The Lee Company
The Lee Company is a privately held Connecticut-based manufacturer of miniature precision fluid control components — including plugs, valves, flow restrictors, pumps, and filters — serving mission-critical applications in aerospace, defense, space, medical, automotive, oil and gas, and data centers globally.
- Company typePrivate
- Founded1948
- HeadquartersWestbrook, United States
- Headcount1,001–5,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What The Lee Company does
The Lee Company is a privately held, Connecticut-based manufacturer of miniature precision fluid control components founded in 1948. The company designs and produces a 13-category product portfolio including expansion and A.F.O.® plugs, check valves, pressure relief valves, shuttle valves, flow restrictors and metering valves, shut-off valves, solenoid valves, nozzles, safety screen filters, and fixed, variable, and high-pressure pumps. Differentiated technologies such as A.F.O.® plugs, Lee QIP® expansion plugs, Lee Visco Jet® multi-orifice flow restrictors, Lee HI-BAR® safety screens, Lee Burst-Sert™ rupture discs, and Lee Spin Jet® nozzles are protected by registered trademarks, and every unit is 100% performance tested before shipment.
The company operates from over 1.2 million square feet of manufacturing space in Westbrook and Essex, Connecticut, including a 27,500 square foot Innovation Center opened in March 2026 with integrated labs and additive manufacturing capability. Distribution is global and engineered-to-engineer: five wholly-owned European subsidiaries in the UK (1975), Germany (1979), France, Italy (1994), and Scandinavia (2026) provide direct technical sales coverage, and an independent distributor and agent network extends reach across Asia, South America, Australia, the Middle East, and parts of Europe.
Revenue is generated through B2B hardware sales of both standard catalog components and custom-engineered solutions, with quote-based project pricing characteristic of an enterprise field sales motion. Primary customer verticals are aerospace and defense, space, medical equipment and diagnostics, automotive, oil and gas, power generation, motorsports, scientific instruments, and data centers. The Lee Company has supplied components for aircraft, missiles, launch vehicles, lunar landers, and medical diagnostic instruments for 75+ years, and acquired micropump specialist TTP Ventus in September 2022 to broaden its precision pumping range.
The Lee Company firmographics
Firmographics- Name
- The Lee Company
- Legal name
- The Lee Company
- Website
- https://theleeco.com
- Company type
- Private
- Founded year
- 1948
- Operating status
- Operating
- Headcount range
- 1,001–5,000 employees
- Short description
- The Lee Company is a privately held Connecticut-based manufacturer of miniature precision fluid control components — including plugs, valves, flow restrictors, pumps, and filters — serving mission-critical applications in aerospace, defense, space, medical, automotive, oil and gas, and data centers globally.
- Ownership category
- akta.pro rank
The Lee Company industry classification
Industry- Product category
- Precision Fluid Control Components
- NAICS
- Fluid Power Valve and Hose Fitting Manufacturing (332912), Fluid Power Pump and Motor Manufacturing (333996), Measuring, Dispensing, and Other Pumping Equipment Manufacturing (333914), Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513)
- SIC
- Industrial Instruments For Measurement, Display, And Control (3823), Pumps & Pumping Equipment (3561)
- akta.pro primary industry
- Pneumatic Components (FRLs, Cylinders, Valves) (IMAHAGAC)
- akta.pro secondary industries
- Specialty & Metering Pumps (IMAHANAC), Dispensing & Pump Systems (Pumps, Sprayers, Misters, Droppers) (IMALAJAB), Sensors & Feedback Devices (Pressure, Flow, Position, Encoders, Transducers) (IMAHAGAK), Filling & Dosing Machines (Liquid/Powder/Solid) (IMAHAOAF)
Keywords
Where The Lee Company is headquartered
LocationHeadquarters
- HQ city
- Westbrook
- HQ country
- United States
- HQ region
- North America
Offices27 records
Markets served
The Lee Company business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Fluid Control Components and Systems: The Lee Company generates revenue through the sale of miniature precision fluid control products including plugs, check valves, pressure relief valves, shuttle valves, flow restrictors, flow metering valves, shut-off valves, solenoid valves, nozzles, safety screen filters, and pumps. Products are sold directly through subsidiaries and through a global distributor network to customers in aerospace, defense, space, medical, automotive, oil and gas, industrial, power generation, motorsports, and scientific instrument industries. The company offers both standard off-the-shelf products and custom-engineered solutions.
