Fluid Control (Circle Seal Controls and U.S. Para Plate Brands)

At its 95,000 ft² facility in Corona, Calif., CIRCOR Aerospace manufactures fluid control products for aerospace and defense applications ranging from discrete component solutions to integrated assemblies. From design and development, to qualification and production, all aspects of a lean and efficient manufacturing process are managed by the CIRCOR project teams.

The Corona facility also conducts most flight qualification testing: a full range of vibration, temperature, and fluid flow that includes fuel, pneumatic, and hydraulic fluids.


  • Motor-operated valves
  • Hydraulic and fuel manifolds
  • Check and relief valves
  • Sample and bleed valves
  • Float and shutoff valves
  • Pressure gauges and regulators
  • Cryogenic valves
  • Automatic drain valves

Actuation and Landing Gear Products (Loud Engineering & Manufacturing Brand)

CIRCOR Aerospace also manufactures actuation and landing gear components at its Corona, Calf. facility and has worked with major airframers, supporting fixed-wing aircraft with landing gear door actuation, nose wheel steering actuation, internal locking, and utility actuation integrated assemblies.


In addition to fluid control, actuation and landing gear components, CIRCOR Aerospace also manufactures DC brushed and brushless motors for the aerospace & defense, Oil & Gas, and industrial sectors.

Motor Products

  • PMDC brush motors
  • BLDC motors
  • Gearmotors
  • Brakemotors
  • Planetary Gear Boxes
  • Limited angle “torquers”
  • Brushless Generators
  • Wound - Field DC motors
  • Select BTP services
  • Custom Engineered Solutions


  • Aircraft fluid, motor, actuation and landing gear component repair
  • Full assembly and hydraulic testing capabilities
  • Product design and design improvement services

Key Platforms

  • Boeing 787/737NG/757/767/777
  • Airbus A320 Family/A330/A350 XWB/A380 and A400M transports
  • Embraer 135/145/170/190
  • Bell helicopters
  • Cessna aircraft
  • Gulfstream aircraft
  • Beechcraft aircraft
  • KC-46A Pegasus Tanker
  • V-22 Osprey
  • CH-47 Chinook
  • C-17 Globemaster
  • C-130 Hercules
  • P-8A Poseidon
  • Global Hawk UAV
  • Littoral combat ships
  • Military ground vehicles CH-47 Chinook
  • CH-46 Sea Knight
  • F-16 Fighting Falcon
  • Complex parts for numerous mature and proven platforms: F‑5, F-15, F-18, F-22, T‑38, KC- 135
  • UH-60 Blackhawk, and MH-60 Seahawk

Quality Certifications

  • ISO 9001:2008 + AS9100C
  • EASA.145.5907
  • FAA/PMA Parts Manufacturing Approval
  • FAA Repair Station #QWCR710X
  • Boeing, Sikorsky, Lockheed Martin, Bell Helicopter,
  • Airbus, Messier-Bugatti-Dowty, and Gulfstream approvals
  • Boeing D6-82479
  • Nadcap Accreditation
  • EASA.145.5907
  • Major OEM Approvals