CIRCOR International

What CIRCOR International does

CIRCOR International is a global manufacturer of highly engineered flow control products—pumps, valves, and integrated fluid control systems—for mission-critical and severe-service applications. The company serves aerospace, defense, commercial marine, oil & gas, power generation (fossil, nuclear, hydro), chemical processing, life sciences, and broad industrial markets across more than 100 countries through three operating groups (Aerospace & Defense, Industrial Pumps, Industrial Valves) and 19 legacy brands including Zenith, IMO (founded 1931), Allweiler, Hale Hamilton, Portland Valve, R.G. Laurence, Leslie Controls, and Circle Seal Controls. Approximately 3,500 employees design, manufacture, and service proprietary technologies spanning precision gear metering pumps, three-screw and herringbone gear pumps, high-pressure hydrogen and CNG valves, butterfly valves with electromechanical actuators for naval damage control, and progressing cavity pumps for viscous and abrasive fluids. Manufacturing is conducted under ISO 9001 and IATF 16949 certifications.

The business model is enterprise B2B with custom-quoted pricing based on application specifications; revenue is generated primarily through hardware sales (aerospace and defense components, industrial pumps, industrial valves) plus aftermarket maintenance, repair, and overhaul services and spare parts for the installed base. Go-to-market is sales-led via direct field sales to OEMs, government/defense programs, and industrial operators, augmented by authorized distributor networks and channel partners (notably an expanded global partnership with FDH Defense Aftermarket for defense aftermarket distribution). Customer types include commercial aircraft manufacturers, naval defense programs, power plant operators, oil & gas companies, commercial marine operators, and medical device manufacturers, with vertical segmentation as the primary organizing principle.

CIRCOR International is owned by KKR following a 2023 take-private at approximately $1.6–1.8 billion (acquired via North America Fund XIII), and is currently undergoing active portfolio reshaping. In September 2024, SCF Partners acquired DeltaValve and TapcoEnpro from CIRCOR. In 2025, CIRCOR acquired Swelore Engineering and Hiro Nisha Systems in India (August) and the Herringbone Gear Pump product line from Flowserve (October), while announcing multiple new product launches (Zenith 2K, Allweiler AE-RG Hopper Pump Series, RTK Discharge and Pump Protection Valve). A definitive agreement was reached in May 2026 for Parker Hannifin to acquire the CIRCOR Aerospace segment for $2.55 billion in cash (closing expected H2 2026), with KKR retaining the Naval and Industrial businesses and employees receiving a portion of proceeds as dividends at close. Saif Siddiqui was appointed CEO effective January 26, 2026, succeeding Tony Najjar who moved to Vice Chairman.

Name

CIRCOR International

Legal name

CIRCOR International, Inc.

Website

https://circor.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

CIRCOR International is a global manufacturer of highly engineered pumps, valves, and integrated flow control systems serving aerospace, defense, oil & gas, power generation, marine, chemical, and life sciences markets across 100+ countries through 19 legacy brands and approximately 3,500 employees, currently owned by KKR following a 2023 take-private.

Ownership category

akta.pro rank

Product category

Industrial Flow Control Equipment

NAICS

Pump and Compressor Manufacturing (33391), Industrial Valve Manufacturing (332911), Measuring, Dispensing, and Other Pumping Equipment Manufacturing (333914), Fluid Power Valve and Hose Fitting Manufacturing (332912)

SIC

Pumps & Pumping Equipment (3561)

akta.pro primary industry

Pump & Compressor Packages (Skids, Booster Sets) (IMAHANAG)

akta.pro secondary industries

Pneumatic Components (FRLs, Cylinders, Valves) (IMAHAGAC), Gas Handling Equipment & Storage (Cylinders/Tanks/Valves) (IMAEACAL), Filtration, Condition Monitoring & Fluid Management (Filters, Breathers, Oil Analysis, Cooling) (IMAHAGAL)

Keywords

• Flow control products
• Industrial pumps
• Industrial valves
• Aerospace fluid control
• Severe service valves

