Deritend Group Ltd

We are recognised as one of the UK’s leading specialists in maintaining, repairing and replacing business critical industrial equipment, including gearboxes, pumps, motors, fans, electronic controls and pipework systems.

In addition, we are able to offer a comprehensive range of machining, fabrication, metal spraying, condition monitoring, vibration analysis and induction repairs.

Deritend is firmly established as one of the UK’s leading providers of engineering solutions, this includes the repair or replacement of electric motors, pumps, gearboxes, electronic controls and induction equipment.

Our company:

  • Was founded in 1898.
  • Serves more than 3,500 customers in the UK and boasts a blue chip client base that includes some of the largest manufacturers and best-known brands in the world.
  • Is committed to supporting engineering across the UK.
  • Specialises in optimising asset performance, including motors, gearboxes, pumps, machining, induction, condition monitoring and fabrication services.
  • Has developed unrivalled expertise across a diverse range of industry sectors.
  • Operates from facilities across the UK, including Wolverhampton, Luton, West Bromwich and Middlesbrough.
  • Is a people driven business employing over 160 engineering professionals.
  • Is a quality assured organisation that has gained accreditation in BS EN ISO 9001, BS EN ISO 14001 and OHSAS 18001 in addition to Safe Contractor, CHAS and NICEIC approval.
  • Is a proactive member of respected trade associations including:
  1. Electrical Apparatus Service Association (EASA).
  2. Association of Electrical and Mechanical Trades (AEMT).
  3. British Manufacturing Plant Constructors’ Association (BMPCA).
  4. Utilities Vendor Database (UVDB).
  5. The Pump Centre. 

Whatever the requirement, we are perfectly placed to work with customers as a uniquely flexible engineering partner.

Motor Rewinds

Motor Services

We have a vast experience with all makes of electrical motors and can rewind, repair and overhaul motors and generators

Our engineering specialists are familiar with all makes of motor and have extensive motor rewind and motor repair expertise. They can professionally refurbish both low and high voltage models to an exceptionally high standard. Quality replacement motors from leading manufacturers can also be supplied and installed.

Our motor services include:

  • Continuous condition monitoring using thermal imaging and vibration analysis techniques.
  • Proactive maintenance, repair, upgrade and re-engineering for standard metric frame induction motors, LV and HV motors, NS motors, EX and safe area motors, AC/DC brush motors, AC/DC servo motor, alternators, generators, transformers, solenoids, coils and magnets.
  • Efficiency, pre-repair, post repair and cost reduction testing.
  • Ad-hoc and emergency repairs.
  • Energy efficiency refurbishments.
  • Obsolete spare part manufacturing.
  • Full removal, repair and installation service.
  • In-house testing and dynamic balancing.
  • On-site balancing and laser alignment. 

Strategic partnerships have been developed with a number of leading motor manufacturers including WEG, one of the world’s foremost suppliers of motors, drives and associated controls, Crompton Greaves, EXICO, TEC and Menzels. We also supply other leading brands, such as ABB, Siemens and SEW. We also reassuringly comply with the following standards:

  • Electrical Apparatus Service Association (EASA) Codes of Practice.
  • Association of Electrical and Mechanical Trades (AEMT) Codes of practice.
  • QA, ISO and Health and Safety standards.
Motor Rewinds

Pump Repairs

Pump Services

Deritend offer a wide range of pump related services from on-site repair & full efficiency refurbishments to portable & fixed efficiency testing...

Pump repair and system testing

Repairs and Refurbishment

Our extensive range of capabilities include the repair, refurbish and upgrade all makes of pump up to 25 ton in weight including vertical turbine, bore hole, split case, multi-stage and submersible pumps. What’s more, where spares have become obsolete, our team has the ability to manufacture high quality replacement parts. New pumps can also be specified and supplied for any given application and full removal, installation and commissioning support is available.

Portable Efficiency Testing

Deritend are experts in the accurate measurement of pump flow rate and efficiency using conventional & thermodynamic methods with the ability to perform on-site pump efficiency testing on any site around the UK. In tandem, our engineers can also carry out portable vibration analysis to determine mechanical and electrical asset condition


Our Technoflow proposition, a unique 360° approach to reducing your total cost of ownership at pump, station and full network optimisation, has been succesfully deployed across a number of industries and within a number of major UK water utilities, generating significant savings and providing the client with accurate asset and system data against which strategic investment decisions can be made.

As part of this proposition we offer;

  • Full site survey to benchmark your equipment using our GPX index

  • On-site pump efficiency testing (portable &/or fixed)

  • Fully costed proposals with 'bundled' options and recommendationsThese options include;Periodic, on site testing using patented technology

  • Full installation of fixed, real-time pump monitoring systems, with ongoing consultatitve support

  • Complete re-engineered package, capable of bringing the pump back to full OEM specification

  • Ad-hoc and emergency repairs

  • Energy efficiency refurbishments

  • Re-rate and impeller trims 

Strategic partnerships have been developed with hydraulic consultants, SPX Clyde Union, Wilo, Grundfos and Belzona, with Deritend being only one of four Belzona Approved Coating Centres in the UK, and the official coating centre for the Midlands. 

