Product Summary

The H2O Flow Test Stand is a flow measurement system designed for flow testing heavy industrial gas turbine liquid fuel nozzles.

Key Features
  • Water Flow Range: 0.2 to 14 GPM
  • Accurate measurement (±0.5%)
  • Highly repeatable results (< ±0.25%)
Complies with OEM Test Specifications

OEMs and their suppliers worldwide require quality liquid measurement of passages in both aircraft and land-based turbine engine components. Each OEM has a unique testing specification and their suppliers must be flexible with the test procedures in order to comply with each OEM test specification. Accuracy, repeatability, throughput and availability are critical elements in the design of these test systems. These air flow test systems currently comply with the in-house testing procedures of ABB/Alstom Power, ABB Gas Turbines, Pratt & Whitney America, Pratt & Whitney Canada, General Electric Aircraft Engines (General Electric Infra, Aviation), General Electric Power Systems (General Electric Infra, Energy), Honeywell, Mitsubishi Power Systems, Mitsubishi Heavy Industries, Allison Engine, Rolls-Royce, Solar Turbines, Siemens, Siemens-Westinghouse, Snecma, and many others.

Traceable to NIST

All Flow Systems liquid flow meters and instruments (P&T) are traceable to National Institute of Standards and Technology (NIST).

System Specifications

The H2O Flow Test Stand comes in the following configuration:

Specification Value(s)
Flow Elements Micro Motion Elite Series Meter (or equivalent)
Water Flow Range 0.2 – 14 GPM (1.44 – 100.7 PPH)
Part Pressure Range 34 – 390 PSIG
Flow Number Ranges @ 34.5psi and flow range of 0.2 to 14gpm, 17< Fn <1192
@ 50 psi and flow range of 0.2 to 14gpm, 14< Fn < 990
@ 100 psi and flow range of 0.2 to 14gpm, 12< Fn < 700
@ 390 psi and flow range of 0.2 to 9gpm, 5 < Fn < 228
Accuracy ±0.5% of reading, NIST traceable
Repeatability ±0.25%, defined as 2 standard deviations divided by the mean of 20 samples
Turndown 70:1
Cycle Time 45 – 120 seconds, capcity dependent
Flow Port Connections 3/4″ (-12) Swagelok QF Female Quick Disconnect
Pressure Connections 1/4″ (-4) Swagelok Instrumentation Female Quick Connectors QC series, color-keyed
Total Dimensions 72″ H x 150″ W x 38″ D (without spray chamber)
Tank Skid Dimensions 70″ H x 27″ W x 31″ D
Pump Skid Dimensions 55″ H x 28″ W x 41″ D
Flow Stand Dimensions 65″ H x 58″ W x 36″ D
Spray Chamber Dimensions 63″ H x 48″ W x 48″ D
Weight 1000 pounds

Built with Commercial Off-The-Shelf (COTS) Components

All Flow Systems designs, the test system controller, data acquisition and control subsystems, and all instrumentation are standard and readily available Commercial Off-The-Shelf (COTS) items. This ensures that service or replacement of any item can be achieved in a timely manner, providing for high availability of our products. When applicable, this includes all of the Unit Under Test related instrumentation specified by the customer.


National Instruments LabVIEW Logo
Control System Operator Interface

The system controller handles the operation of the prime mover, sets the proper pressure at the Unit Under Test and calculates the flow number through the Unit Under Test. The controller also monitors the liquid flow conditions to ensure that the flow is stable. Controller software is written using National Instruments LabVIEW™.

Schedule Single Test or Multiple Test in Series
  • Allows any number of configured tests to be executed in a sequence
  • Virtual tests can be programmed to calculate and evaluate results based on previous test values in algebraic equations
  • Programmable pause– operator can add a pause between tests for part modification or setup before starting the next test
Data Storage Formats
  • Standard storage format is SQL database
  • Customized data storage options available
Customize Controller Software and Integrate Data
  • Controller software can be customized to fit a wide variety of customer needs
  • Data can be integrated with customer’s local databases and/or information systems
Troubleshoot Issues Using Internet-based Support – Optional
  • After connecting the test stand to the internet, receive technical support from Flow Systems
Additional Software Screenshots
Main Production Screen

Main Production Screen

Facility Requirements

The facility requirements below are to be supplied by the customer at the installation site.

Electrical Power: 460VAC / 60Hz / 3pH, 15Amp (Option: 380VAC / 50Hz / 3pH, 20 Amp)

Water Supply Requirements

Pressure Range: 20 to 100 psig
Temperature Range: Ambient
Particulatesd: Less than 5 microns

Air Supply Requirements

Flow: 50 SCFM
Pressure Range: 70 to 100 psig
Temperature Range: Ambient
Particulates: Less than 10 microns
Oil Content: Less than 10 PPM
Moisture Content: 39°F Dew point or Lower

Photos & Schematics

Additional Software Screenshots

The following are pictures and schematics of the Liquid Flow Test Stand.

Liquid Flow Test Stand: Adjusting Hoses in Spray Chamber

Portable Air Flow Test Stand being Calibrated

Liquid Test Stand with Optional Spray and Recirculation Chamber

Liquid Test Stand with Optional Spray and Recirculation Chamber

Prime Mover (Tank and Pump Skids)

Prime Mover (Tank and Pump Skids)

System Diagram

Portable Air Flow Test Stand, with connecting Sonic Nozzle and Meter Run

System Schematic (Base System)

View / Download Schematic as PDF System Schematic (Base System)

System Schematic (with Spray Chamber/Water Recirculation Tank)

View / Download Schematic as PDF System Schematic (with Spray Chamber/Water Recirculation Tank)


The following is a list of options available for this test stand:

  • Software customization including database integration, networking, SPC (Statistical Process Control) and more
  • Custom Fixturing Options
  • On-site installation, training, commissioning and upgrades
  • Water re-circulation

System Check Standards

The following optional additions are available to monitor the ongoing system accuracy and can also be used to diagnose problems:

  • Calibration cart