FlowMaxx Engineering

What FlowMaxx Engineering does

FlowMaxx Engineering is a privately held, micro-scale industrial manufacturer founded in 2001 that designs and builds precision flowmeters for measuring gas and liquid flow in piping systems. Its core product portfolio comprises four ASME-spec product lines: Sonic Nozzles (Critical Flow Nozzles, MFC-7M), Venturi Flowmeters (MFC-3M), ASME Flow Nozzles, and Cavitating Venturis for liquids. All products are available in stainless steel, carbon steel, and aluminum, with end connections spanning 37° flare (AN), NPT, ANSI flanges, and slip-on hose, and custom sizing from 1/2" to 8" and beyond. The company's underlying technology is grounded in Bernoulli's equation and choked-flow physics, with Venturi designs offering up to 80% pressure recovery and Sonic Nozzle operation becoming independent of downstream pressure once a 1.2:1 pressure ratio is achieved.

The company generates revenue primarily through one-time sales of calibrated and uncalibrated flowmeters, supplemented by NIST-traceable calibration services offering 0.1%-0.5% uncertainty, with curve-fit functions and tabulated calibration data. It serves three primary vertical segments: aerospace (where Sonic Nozzles are an industry standard for air flow measurement), industrial manufacturing (process control and quality assurance), and emissions testing laboratories (where the SAO product serves as a CVS flow stand calibration standard). It does so through a direct sales model via phone and email (817-428-0411, 800-810-FLOW, [email protected]), with products designed to ASME and ISO international standards. The firm operates with 1-10 employees, holds no disclosed patents, and has not raised external funding.

The business model is a focused, high-mix/low-volume engineered-to-order manufacturer with a recurring service layer in calibration. The firm relies on technical specification sales and direct engineering engagement rather than digital marketing or distribution partnerships. Its products command accuracy advantages (Sonic Nozzle uncalibrated accuracy of ±1% per ASME MFC-7M, 10:1 Venturi turn-down ratio) and durability advantages (no moving parts, no sharp edges prone to erosion) that align with regulated and mission-critical use cases in aerospace certification and emissions compliance.

Name

FlowMaxx Engineering

Legal name

FlowMaxx Engineering

Website

https://flowmaxx.com

Company type

Private

Founded year

2001

Operating status

Operating

Headcount range

1–10 employees

Short description

FlowMaxx Engineering, founded in 2001 and based in Roanoke, VA, manufactures ASME-spec flowmeters (Sonic Nozzles, Venturi, ASME Flow Nozzles, Cavitating Venturis) and NIST-traceable calibration services for aerospace, industrial, and emissions testing customers via direct sales.

Ownership category

akta.pro rank

Product category

Industrial Flow Measurement Instruments

NAICS

Totalizing Fluid Meter and Counting Device Manufacturing (334514)

SIC

Totalizing Fluid Meters & Counting Devices (3824)

akta.pro primary industry

Sensors & Feedback Devices (Pressure, Flow, Position, Encoders, Transducers) (IMAHAGAK)

akta.pro secondary industry

Specialty & Metering Pumps (IMAHANAC)

Keywords

• Flow measurement instruments
• Industrial flowmeters
• Gas flow measurement
• Liquid flow measurement
• Flowmeter calibration services

Headquarters

HQ city

Roanoke

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Flow Measurement Equipment Sales: Manufactures and sells Sonic Nozzles, Venturi Flowmeters, ASME Flow Nozzles, and Cavitating Venturis. Products available in stainless steel, carbon steel, aluminum, and other materials. Both calibrated and uncalibrated versions offered. Uncalibrated flowmeters include theoretical performance curves based on ideal theoretical data.
2. Calibration Services: NIST traceable certified calibrations provided for all flowmeters. Includes performance curves with curve-fit functions and tabulated calibration data. Standard configurations as well as custom designs available.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

FlowMaxx Engineering designs and manufactures precision flowmeters — Sonic Nozzles (Critical Flow Nozzles), Venturi Flowmeters, ASME Flow Nozzles, and Cavitating Venturis — for measuring gas and liquid flow in piping systems. Products are manufactured in stainless steel, carbon steel, aluminum, and other materials, conform to ASME MFC-7M and MFC-3M specifications, and are paired with NIST traceable calibration services providing 0.1%-0.5% accuracy.

Product overview

FlowMaxx Engineering is a manufacturer of precision flow measurement instruments, offering a portfolio of four core product lines: Sonic Nozzles (Critical Flow Nozzles), Venturi Flowmeters, ASME Flow Nozzles, and Cavitating Venturis. These products work together as primary flow elements for measuring gas and liquid flow in piping systems, designed in accordance with ASME and ISO standards. The company complements its instrumentation products with NIST-traceable calibration services offering 0.1% to 0.5% accuracy levels. All flowmeters are available in stainless steel, carbon steel, aluminum, and other materials upon request, with various end connection options including 37° flare (AN), NPT pipe threads, ANSI flanges, and slip-on hose.