Pump Repairs

Gearbox Repairs

Gearbox Services

Our proven gearbox solutions encompass removal, repair, testing and installation; part manufacturing; laser alignment; condition monitoring and analysis.

Our quality assured gearbox reconditioning and gearbox repair solutions have been proven in countless applications within the mining, power, oil and gas, rail, metals, defence, chemical, food and beverage, water and tunnelling markets.  

We provide the complete bevel, spur, double helical, single helical, worm and wheel gearbox repair and refurbishment, modification and reverse engineering service and are experienced in managing all kind of projects including major turnkey contracts. Our specialists can remove, dismantle and inspect worn or failed gearboxes and provide detailed inspection reports along with quotations.
These reports include photographs, component tolerances, details of any components that have to be replaced and those that can be safely reused, recommended upgrades and an outline of the work that needs to be undertaken. If a gearbox is beyond repair, we can recommend and supply the best possible replacement. All bearings and seals are automatically replaced and we test each gearbox before it leaves our workshop.
Our gearbox services include:

  • Full end-to-end project management.
  • Removal, repair, testing and installation.
  • Manufacturing of obsolete spare parts.
  • Laser alignment.
  • Continuous condition monitoring and endoscope inspections.
  • Noise, vibration and oil integrity analysis.
  • Thermography. 

Strategic partnerships have been developed with many gearbox suppliers across the UK. Our facilities include a lifting capacity of up to 25 tonnes, 250 ton horizontal press, in-house machine shop, paint spray booth and extensive capabilities to rigorously test all gearboxes after they have been repaired. Our gearbox services also reassuringly comply with the following standards:

  • Bureau Veritas 1828.
  • Gear Manufacturing:                      BS EN ISO 9001
Gearbox Repairs

Condition Monitoring

Condition Monitoring

Deritend provides a dedicated range of services to industry, utilising the latest advancements in this specialist field, Deritend's engineers can detect potential defects in plant equipment, prior to their costly failure.

Unlike less experienced providers, Deritend has the resources, expertise and technology to provide effective and proactive condition monitoring solutions to detect the bands of excessive vibration caused by imbalance, misalignment, mechanical looseness or component failure. 

We are able to monitor equipment during normal production operation in order to detect and trend potential equipment failure before it becomes catastrophic, avoiding costly lost production and expensive repair costs. Condition monitoring and vibration analysis can be used across a wide range of applications within plant facilities.

The services we provide include:

  • Vibration analysis of rotating equipment
  • Vibration condition monitoring of plant
  • Thermal surveys of electrical distributions
  • Thermal surveys of electromechanical plant
  • Thermal surveys of electrical control / switchgear
  • Thermal condition monitoring of plant
  • Oil analysis of lubrication systems
  • Oil analysis of electrical insulations
  • Installation of fixed point vibration sensors
  • Online condition-based monitoring

The need for condition monitoring is required to provide a proactive approach to machinery maintenance, to react before machinery fails, preventing machinery failure & therefore reduce costs / impact to customers business.

Condition Monitoring

Induction Services

We manufacture OEM parts; supply and repair coils, power cables, lamination packs, insulation, furnace blocks and other equipment and re-engineer existing installations.

Deritend provides a market-leading range of induction repair and induction service solutions for customers representing the forging, melting, stirring, coating, chemical, extrusion, food & beverage, and heat treatment markets. We can engineer, redesign, improve, test and repair parts and equipment and provide value-adding on-site consultancy where required.  

Our induction services include:

  • Manufacturing a vast selection of parts for OEM customers.
  • Supplying, repairing and refurbishing induction coils and equipment, power cables, lamination packs, insulation boards and materials, precast furnace blocks, capacitors, thermo switches, demineralising crystals, busbars, vessel heaters and water cooled chokes and transformers to original manufacturer standards.
  • Manufacturing equipment such as water cooled coated rails, inconel rails, casting linings 
  • Supply of carbon free hoses, silicon glass coated sleeve and rope, SCRs, end boards and insulation materials.
  • Undertaking re-hosing, chemical flushing and system cleaning of furnace panels and coils.
  • Our test equipment is calibrated to national standards, and we can offer process testing, final testing, insulation testing (IR) and non destructive Rissati/Baker electrical coil testing.
  • Utilising our bespoke vacuum impregnation varnishing process. 

We have established relationships with specialist manufacturers and suppliers including Ambrill, Eldec, IMS, Elmlin, ESSPEE and SIR to provide a convenient single source solution.
Deritend has also invested in cutting edge capabilities that encompass a 20 ton overhead crane, winding capacity of up to 2m diameter x 2.25m in length, a 2m³ curing oven, a 50 ton vertical press, varnish dip tank, acid flush pump, universal milling, asbestos rated vacuum and controlled disposal.

Induction Services

Machine Shop Services

Machine Shop Services

Our machine shop carries out turning, boring, milling, radial drilling, internal and external grinding, internal slotting, equipment manufacture, fabrication and specialist coatings.

