Differential Pressure Flow Measurement Manufacturer
Flowell is a differential pressure flow measurement manufacturer producing orifice plates, orifice flange unions, venturi tubes, flow nozzles, meter tubes, and supporting accessories for industrial piping systems. Every component is manufactured with the machining quality and dimensional accuracy that dependable DP measurement requires, from first installation through long service life. Whether the project is a new meter run or a legacy system upgrade, Flowell can help match the right primary element and configuration to the actual service conditions.
For technical guidance before ordering, use the flow measurement systems overview to navigate to the right primary element and supporting hardware. To browse the full product lineup, visit flow measurement products. For a fast quote, send process details through contact us or sizing support.
Flow Measurement Systems
These system pages cover primary element selection, supporting hardware, installation considerations, and accuracy requirements for the most common differential pressure measurement configurations. Use them to match the right assembly to the service before moving to individual product pages.
Industries Served
Flowell manufactures flow measurement products for industrial sectors where differential pressure measurement is the standard approach and measurement quality has direct operational consequences. The applications below represent the most common service environments across our product lines.
Oil and Gas
Chemical and Petrochemical
Power Generation
Water and Wastewater
Midstream and Pipeline
General Industrial
How to Select the Right Flow Measurement Products
Selecting the right flow measurement products starts with the process data, not the product catalog. The most common specification mistakes happen when line size alone drives the decision and operating conditions, allowable pressure loss, and surrounding installation geometry are addressed later. The inputs below are the starting point for any DP flow measurement selection.
Required process data for selection
- Pipe size, schedule, and internal diameter
- Media type and composition (gas, liquid, steam)
- Operating pressure and temperature range
- Minimum, normal, and maximum flow rate
- Allowable permanent pressure loss
- Material requirements and any documentation needs
- Available straight run and known upstream disturbances
Choosing between orifice plates and venturi tubes
For most broad industrial service, orifice plate systems offer practical serviceability, strong standards coverage, and lower initial cost. When permanent pressure loss is a significant operating concern, venturi flow meter systems typically deliver better pressure recovery at the same differential. For high-velocity or erosive service, flow nozzles provide a more durable primary element edge. Use sizing support to send your process data and get a recommendation aligned to your actual conditions.
Additional guidance on how operating conditions affect device selection is available through key factors to consider when choosing the right flow meter and the different types of flow meters.
What We Build
Flowell manufactures differential pressure primary elements, meter-run assemblies, and supporting accessories used across oil and gas, chemical processing, power generation, water and wastewater, and industrial facilities. From stocked configurations to build-to-spec projects, the focus is on repeatable machining, consistent fit-up, and responsive quote support.
Orifice plates, orifice flange unions, venturis, flow nozzles, and meter tubes for differential pressure measurement service.
Non-standard dimensions, special alloys, and documentation support for projects that fall outside catalog configurations.
Strainers, condensate chambers, bleed rings, straightening vanes, and studding outlets for complete meter run installations.
Sizing inputs, lead-time clarity, and quote response that helps projects move from specification to order.
Fast Path to a Quote
Send the essentials and Flowell will route you to the right configuration for your service.
- Line size and internal diameter
- Media (gas, liquid, or steam)
- Operating pressure and temperature
- Minimum, normal, and maximum flow rate
- Allowable permanent pressure loss
- Material and documentation requirements
Popular Flow Measurement Products
These are the most commonly specified components for differential pressure flow measurement builds and meter-run assemblies. For system-level selection guidance, use the system pages above to avoid mismatched components before moving to individual products.
Measurement Accuracy and Calibration
Accurate flow data depends on more than selecting the right primary element. Plate edge condition, tap alignment, upstream flow disturbances, straight-run availability, and beta ratio all affect how well the installed assembly performs relative to the design intent. Understanding these factors before installation is what separates systems that hold their calibration from ones that drift and require frequent attention.
Flow measurement products and long-term accuracy
Flowell manufactures to the dimensional tolerances that matter for DP measurement performance. Sealing faces, tap bores, plate seating surfaces, and bore concentricity are all machined and inspected to reduce the sources of drift that are most common in the field. For teams troubleshooting an existing measurement point or designing a new one, flow meter accuracy and calibration covers the full range of factors that affect measurement confidence.
Related accuracy resources
Machining Quality and Build Standards
Every flow measurement component Flowell produces is manufactured with attention to the dimensional details that actually affect field performance. Bore concentricity, sealing face condition, tap alignment, and edge sharpness are not incidental to DP measurement accuracy. They are the factors most directly responsible for whether an installed assembly performs as designed or introduces measurement uncertainty that compounds over time.
For standard configurations, Flowell stocks and builds to established dimensional practices. For projects with non-standard requirements, build-to-spec support through custom machine work covers non-standard line sizes, special alloy materials, and documentation requirements including material test reports. For broader context on how measurement hardware aligns with published engineering frameworks, the American Society of Mechanical Engineers (ASME) and American Gas Association (AGA) both publish widely referenced standards for DP flow measurement applications.
What to include when requesting custom machining
- Dimensional drawings or reference specifications
- Material specification and grade
- Documentation requirements (MTRs, inspection reports)
- Operating pressure, temperature, and media
- Applicable standard or project specification
Frequently Asked Questions
What flow measurement products does Flowell manufacture?
Flowell manufactures differential pressure primary elements and supporting components including orifice plates, orifice flange unions, venturi tubes, flow nozzles, meter tubes, straightening vanes, bleed rings, condensate chambers, and carbon and stainless steel strainers. Build-to-spec machining is available for non-standard configurations. Browse the full range at flow measurement products.
Where should I start to avoid choosing the wrong configuration?
Start with the system pages. Differential pressure flow measurement provides the selection foundation, then move to either orifice plate flow meter systems or venturi flow meter systems depending on the application. For performance and maintenance considerations, flow meter accuracy and calibration adds important context before committing to a design.
What information is needed for sizing support?
The most useful starting details are line size and internal diameter, media type, operating pressure and temperature, minimum and maximum flow rate, and allowable permanent pressure loss. Include any material requirements or applicable project standards. Send through sizing support or contact us directly.
What is the difference between orifice plates and venturi tubes?
Both are differential pressure primary elements but they generate the measurement differential differently. Orifice plates create a larger permanent pressure loss and are generally more practical to maintain because the plate can be accessed without removing the full assembly from the line. Venturi tubes produce a lower permanent pressure loss, which reduces operating costs in services where recovering that pressure matters, but the full assembly typically needs to be removed for any internal inspection. Ultrasonic vs differential pressure flow meters also covers how both compare to non-DP alternatives.
Does Flowell support custom machining outside standard catalog configurations?
Yes. When standard dimensions, materials, or documentation requirements do not match the project needs, Flowell can assist through custom machine work. Include dimensional drawings, material specifications, documentation requirements, and any applicable project standards when submitting the request.
How do I know if my installation needs straightening vanes or a meter tube?
Straightening vanes are typically specified when the available upstream straight run is less than the minimum required by the beta ratio and upstream disturbance type, and the constraint is physical space rather than budget. Meter tubes provide a prefabricated straight-run section with a known, controlled internal geometry and are often more practical in retrofit projects where the existing piping layout was not designed around a precision measurement point. Both options and when each makes more sense are covered in flow measurement systems.