Differentiator

Problem solved

Functional benefit

Products and services

• Sonic Nozzles (Critical Flow Nozzles) Converging-diverging flowmeters designed to ASME MFC-7M Specifications that achieve sonic/choked flow state for gas flow measurement, with inlet pressure serving as the primary determinant of flowrate. Industry-standard air flow measurement device for aerospace testing and certification. Available in stainless steel, carbon steel, aluminum and other materials, with most end connection types. Air flow ranges from 0.0003 pounds per second (0.25 scfm) and up.
• Venturi Flowmeters Differential producing flowmeters (Sub-Sonic Venturi, Venturi Tube, SAO, Meter Run) designed to ASME MFC-3M Specifications for measuring gas and liquid flow using Bernoulli's principle. The pressure recovery exit section recovers up to 80% of differential pressure. Air flow ranges from 0.0005 pps (0.4 scfm) and up. Available for most gases and liquids with various end connection types.
• ASME Flow Nozzles Flow measurement devices designed to ASME MFC-3M Specifications that produce lower permanent pressure loss than orifice plates and deliver nearly twice the maximum flow rate of an orifice plate at the same differential pressure. No sharp edges in the flow stream to erode or cause calibration shift. Available for most gases.
• Cavitating Venturis (Cavitating Nozzles) Liquid flowmeters that fix or lock liquid flowrate independent of downstream conditions by using the liquid's vapor pressure point at the throat to limit flow. Functions as the liquid analogue of a Sonic Nozzle's velocity shockwave for gases. The throat is sized so that differential pressure from inlet to throat drops the liquid to its vapor pressure, causing vapor bubbles that physically block the throat and cap flow.
• Calibration Services NIST traceable certified calibrations for all FlowMaxx flowmeters, providing 0.1%-0.5% accuracy (uncertainty). Performance curves with curve-fit functions are provided alongside tabulated calibration data, and curve-fit functions can be programmed directly into spreadsheets using only pressure and temperature measurements. Standard configurations and custom designs supported; suitable for continuous monitoring or periodic calibration of installed flowmeters.

Quantifiable outcome

• Up to 80% pressure recovery in Venturi designs
• +3 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators3 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• Honeywell Process Solutions: Honeywell supplies industrial process measurement instrumentation, including flowmeters, for refining, chemical, and aerospace test applications. Comparable to FlowMaxx in flow measurement technology and target aerospace/industrial customers, though as part of a much larger automation portfolio.
• Siemens Process Instrumentation: Siemens offers SITRANS flow measurement products for industrial automation, including magnetic, Coriolis, ultrasonic, and differential pressure flowmeters. Comparable to FlowMaxx in process flow measurement technology, with much broader portfolio and integration into Siemens' larger industrial automation ecosystem.
• Endress+Hauser: Endress+Hauser is one of the largest industrial process measurement manufacturers globally, with a comprehensive flowmeter portfolio including differential pressure, Coriolis, ultrasonic, and electromagnetic devices. Comparable to FlowMaxx in serving process industries requiring ASME/ISO-compliant flow measurement, with much broader product and geographic reach.
• Foxboro (Schneider Electric): Foxboro, part of Schneider Electric, supplies differential pressure flowmeters and primary flow elements for process industries under the I/A Series. Comparable to FlowMaxx in offering ASME-compliant primary flow elements (orifice, Venturi, nozzle) for industrial process applications, though within Schneider's much larger automation portfolio.
• Yokogawa Electric: Yokogawa offers a full flowmeter product line for oil & gas, chemical, and power industries, including differential pressure and Coriolis technologies. Comparable to FlowMaxx in addressing industrial process flow measurement with high accuracy requirements, though with far broader scale and product breadth.
• Emerson Electric (Rosemount): Emerson's Rosemount line is the global market leader in industrial flow measurement, offering differential pressure, Coriolis, magnetic, and vortex flowmeters. Direct overlap with FlowMaxx in differential-pressure-based flow elements (Venturi, nozzle) for industrial process applications, though Emerson serves vastly broader end markets with much larger scale.
• ABB Measurement & Analytics: ABB's measurement products business supplies flowmeters, pressure transmitters, and analytical instruments for process industries worldwide. Overlaps with FlowMaxx in differential pressure flow measurement for industrial process control, with substantially greater global service and support infrastructure.

Direct peers

• McCrometer: McCrometer specializes in flow measurement for water, wastewater, oil & gas, and industrial applications, with a strong focus on differential pressure and proprietary flow element designs. Highly comparable to FlowMaxx as a specialist flow measurement manufacturer serving similar industrial verticals with custom-engineered solutions.
• Badger Meter: Badger Meter is a specialist manufacturer of flow measurement and control products for water, wastewater, and industrial markets, with strong expertise in precision metering. Comparable to FlowMaxx in flow measurement focus, manufacturing specialty primary flow elements, and serving B2B industrial customers with custom-engineered solutions.
• KROHNE Group: KROHNE is a specialist flow and level measurement manufacturer with deep expertise in industrial flowmeters, including differential pressure and primary flow elements. Highly comparable to FlowMaxx in product focus on precision flow measurement for process industries, with similar emphasis on calibration accuracy and international standards compliance.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about FlowMaxx Engineering