Headquarters

HQ city

Burlington

HQ country

United States

HQ region

North America

Offices23 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Aerospace & Defense Products: Sale of fluid control, pneumatic, electromechanical, and actuation components for commercial aerospace and defense markets. CIRCOR Aerospace estimates calendar year 2026 sales of approximately $270 million with adjusted EBITDA margins exceeding 40% before synergies.
2. Industrial Pumps: Sale of pumps including three-screw, gear, twin-screw, centrifugal, and precision metering pumps for chemical processing, power generation, oil & gas, marine, and industrial applications.
3. Industrial Valves: Sale of industrial valves including pressure control valves, stop valves, check valves, safety relief valves, and integrated fluid control systems for various industrial sectors.
4. Aftermarket Services & Parts: Maintenance, repair, and overhaul services, spare parts, and field service support for installed customer base in aerospace, defense, and industrial sectors.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

CIRCOR International manufactures highly engineered flow control products — including pumps, valves, and custom-engineered fluid handling systems — for mission-critical and severe-service applications. The company operates three business groups (Aerospace & Defense, Industrial Pumps, Industrial Valves) and 19 trusted legacy brands (Zenith, IMO, Allweiler, Hale Hamilton, Portland Valve, R.G. Laurence, and others), serving aerospace, defense, power generation, oil & gas, marine, chemical, and life sciences customers across more than 100 countries.

Product overview

CIRCOR International is a global manufacturer of flow control products consisting of three business groups: Aerospace & Defense, Industrial Pumps, and Industrial Valves. The company operates 19 trusted brands including Zenith, IMO, Allweiler, Portland Valve, R.G. Laurence, Hale Hamilton, Circle Seal Controls, Aerodyne Controls, Leslie Controls, and others. CIRCOR's product portfolio centers on mission-critical pumps and valves designed for severe service applications in aerospace, defense, commercial marine, oil and gas, power generation, chemical processing, life sciences, and industrial sectors. The Industrial Pumps group offers centrifugal, three-screw, gear, and progressing cavity pumps under brands like IMO, Allweiler, and Zenith. The Industrial Valves group provides high-pressure valves, butterfly valves, and control valves under brands including Hale Hamilton, Portland Valve, and R.G. Laurence. CIRCOR Aerospace & Defense supplies fluid control components for commercial and defense aerospace applications. CIRCOR operates approximately 3,500 employees across offices in over 100 countries and is currently undergoing ownership changes, with Parker Hannifin's acquisition of CIRCOR Aerospace announced in 2026.

Differentiator

Problem solved

Functional benefit

Brands

• Allweiler: Industrial pumps brand, part of CIRCOR Pumps
• IMO
• Zenith
• Portland Valve
• Hale Hamilton
• R.G. Laurence
• Aerodyne Controls
• Circle Seal Controls
• Leslie Controls
• Warren
• CIRCOR Motors
• CIRCOR Aerospace
• RTK
• Schroedahl
• Tushaco
• Houttuin
• CFT
• CIRCOR Bodet
• CIRCOR Industria

Products and services

• Zenith Precision Metering Pumps High-precision gear metering pumps engineered to handle high-pressure and viscous materials for medical device manufacturing, polymer extrusion, coatings, transdermal adhesives, and suture manufacturing applications.
• ZENITH 2K Precision Gear Pump Metering Systems New line of precision gear pump metering systems for industrial applications requiring exacting fluid handling precision.
• IMO Three-Screw Pumps Rotary positive-displacement three-screw pumps for high-pressure service applications including lubrication, fuel transport, hydraulic elevator service, and power generation. Manufactured under ISO 9001 and IATF 16949 (formerly TS 16946) certifications.
• IMO Crescent Internal Gear Pumps General-purpose crescent internal gear pump designs suitable for lubrication, fuel transport, and burner service applications.
• IMO Herringbone Gear Pumps (GAX, GR, and Gearex Series) Herringbone gear pump product line (GAX, GR, and Gearex Series) for high-viscosity and specialty applications in chemical processing, power generation, and general industry.
• Portland Valve Butterfly Valves with Smart Valve EMA High-performance butterfly valves with electromechanical actuators (EMA) for naval applications including fire protection, water cooling systems, and autonomous damage control of water systems on Navy vessels.
• Hale Hamilton High-Pressure Valves and Systems High-pressure valves and integrated fluid control systems for hydrogen fueling, CNG/biomethane, industrial gases, and hydraulic applications. Includes pressure control valves, stop valves, filtration, and safety relief valves.
• R.G. Laurence On/Off Control Valves On/off control valves with quick opening and tight sealing for applications demanding high temperature and extreme service conditions in power and process industries.
• Allweiler AE-RG Hopper Pump Series Hopper pump series designed for demanding applications including wastewater treatment, dry sludge handling, and biogas processing of highly viscous, abrasive, or solids-laden materials.
• RTK Discharge and Pump Protection Control Valve Discharge and pump protection control valve product for industrial fluid handling systems.
• CIRCORSmart Digital Monitoring Platform Smart monitoring and digital connectivity platform for CIRCOR pump and valve products, enabling remote monitoring and performance tracking across installed equipment bases.
• CIRCOR Aerospace & Defense Fluid Control Components Fluid control, pneumatic, electromechanical, and actuation components for commercial aerospace (civil aircraft, business jets, civil helicopters, commercial space) and defense (naval, military aircraft, tactical systems, defense space, ground support) applications.
• CIRCOR Aftermarket Services and Parts Maintenance, repair, and overhaul (MRO) services, spare parts, and field service support for installed CIRCOR pump and valve equipment in aerospace, defense, and industrial sectors, with regional through-life servicing and 24/7 support.

