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GT1000 Series

GT1000 Series Glass Tube Variable Area Flow Meters

Simple design. Rugged performance for high flow rates.

Models 1020N / 1024N / 1026N / 1027N

The GT1000 Series glass tube VA flow meter from Brooks Instrument is easy to read and uses simplicity of design with rugged, long-lasting flow measurement performance for a wide range of high-flow gas and liquid applications where viewing the process is important.

Featuring a clear and easy-to-read scale, the GT1000 Series O-ring seal design minimizes process downtime by allowing for convenient in-line removal of the glass tube for cleaning and maintenance. Reliable, with only one moving part, it is globally approved for use in hazardous environments.

Features

  • Wide range of flow ratings
  • Operating temperature range 33 to 125°F (1°C to 52°C)
  • Pressure ratings up to 500 psig / 34 bar
  • Two accuracy levels to choose from: 2% or 1% Full Scale
  • Optional high and low-flow reed switch or inductive alarm, also for safe use in explosive hazardous areas
  • Calibrated to process conditions with 127mm or high resolution 250mm direct reading scales
  • Brass or 316L stainless steel end fittings
  • Flanged or threaded connections
  • Horizontal or vertical connections
  • Horizontal end fittings 360° rotatable
  • 180° viewing window
  • Rugged, vented polycarbonate enclosure available on most models

Benefits

  • Tube and float can be re-ranged in line, minimizing process downtime
  • Rotatable connections for easy installation at any angle
  • Packing gland or O-ring sealing to meet piping requirements or customer preference
  • No power required; reduces installation cost and provides flow measurement in hazardous areas
  • Low-pressure drop allows for economical pump selection
  • Optional needle valve mounted to inlet or outlet for setting the desired flow
  • Optional economical brass fittings for delicate applications (e.g. avoidance of hydrogen embrittlement)

Applications

  • Industrial processes
  • Pharmaceutical production
  • Oil and gas pumping and refining processes
  • Chemical manufacturing
  • Burner control
  • Water treatment and distribution systems

Specifications

Performance Mechanical Compliance Diagnostics & Display

Product Type Glass Tube VA Flow Meter
Applications: Clean liquids and gases
Differentiator Removable borosilicate glass metering tube for easy service without removing the meter, minimize downtime
Process connections can be rotated 360°, 180° viewing window, panel mount option
One or two flow alarms are available, alarms are safe use in explosive atmospheres
Reliable o-ring seal design for leak free process connections
Optional needle valves mounted to inlet or outlet for precision flow control
Flow Range (Full Scale Capacity) Water
98 gpm / 22,000 lphAir
270 scfm / 440 m3n/hrSee Capacity Tables in Data Sheet
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
Repeatability Less than 0.5% Full Scale
Metering Tube Material Borosilicate Glass
Scales Single or Dual Detachable Aluminum Plate
Scale Length 127mm, 200mm and 250mm
Scale Graduations Choice of direct reading units, millimeter or percentage of maximum flow with factor tag.
Window Material Polycarbonate with UV Inhibitor
Float Material Size 2 and 6: Glass, Sapphire, Carboloy, 316 Stainless Steel
Size 7: Glass, 316 Stainless Steel
Size 8 to 13: 316 Stainless Steel
Float Stops Sizes 2 through 13: Teflon
Housing Cast Aluminum with Epoxy Paint Coating
End Block Options Brass or 316 Stainless Steel (1.4404)
O-Ring Materials Viton® fluoroelastomer
Buna-N
Kalrez® 4079 fluoroelastomer
EPDM
Connection Materials Brass or 316 Stainless Steel (1.4404)
Process Connections Brass Construction: NPT, BSPT / Rc Female connections
316 Stainless Steel Construction: NPT, BSPT / Rc Female connections or 150# Flanges per ASME B16.5
Optional Equipment
Ratings
Max Pressure Refer to Maximum Pressure Ratings Table in Data Sheet
Max Temperature 121oC (250oF)
PED Categories See PED Categories Table in Data Sheet
Sizes 2 through 10 meet PED Category SEP
Sizes 12 & 13 do not conform to PED
Certifications/Approvals International Calibration Certificate (ICC)
Material certification
Pressure Test certificate
Oxygen Cleaning certificate
Certificate of Conformance
Alarms Reed Switch – Sizes 7 to 13
Inductive Switch – Sizes 2 & 6
Fluid Temperature Range Meter
33 to 250°F  /  1 to 121°CAlarm Option
Reed Switch: 33 to 250°F  /  1 – 121°CInductive Switch: 33 to 167°F  /  1 – 75°C
Ambient Temperature Range 33 to 125°F / 1 to 52°C

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