / Class 2.5 VDI  /  VDE

+/- 2% Full Scale  /  Class 1.6 VDI /  VDE

+/- 5% Full Scale  /  Class 4 VDI /  VDE

+/- 3% Full Scale  / Class 2.5 VDI  /  VDE

Max Pressure

6000 PSIG  /  413.7 bar

6000 PSIG  /  413.7 bar

Based on selected flange rating

2567 PSIG  / 177 bar
Wetted Materials

316 / 316L Stainless Steel, Alloy 625, Hastelloy C-276, Titanium GR II

316 / 316L Stainless Steel, Alloy 625, Hastelloy C-276, Titanium GR II

316/316L Stainless Steel with Tefzel lining

316 / 316L Stainless Steel,
Process Connections

All materials:  NPT, Rc (BSP) Female

All materials:  150#, 300#, 600# Flanges per ASME B16.5

All materials:  DIN PN40 Flanges

All materials:  JIS B2220 DIN 10K, 20K Flanges

All materials:  NPT, Rc (BSP) Female

All materials:  150#, 300#, 600# Flanges per ASME B16.5

All materials:  DIN PN40 Flanges

All materials:  JIS B2220 DIN 10K, 20K Flanges

NPT (Female)

NPT, Rc (BSP) Female

150#, 300# Flanges per ASME B16.5

DIN PN40 Flanges

Analog Communication

Transmitter

4-20 mA Output

Transmitter

4-20 mA Output

Transmitter

4-20 mA Output

None

Digital Communication Digital display (LOI) Digital display (LOI) Digital display (LOI) None
Alarms

One or two inductive switches - All Sizes

One or two alarm contacts with transmitter - All Sizes

One or two inductive switches - All Sizes

None
Certifications/Approvals

Indicator

IP66/67, NEMA 4X

Flame Proof

IP66/67, NEMA 4X

Intrinsic Safety / Non-sparking / Enclosure Dust / Aluminum housing

IP64

Intrinsic Safety / Non-sparking / Enclosure Dust / 316 Stainless Steel housing

IP66/67

International agency approvals for alarm and transmitter

SIL 2 for alarm option

International Calibration Certificate (ICC)

Material certifications

Liquid Dye Penetrant

Positive Material Identification

NACE MR 01-75 & MR 0103

Indicator

IP66/67, NEMA 4X

Flame Proof

IP66/67, NEMA 4X

Intrinsic Safety / Non-sparking / Enclosure Dust / Aluminum housing

IP64

Intrinsic Safety / Non-sparking / Enclosure Dust / 316 Stainless Steel housing

IP66/67

International agency approvals for alarm and transmitter

International Calibration Certificate (ICC)

Material certifications

Liquid Dye Penetrant

Positive Material Identification

NACE MR 01-75 & MR-0103

Indicator

IP66/67, NEMA 4X

Flame Proof

IP66/67, NEMA 4X

Intrinsic Safety / Non-sparking / Enclosure Dust / Aluminum housing

IP64

Intrinsic Safety / Non-sparking / Enclosure Dust / 316 Stainless Steel housing

IP66/67

International agency approvals for alarm and transmitter

SIL 2 for alarm option

International Calibration Certificate (ICC)

Material certifications

Liquid Dye Penetrant

Positive Material Identification

NACE MR 01-75 & MR 0103

Pressure Test certificate

Oxygen Cleaning certificate

Certificate of Conformance

Indicator

IP66/67, NEMA 4X

International Calibration Certificate (ICC)

Material certifications

Functional Safety Approvals SIL 2 - Alarms None SIL 2 - Alarms None
FilenameFile TypeDocuments By Language
Data Sheet pdf English German
Installation & Operation Manual pdf English Korean Russian Spanish
HART® Supplemental Manual pdf English
Safety Supplemental Manual pdf English
Quick Start Guide pdf English

Use the following guide (model code information from data sheet) to translate the CAD configurations available below. If you need assistance or can’t find what you’re looking for, please contact Applications Engineering or your local Brooks Instrument representative.

3809G CAD File Naming Example