Go-to-market motion1 record
Distribution channels3 records
Marketing channels5 records
The Lee Company product offering
Product offeringCore offering
The Lee Company manufactures and sells miniature precision fluid control components and systems — including expansion plugs, check valves, pressure relief valves, shuttle valves, flow restrictors, flow metering valves, shut-off valves, solenoid valves, nozzles, safety screen filters, pumps, manifolds, and fill and drain valves — for mission-critical applications in aerospace, defense, space, medical equipment, automotive, oil and gas, power generation, motorsports, data centers, and scientific instruments. The company offers both standard off-the-shelf products and custom-engineered solutions, with every unit subjected to 100% performance testing.
Product overview
The Lee Company is a manufacturer of miniature precision fluid control components founded in 1948, offering a comprehensive portfolio of fluid control products organized into the following categories: Plugs (expansion plugs and AFO plugs for sealing), Check Valves (ball-style, poppet-style, pilot-operated, zero-leak), Pressure Relief Valves (safety relief, thermal relief), Shuttle Valves, Flow Restrictors (single and multi-orifice), Flow Metering Valves, Shut-Off Valves, Solenoid Valves (control, isolation, dispense, high pressure), Nozzles (lubrication jets, atomizing), Safety Screen Filters, Pumps (fixed volume, variable volume, HPHT hydraulic), Manifolds, and Fill and Drain Valves. These products serve mission-critical applications across aerospace, defense, space, automotive, medical equipment, diagnostics, oil and gas, power generation, motorsports, scientific instruments, data centers, and industrial markets. The company also provides engineering tools including a Lohm Calculator, Product Finder, and technical handbooks. The Lee Company operates manufacturing facilities in Connecticut totaling over 1.2 million square feet and maintains subsidiaries and distributors across North America, Europe, Asia, South America, and Australia.
Differentiator
Problem solved
Functional benefit
Brands
- A.F.O. Plugs: Axial Force Only plugs providing removable and reusable sealing solutions for high pressure and high temperature manifold applications
- Lee Plug
- Lee QIP
- Lee Visco Jet
- Lee HI-BAR
Products and services
- Plugs (Lee Plugs, A.F.O.® Plugs, Lee QIP®) Expansion plugs and axial force only (AFO) plugs for sealing passages in metal manifolds and housings, providing helium leak-tight seals without O-rings or sealants. A.F.O.® Plugs provide burst pressures up to 56,000 psi and temperatures to 600°F.
- Check Valves One-way valves including ball-style, poppet-style, pilot-operated, zero-leak, extreme environment, and high pressure check valves for preventing reverse flow in fluid systems.
- Pressure Relief Valves Safety relief, thermal relief, and pressure regulation valves designed to protect systems from sudden pressure increases with fast-acting, reliable performance.
- Shuttle Valves Valves that automatically select the higher of two pressure sources to ensure continuous fluid flow in hydraulic and pneumatic systems.
- Flow Restrictors (Lee Visco Jet®) Precision single and multi-orifice restrictors providing consistent, repeatable flow metering with guaranteed flow performance and tight tolerances. Lee Visco Jet® restrictors are gas-tested, precision cleaned, high-pressure multi-orifice flow restrictors with ±5% flow tolerance.
- Flow Metering Valves Valves providing dual-function flow control for precisely controlling extend and retract rates of hydraulic actuators and cylinders.
- Shut-Off Valves Valves for isolating sections of fluid systems to enable maintenance, repair, or safe shutdown of equipment.
- Solenoid Valves Electrically-driven valves for precise control of flow, pressure, and repeatable dispensing, including control valves, isolation valves, dispense valves, and high pressure solenoid valves.
- Nozzles (Lee Spin Jet®) Lubrication jets, atomizing nozzles, and flow targeting nozzles for precise fluid application in cooling, lubrication, coating, and combustion applications.