Our machine shop capabilities and extensive expertise allow us to carry out a comprehensive range of precision engineering services in-house. As a result, we are able to manufacture, repair and refurbish parts such as pumps, gearboxes, motors and turbine blades to the highest industry standards.  

Our machine shop services include:

  • Precision machining
  • Turning and boring
  • General and CNC milling
  • Radial drilling
  • Internal and external grinding
  • Internal slotting
  • Equipment manufacture and fabrication
  • HVOF, thermal spray, zinc, chrome oxide, aluminium, bronze and tungsten coating and repair to enhance component performance, durability and wear resistance
Machine Shop Services

Fabrication Services

Deritend has the welding and fabrication capabilities to design and manufacture high quality steel structures to customer specifications.

Our skilled steel fabricators have worked extensively across a number of sectors and have successfully completed installations in highly demanding mining, power, oil and gas, rail, metals, defence, chemical, food and beverage, water and road industry environments.

We also have the expertise to engineer aluminium, carbon steel and cast iron fabrications and provide galvanised and powder coated finishes. Where pipework and other fabrications come into contact with drinking water or sewage, we can provide protective Skotchkote coating and concrete lining.
Inspections and servicing can be undertaken to maximise the working life of fabricated installations and any damaged steelwork is repaired to our own exacting standards.
Our fabrication services include:

  • Full bespoke Auto CAD design support.
  • Load and deflection calculations for structural steelwork.
  • Complete end-to-end project management from site survey to installation and commissioning.
  • Unrivalled aftercare and on-site repair. 

Deritend’s fabrication facilities include a 10 ton overhead crane; MMA, MIG and TIG welding; sheet metal and presswork; sheet, tube and beam rolling; heavy plate profiling and cutting; high definition laser cutting and in-house and on-site load testing. Our fabrications reassuringly comply with the following standards:

  • Fully CE accredited to                 BS EN 1090-1
  • Galvanising:                                  BS EN 1461
  • 3M Skotchkote:                             WIS 4-52-01 BSI Kitemark and DWI Approved.Water Supply (Water Quality) Regulations 1989, Regulation 25 (BS 6920: pt1: 1996)
Fabrication Services

Site Services

Mechanical & Electrical Contracting

Contracting services can be provided to allow our specialists to work on-site at customer locations to deliver cost-effective longer term frameworks or contract support.

Deritend’s mechanical contracting services allow us to provide specialist teams to work on-site at customer locations to deliver cost-effective longer term support under framework agreements or to undertake major one-off and ad-hoc projects.

We have extensive experience in completing M & E framework agreements  which typically involve the cleaning, maintaining, refurbishing and rebuilding of intake pumps, tanks, scraper bridges, slip rings, rotors, mixers, blowers, shafts, bearings and other mechanical equipment. We are M&ECA registered and confidently oversee multi million pound ad-hoc and one-off M & E projects for larger installations.
Our mechanical contracting services include:

  • Technical specialists working at customer premises under the control of our UK branches.
  • Highly flexible project management and programme management.
  • Independent certification to maintain technical and regulatory compliance.
  • Comprehensive operational and management support.
  • Regular meetings to evaluate progress against pre-agreed Key Performance Indicators.
  • Proactively reducing the total cost of ownership for mechanical and electrical equipment. 

Deritend is a committed to delivering the very highest standards and adheres strictly to health and safety regulations. In addition, our Toolbox Talks, site inductions, regular team briefings and safety inspections help to ensure that all employees work safely on-site with the required professional training and qualifications which can include: 

  • IOSH Managing Safely.
  • IPAF.
  • Appointed Person
  • Asbestos awareness.
  • PASMA.
  • COSHH Management.
  • EUSR.
  • Passport to Safety.
  • Confined Space (City & Guilds).
  • Abrasive Wheels. Forklift Operator License.
  • First Aid.
  • Overhead Crane Operator.
  • CSCS.
  • Working at Heights awareness.
  • SSSTS.
  • SAP.
  • Slinger/Signaller.
  • Certified welders
Site Services

Special Projects

Special Projects

We can work with you to create and develop prototype electric motors, providing technical assistance and full development support

As part of our motor services, we can work in partnership with you to provide technical assistance on new development projects through initial concept to prototyping through to production.


Our partnerships have seen us work on fully electric vehicles, the oil and gas industry, Formula 1 KERS Systems, vessel propulsion, free piston generators and gas turbine electric starters. 

We have an extensive knowledge of motor winding and building to initially prototype a concept, and then evaluate the ability to turn it into a fully functioning motor unit, then advance to a production stage. We also carry a standard operations process with every prototype project, with all projects undergoing extensive testing using the latest test equipment before moving into a production stage.

All work is carried out in a sterile workshop with a secure entry system to keep your work confidential, with all of our prototype projects segregated from the rest of the works. We are able to adapt the workshop to suit your needs and the requirements of the project.

Non-disclosure agreements are a large part of the way we operate, and we pride ourselves on maintaining that confidentiality between ourselves and our clients.

Special Projects

Deritend Group Ltd Overview