IMI Hydronic Engineering

What IMI Hydronic Engineering does

IMI Hydronic Engineering Inc. (commercial brand: IMI Flow Design) is a Dallas, Texas-headquartered engineering firm that designs, manufactures, and distributes hydronic balancing and control valves for HVAC systems. The company is the North American subsidiary of IMI plc, a UK-listed diversified engineering conglomerate, and serves markets across North, Central, and South America and the Caribbean. Its product portfolio centers on automatic balancing valves (the AutoFlow family, including the patented hybrid-port cartridge), manual venturi-based balancing valves (Accusetter series), and the Harmony pressure-independent balancing and control valve, complemented by hook-up assemblies, ball valves, strainers, butterfly valves, and braided hose kits spanning 1/2" to 30" sizes. The company holds NSF/ANSI 61-G certification and RLDWA 2014 compliance for its lead-free ICSS and UA Zero lines used in commercial domestic hot water applications.

Name

IMI Hydronic Engineering

Legal name

IMI Hydronic Engineering Inc.

Website

https://imiflowdesign.com

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

IMI Hydronic Engineering (branded IMI Flow Design) designs and manufactures hydronic balancing and control valves for HVAC systems, serving commercial buildings and mechanical contractors across the Americas through a rep network and direct sales.

Ownership category

akta.pro rank

Product category

Hydronic Balancing and Control Valves

NAICS

Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF)

akta.pro secondary industry

Plumbing Valves & Controls (Shutoff, Mixing, Backflow) (IMADALAB)

Keywords

• Hydronic balancing valves
• HVAC flow control
• Pressure independent valves
• Automatic balancing valves
• Hydronic system components

Headquarters

HQ city

Irving

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hydronic Valve Products: IMI Hydronic Engineering generates revenue through the sale of hydronic balancing valves, control valves, and associated components for HVAC systems. Products include automatic balancing valves (AutoFlow), manual balancing valves (Accusetter), pressure independent valves (Harmony), hook-up kits, and hoses.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels7 records

Core offering

IMI Hydronic Engineering (operating in North America as IMI Flow Design) manufactures and sells hydronic balancing and control valves for HVAC systems, including AutoFlow automatic balancing valves, Accusetter Venturi-based manual balancing valves, the Harmony pressure independent balancing and control valve (PIBCV), lead-free balancing valves (ICSS, UA Zero), VersaFlow hose kits, and supporting hook-up components. The product line covers sizes from 1/2 inch to 30 inches with threaded, grooved, flanged, and welded end connections for commercial hydronic applications.

Product overview

IMI Hydronic Engineering (branding as IMI Flow Design in North America) offers a comprehensive portfolio of hydronic balancing and control products for HVAC systems. The product line centers on two main balancing technologies: AutoFlow Automatic Balancing Valves (including AC/ACR, WS, WG, WB, WR, WT, YR, ACA/ACRA series) and Accusetter Manual Balancing Valves (including UA, UASBS, AF/AG, ET, VG/VF series). Supporting these core products are hook-up components (UB ball valves, YC/YCR strainers, BF butterfly valves), VersaFlow hose kits (Kit A, AC, B, C), and the Harmony Pressure Independent Balancing and Control Valve. The portfolio also includes lead-free options (ICSS, UA Zero) for potable water applications meeting NSF/ANSI 61-G and RLDWA 2014 standards. Products range from 1/2" to 30" in size with various connection types including threaded, grooved, flanged, and welded ends.