- Safety Screen Filters (Lee HI-BAR®) Woven wire mesh, etched, and drilled safety screens protecting critical components from rogue contamination and debris in fluid systems.
- Pumps Fixed volume and variable volume dispense pumps, and high pressure hydraulic pumps for precision fluid displacement in medical, scientific, and industrial applications.
- Manifolds Custom manifold assemblies integrating multiple Lee fluid control components for complex system requirements.
- Fill and Drain Valves Valves designed for filling and draining fluid systems during maintenance and system initialization.
Quantifiable outcome
- Over 100 million Lee Plugs have been used on aircraft, missiles, spacecraft, and other sophisticated hydraulic systems requiring a permanent leak-tight seal
- +3 more outcomes
Companies that use The Lee Company
Customer profileNamed customers2 records
Segments9 records
Ideal customer profiles6 records
The Lee Company technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
The Lee Company partnerships and signals
Strategic signalPartnerships
15 partnerships are on record, tiered core and regional.
- Lee Products LimitedcoreWholly-owned subsidiary established in 1975, providing direct local sales and technical support to customers in the United Kingdom and Ireland. Maintains a sales force of graduate engineers.
- Lee Company S.A.coreWholly-owned subsidiary commercializing Lee products and providing technical support to customers in France, French-Speaking Switzerland, Spain, Portugal, and North Africa. Maintains a team of sales engineers.
- Lee Hydraulische Miniaturkomponenten GmbHcoreWholly-owned subsidiary established in 1979, providing direct local sales and technical support to customers in Germany, German-Speaking Switzerland, Poland, Czech Republic, Slovakia, Austria, Hungary, and Turkey. Maintains a sales team of technical sales engineers.
- Lee SRL (Italy)coreWholly-owned subsidiary founded in 1994, providing local sales and technical support to customers in Italy, Italian-Speaking Switzerland, and the Balkans. Technical sales engineers work directly with customers.
- The Lee Company Scandinavia ABcoreWholly-owned subsidiary providing local sales and technical support to customers in Sweden, Finland, Norway, Denmark, Ukraine, Estonia, Latvia, and Lithuania.
- Jupitor CorporationregionalDistributor for Japan providing local sales and technical support for Lee products in the Japanese market.
- MinSung GCregionalDistributor for Korea providing local sales and technical support for Lee products in the South Korean market.
- EBS Flow Control Ltd.regionalDistributor for People's Republic of China and Hong Kong providing local sales and technical support for Lee products.
- Windarc Technology Co., Ltd.regionalDistributor for Taiwan providing local sales and technical support for Lee products in the Taiwanese market.
- ENL Engineering and Logistics Ltd.regionalAgent for Israel providing local sales and technical support for Lee products in the Israeli market.
- Hind Industrial and Mercantile Corp. Pvt. Ltd.regionalAgent for India providing local sales and technical support for Lee products in the Indian market.
- Winova Pte. Ltd.regionalDistributor for Singapore and Southeast Asia providing local sales and technical support for Lee products.
- CGB Precision Products Pty. Ltd.regionalDistributor for Australia and New Zealand providing local sales and technical support for Lee products in the Australian and New Zealand markets.
- Denis de Ploeg BVregionalDistributor for Belgium, Netherlands, and Luxemburg providing local sales and technical support for Lee products.
- Trusty Comércio e Representações Ltda.regionalAgent for South America providing local sales and technical support for Lee products in the Brazilian and broader South American market.
Scale indicators5 records
Recent moves6 records
Expansion highlights6 records
The Lee Company competitors and assessment
Company assessmentBroad incumbents
- Honeywell International: Honeywell's aerospace segment designs and manufactures flight control, propulsion, fuel, and thermal management systems — including valves, pumps, and fluid control components — that compete with Lee across many of the same aircraft platform applications.
- CIRCOR International: CIRCOR manufactures flow control products for industrial, aerospace, and defense markets, including valves, pumps, and engineered fluid handling solutions. It overlaps with Lee in precision valves and pumps but spans a broader product set and larger customer base.
