Castlet Ltd

Castlet Ltd is a privately owned and managed engineering and manufacturing company,


Founded in 1974 and located in the beautiful cathedral city of Lincoln, one of the world's great historic places and birthplace of the tank; Castlet is proud to continue the great engineering legacy. With over 80% of our employees being shareholders, Castlet is truly independent; meaning that we work together as a team to provide the first-class service our customers have come to expect.

Contact Castlet Ltd

  • 01522 876700

  • Monday - Thursday 9am to 5pm & 12pm Friday

  • 14 Crofton Drive, Allenby Road Industrial Estate, Lincoln, LN3 4NR

About Castlet Ltd

Castlet Ltd is a privately owned and managed engineering and manufacturing company, with a 20% share of the world market for the design and manufacture of Electrostatic Precipitator Power Supplies.

In addition, Castlet also specialises in providing engineering solutions for the Aerospace and Defence sectors.

Our Industrial Division’s business includes the design, manufacture, test, installation and commissioning of electrical and controls solutions including SCADA, PLCs, MCC’s, system integration, switchroom containerisation, Instrumentation, and specialist power supplies and controls.

We work with customers both large and small, from Edf, Eon and other utilities, to large OEMs such as Mitsubishi, SPX, Siemens, through to package plant for project management companies, specialist equipment suppliers including Electrostatic Precipitator and Fabric Filter manufacturers, to Ash conveying controls for particulate emission control.

With many hazardous area projects we are experienced in delivering both onshore and offshore high current power supplies and controls for anti-bioufouling, electrochlorination and hydrogen generation facilities, to Zone1 and Zone2 ATEX classifications.

Siemens solutions partnering provides us with another resource and capability, helping us to deliver plant wide solutions across multiple industries.

Our Aerospace Marine and Ground Division is also a world leader, providing high tech electronic solutions such as flight equipments such as sophisticated filtered air supplies (FAS) among others and ground support test equipment such as Battery Chargers and Battery Capacity testers and analysers used on the Eurofighter Typhoon, F35 Lightning II Joint Strike Fighter (JSF), and weapons simulators for the Sting Ray Torpedo and many legacy platforms such as Tornado, Jaguar & Harrier.

We work as a team enjoying excellent communication with our Clients, many of whom have been with us since we started out in 1974 – testimony to our constant commitment to innovation, quality and research and development. As a company, we are dedicated to investment, both in our people and our products and this ethos ensures that at Castlet the customer is always put first.

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