GD Engineering

Retford Road
S80 2PY
United Kingdom

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Today 09:00 AM - 05:30 PM (Open)
Fax: 01909 477902
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CLYDEUNION Pumps - Pumping solutions for a better world
Whilst the name is comparatively recent CLYDEUNION Pumps is one of the most experienced specialised engineering companies in the world. Formed through the acquisition and integration of a series of highly respected pump manufacturers on both sides of the Atlantic, CLYDEUNION Pumps incorporates an accumulation of over 300 years of engineering expertise. 



CLYDEUNION Pumps provides a wide range of superior quality products to customers around the globe. 

The strength of our product ranges lies in the superiority of designs, materials and components that make up our offering. From simple end suction pumps used for clean water duties to main reactor feed pumps for nuclear plants, our customers make severe demands on the equipment used. Our robust designs have a deserved reputation for efficiency, reliability and durability. This durability extends mean time between maintenance, increasing pump availability. 



CLYDEUNION Pumps is committed to providing world class aftermarket support for all current and heritage products via our world-wide network of manufacturing facilities, service centres and approved service providers. No matter where you are in the world we are committed to having a service engineer attend your site within 48hrs of a request.

Service and Aftermarket Support

With more than 40 years experience in the design, manufacture and service of scraper traps for inserting cleaning tools into onshore, offshore and subsea oil/gas pipelines, we have the knowledge, skills and experience to provide first class onshore/offshore inspection and maintenance packages for pipeline pig trap systems. These services include:

  • Maintenance and Refurbishment of Closures and Scraper Signallers
  • Seal Surface Refurbishment and Flange Face Machining
  • Interlock Systems Maintenance, Pig Trap Refurbishment
  • Modification and Trap Extensions
  • NDT Inspection
  • Wall Thickness Checking
  • Full After Sales Service and Spares Backup

Our service and maintenance packages are carried out annually or as and when required by our highly skilled and qualified engineers.

Quick Opening Closure - Bandlock™ 2

GD Bandlock™ 2 closures are designed and manufactured to suit high pressure applications. They provide horizontal and vertical access to any pressure vessel in a matter of seconds and can be operated safely at great speed. More than 20,000 units are in operation worldwide which is a clear indication of their high performance and reliability. They are widely used for applications including: Pipeline Pig Traps, Filters, Coalescers, Strainers, Separators, Meter Skid Systems and Hydrocyclones. Please visit our website to view technical specifications and to download and view our product brochure.

Quick Opening Closure - Rotalock™

The GD Rotalock™ has been expertly designed and manufactured to provide users with a safe, cost-effective solution for low pressure applications. It operates with low pressures to ANSI 300 and diameters from six inches to 14 inches and enables quick access to various vessels in petrochemical, pharmaceutical and chemical process technologies at temperatures ranging from -30 degrees C up to +200 degrees C. The GD Rotalock™ features field weldable hubs, durable seal, secure cap, dual hinging, and is designed in accordance with ASME VIII Div.1.ASME Code Stamp with U-2A partial data report can be furnished as an option.

Non-intrusive Pig Signaller - Hi-T MagAlert

The Hi-T Magalert is a non-intrusive magnetic pig signaller that has been designed and manufactured to detect, signal and log the passage of magnetic pigs at critical points along a pipeline. This unit can be used for both offshore and onshore applications and can log up to 100 events with time and date. It is ATEX compliant and features a fully certified aluminium or 316 stainless steel explosion-proof housing suitable for use in Zone 1, Zone 2 group IIA, IIB and H2 Areas. Other key features include a detection principle, user-friendly display menu/operator interface, and a unique modular design. Please see full technical specifications online.

Multiple Pig Launching (MPL) Systems

Our excellent range of multiple pig launching systems has been designed to suit topside and subsea applications and enable sequential pig launching operation remotely without the need to depressurise the launcher. This is achieved via field-proven pig, stop and bypass (PSB) mechanisms. For topside launchers a Local Control Panel provides the control logic and status monitoring needed to operate the Multiple Pig Launcher system. Signals are relayed to the control room and the LCP enables valve and PSB operations to be performed in local mode (for maintenance) and remotely (for normal pigging operations).

Special Closure Applications

GD Engineering also offers high quality closure solutions suitable for use with a range of industrial and environmental applications where rapid safe access to a pressurised vessel is required. Our talented team uses 3D solid modelling and ANSYS FEA software to design and create outstanding results. The range features: Industrial/ Domestic Waste Treatment Closures, 18inch Diameter Industrial Dry Cleaning Closures, Medical Waste Treatment Closures and High Pressure Test Vessel Closures.

Scraper and Sphere Signalling - Hi-T Pigalert™

The Hi-T Pigalert™ is manufactured to three specifications: ANSI Class 600, ANSI Class 900 and ANSI Class 1500. These models are designed and manufactured for use at temperatures from -20 degrees C up to +200 degrees C. They are straightforward to install and operate and feature a pivotless tumbler mechanism and laminated trigger blade to provide the depth of penetration into the pipeline for a reliable and visible signal with negligible effect on the flow. The Hi-T Pigalert™ carries full Transco (British Gas) approval.


GD Engineering offers a range of online resources including:

  • GD Engineering Product Literature: features a list of GD Engineering product brochures available to download.
  • Product Literature: this website is for our channel partners and enables them to order datasheets, operation manuals and more online.
  • eSales Access: a secured website for our channel partners enabling them to gain access to critical e-business tools. Items available on the site include: order look-up and status, inventory of parts on-hand, product pricing, ability to build quotes and more.



Registration Number: n/a
VAT Number: GB287 3005 97 277
Founded:1 January, 1944 (80 years and 4 months ago)
No of Employees: n/a
Annual Turnover: n/a

Opening Times

Monday 09:00 AM - 05:30 PM
Tuesday 09:00 AM - 05:30 PM
Wednesday 09:00 AM - 05:30 PM
Thursday 09:00 AM - 05:30 PM
Friday 09:00 AM - 05:30 PM
Saturday Closed
Sunday Closed

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