- TransDigm Group: TransDigm acquires and operates niche aerospace component manufacturers with proprietary, sole-source content, including fluid and motion control products. Its portfolio of high-margin aerospace fluid components competes with Lee for similar aerospace and defense sockets.
- Curtiss-Wright Corporation: Curtiss-Wright provides engineered products, systems, and services for defense, commercial and industrial markets, including fluid control and motion control components for aerospace and naval applications. It overlaps with Lee in mission-critical aerospace fluid components.
- IDEX Corporation: IDEX is a diversified fluidics company with operating companies in pumps, valves, dispensing equipment, and fluid handling serving industrial, life sciences, and aerospace markets. Several IDEX businesses compete directly with Lee in miniature fluid components and dispense pumps.
- Parker Hannifin: Parker Hannifin is a global motion and control leader offering an extensive portfolio of hydraulic, pneumatic, and fluid control components, systems, and services across aerospace, industrial, and mobile markets. It competes with Lee on valves and pumps but at vastly greater scale and with broader system-level offerings.
Direct peers
- Stäubli Fluid Connectors: Stäubli designs and produces quick-release couplings, multi-coupling plates, and connection systems for fluids and gases, with strong penetration in aerospace, robotics, and industrial markets. It is directly comparable to Lee's quick-connect and high-pressure fluid interface portfolio.
- Sun Hydraulics (Helios Technologies): Helios Technologies, through Sun Hydraulics, manufactures screw-in hydraulic cartridge valves, manifolds, and integrated packages for mobile and industrial hydraulic systems. It competes with Lee on precision hydraulic valves and custom manifold assemblies for mission-critical applications.
- Moog Inc. Moog designs and manufactures precision motion control products and systems, including fluid control valves, pumps, and servo components for aerospace, defense, and industrial customers. Like Lee, Moog serves mission-critical applications with engineered solutions and engineer-to-engineer support.
- Velan Inc. Velan is a leading manufacturer of industrial valves, including severe-service and high-pressure valves for oil & gas, power, and chemical processing. It overlaps with Lee's pressure relief, check, and shut-off valve offerings in heavy industrial applications.
Market position
Strengths1 record
Weaknesses1 record
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
The Lee Company social profiles
Digital presenceThe Lee Company financial estimates
Financial estimateRevenue estimate
Valuation estimate
The Lee Company leadership team
Management profileNumber of profiles
Profiles6 records
The Lee Company subsidiaries and ownership
Company hierarchySubsidiaries5 records
The Lee Company funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
The Lee Company M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about The Lee Company
What does The Lee Company do?
The Lee Company manufactures and sells miniature precision fluid control components and systems — including expansion plugs, check valves, pressure relief valves, shuttle valves, flow restrictors, flow metering valves, shut-off valves, solenoid valves, nozzles, safety screen filters, pumps, manifolds, and fill and drain valves — for mission-critical applications in aerospace, defense, space, medical equipment, automotive, oil and gas, power generation, motorsports, data centers, and scientific instruments. The company offers both standard off-the-shelf products and custom-engineered solutions, with every unit subjected to 100% performance testing.
Is The Lee Company a public or private company?
The Lee Company is a private company. It is classified as family owned and is currently operating.
When was The Lee Company founded?
The Lee Company was founded in 1948. It employs 1,001 to 5,000 people.
Where is The Lee Company based?
The Lee Company is headquartered in Westbrook, United States, in the North America region.
How does The Lee Company make money?
One revenue line is on record: fluid Control Components and Systems.
Who are The Lee Company's main competitors?
Broad incumbents on record are Honeywell International, CIRCOR International, TransDigm Group, Curtiss-Wright Corporation, IDEX Corporation and Parker Hannifin. Direct peers are Stäubli Fluid Connectors, Sun Hydraulics (Helios Technologies), Moog Inc. and Velan Inc..
Does The Lee Company have an API?
No public API is recorded for The Lee Company.
What industry is The Lee Company in?
The Lee Company's product category is Precision Fluid Control Components. Its primary akta.pro industry code is IMAHAGAC, Pneumatic Components (FRLs, Cylinders, Valves), with a secondary code of IMAHANAC, Specialty & Metering Pumps. Its NAICS code is 332912 and its SIC code is 3823.