Differentiator

Problem solved

Functional benefit

Products and services

• AutoFlow Automatic Balancing Valves Factory-set automatic flow limiting valves that limit flow to within 5% of a specified amount across sizes from 1/2 inch to 30 inches, including AC/ACR, AC SBS/ACR SBS, YR, WS, WG, WB, WR, WT, ACA/ACRA, and YRA variants with various end connections. Designed for HVAC hydronic system designers, mechanical contractors, and facility owners needing automatic terminal unit flow control.
• Accusetter Manual Balancing Valves Venturi-based manual balancing valves accurate to within 3% or better, including UA, UASBS, AF/AG, ET, and VG/VF series from 1/2 inch to 14 inches, with union options, memory stops, and stainless steel variants. Used by mechanical contractors and balancing contractors to commission hydronic HVAC systems.
• Harmony Pressure Independent Balancing and Control Valve Pressure Independent Balancing and Control Valve (PIBCV) with full stroke and no lift limitation, direct flow setting and readout, breakaway isolation valve, and digitally configurable actuator, capable of saving up to 50% in commissioning time. Built for variable flow HVAC hydronic systems in commercial buildings.
• Lead-Free Balancing Valves Lead-free Accusetter Venturi balancing valves (UA Zero) and inline stainless steel automatic balancing valves (ICSS) certified to NSF/ANSI 61-G and RLDWA 2014 standards for commercial domestic hot water circulation and contact applications.
• VersaFlow Hose Kits Self-balancing and manual balancing hook-up hose kits (Kit A, Kit AC, Kit B, Kit C) from 1/2 inch to 2 inches, bundling AutoFlow regulators, Accusetter venturi valves, ball valves, Y-strainers, and braided stainless steel hose assemblies. Targeted at mechanical contractors installing terminal unit connections.
• Stainless Steel Balancing Valves 243/25 Series stainless steel balancing valves from 1/2 inch to 10 inches with PT ports and flanged or welding ends, suited for hydronic applications requiring stainless steel construction.
• Hook-up Components Standalone hydronic system components including UB/UBSBS/UBM shut-off ball valves with blowout-proof stems, UP unions with port options, YC/YCR/YW Y-strainers with stainless steel screens, and BF butterfly valves from 1/2 inch to 14 inches. Sold individually to mechanical contractors and distributors.
• Braided Stainless Steel Hose Assemblies H2 and H3 braided stainless steel hose assemblies with EPDM inner tube and brass or steel fittings, used to connect terminal units in hydronic HVAC systems.
• Erie Control Valves Two-way (E2) and three-way (E3) Erie modulating control valves for HVAC hydronic applications.

Quantifiable outcome

• 5% flow accuracy over 95% of control range for AutoFlow valves
• +2 more outcomes

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• IMI Precision EngineeringminorOthersCorporate sibling within IMI plc group. Alex Engleby joined IMI Hydronic from IMI Precision Engineering where she held sales positions including Product Sales Engineer: Valves.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Johnson Controls: Johnson Controls is a major HVAC and building controls supplier that offers valves, actuators, and integrated flow control solutions alongside broader BMS offerings, serving the same commercial building end-customers as IMI Hydronic.
• Danfoss: Danfoss Climate Solutions produces pressure independent control valves, balancing valves, and actuators for HVAC, competing with IMI's Harmony and broader hydronic portfolio as part of a much larger industrial portfolio.
• Watts Water Technologies: Watts is a diversified manufacturer of valves, flow control, and plumbing products including lead-free valves for potable water, overlapping with IMI's domestic hot water and lead-free product lines (ICSS, UA Zero).

Others

• Victaulic: Victaulic specializes in mechanical pipe joining and flow control assemblies used in hydronic and mechanical systems; it is an ecosystem participant in the same commercial HVAC value chain even though its core product is not balancing valves.

Direct peers

• Bell & Gossett (Xylem): Bell & Gossett is a leading manufacturer of hydronic balancing valves, pumps, and accessories for HVAC systems, directly competing with IMI Flow Design's AutoFlow and Accusetter product lines in commercial hydronic balancing applications.
• Caleffi Hydronic Solutions: Caleffi manufactures automatic and manual balancing valves, pressure independent control valves, and hydronic components for HVAC, serving the same consulting engineers, mechanical contractors, and facility managers as IMI Hydronic Engineering.
• FlowCon International: FlowCon manufactures pressure independent and dynamic balancing valves for HVAC, directly overlapping with IMI's Harmony PIBCV and AutoFlow product families in commercial hydronic balancing applications.
• Oventrop: Oventrop is a European-headquartered manufacturer of hydronic balancing valves, controls, and distribution systems for HVAC, with comparable product technology and target customer base to IMI Flow Design.
• Griswold Controls: Griswold specializes in pressure independent and automatic balancing valves for HVAC systems, overlapping directly with IMI's Harmony PIBCV and AutoFlow automatic flow limiting product offerings.
• Taco Comfort Solutions: Taco provides hydronic balancing valves, pumps, and accessories for HVAC applications, competing with IMI Hydronic in the same commercial building channel through rep networks and specifier relationships.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/imiflowdesign
• Instagraminstagram.com/IMIHydronicNA
• Xx.com/IMIHydronicTX

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Subsidiaries1 record

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 IMI Hydronic Engineering