Quantifiable outcome

• CIRCOR Aerospace projects double-digit sales growth driven by positions on premier aerospace and defense programs
• +1 more outcomes

Named customers6 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered major transaction and core.

• Parker Hannifinmajor transactionStrategic or Co-development Partner · 21 May 2026Parker Hannifin agreed to acquire CIRCOR Aerospace from CIRCOR International and KKR for $2.55 billion in cash (cash-free, debt-free basis). The transaction is expected to close in H2 2026 subject to regulatory approvals. CIRCOR Aerospace will combine with Parker Hannifin to create a larger and more diversified aerospace and defense supplier.
• FDH Defense AftermarketcoreChannel Partner/ Reseller/ Distributor · 13 November 2024FDH Defense Aftermarket expanded its global distribution partnership with CIRCOR Aerospace to include new territories and additional product lines. This partnership extends CIRCOR Aerospace's reach in defense aftermarket services globally.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Flowserve Corporation: Direct competitor in industrial pumps and valves serving oil & gas, power, chemical, and water markets. CIRCOR recently acquired Flowserve's herringbone gear pump product line, underscoring direct product overlap and competitive positioning.
• ITT Inc. Direct peer in highly engineered pumps, valves, and motion control components serving aerospace & defense, industrial, and energy markets with mission-critical severe-service positioning similar to CIRCOR.
• Crane Company: Diversified industrial peer with fluid handling, aerospace & defense, and engineered materials segments; directly comparable in process flow valves and pumps for chemical, energy, and aerospace applications.
• Sulzer Ltd. Swiss-based direct competitor in industrial pumps, agitators, and rotating equipment for oil & gas, power, water, and chemical processing — overlapping heavily with CIRCOR's Industrial Pumps business group.
• Watts Water Technologies: Manufacturer of valves, flow control, and water treatment products with comparable industrial and commercial valve portfolios serving water, plumbing, and HVAC end-markets.
• Mueller Water Products: Direct peer in water and industrial infrastructure valves and flow control products, comparable in severe-service valve applications though primarily focused on water rather than aerospace/defense.

Broad incumbents

• Parker Hannifin Corporation: Large diversified flow control and motion control incumbent that is acquiring CIRCOR Aerospace for $2.55B. Overlaps directly with CIRCOR's aerospace, hydraulic, and industrial fluid control portfolios at scale.
• Emerson Electric Co. Large incumbent with extensive flow control, valves, and process automation portfolio serving oil & gas, chemical, power, and life sciences — overlapping substantially with CIRCOR's industrial segments.
• Baker Hughes Company: Large energy technology incumbent with significant oil & gas and industrial flow control exposure; competes with CIRCOR in upstream, midstream, and downstream fluid handling solutions.

Regional players

• Kirloskar Brothers Limited: Indian pump manufacturer that is a regional competitor to CIRCOR's Allweiler India and newly acquired Swelore/Hiro Nisha operations; comparable in industrial pump offerings for the Indian subcontinent.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/circorint
• YouTubeyoutube.com/user/circorinternational
• LinkedInlinkedin.com/company/circor-international-inc-

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries6 records

Funding overview

Funding rounds1 record

Investors

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

M&A12 records

Investments

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

Frequently asked questions about CIRCOR International