Lightweight Offshore Pumps, Vacuums and Compressors

Our lightweight offshore pumps, vacuums, and compressors are an innovative solution for facilities which have reduced crane lift capacity or limited deck space. We design these units for hazardous area operations including ATEX, NORSOK and IECex.

A unit gross weight of less than 4,500 kg (1,500 kg with our modular options) makes the range truly lightweight. We achieve considerable space saving through the small footprint which benefits most installations. As a result, these units are ideal for a range of offshore decommissioning, fabric maintenance, and well service applications.

Standard and Bespoke Design

In addition to our standard range we have considerable experience in the design of bespoke units. In fact, compact, lightweight offshore pumps designed to suit very specific applications and operating locations are quite common projects for us. Offshore platforms often have limited access and deck space and many of our projects have dealt with these challenging situations.

Sound design, careful component selection and demanding assembly and test procedures are employed by Calder. Thus, the OffshoreLITE range provides operators with the reliability and long service life for which Calder units are known worldwide.

Get in Touch

Talk with us about your requirements +44 1905 751790 or email

Check out this news item detailing a recent order for a modular, lightweight offshore jetting unit.

  • Less than 4,500 kg gross weight.
  • Modular units less than 1,500 kg crane lift.
  • Small footprint.
  • Container certified to ISO 10855-1.
  • ATEX hazardous area rating.
  • Lifting slings.
  • Fork-truck slots.
  • Control panel with external access.
  • External fuel fill (diesel units).
  • Inlet/Outlet manifold.
  • Easy access for maintenance.
  • Lockable access doors.
  • Sound attenuation.
  • Diesel units – up to 70 kW.
  • Electric units – typically 37 kW.
  • Electric units – designed to operate using a standard, 63 amp, 3-phase socket.

Lightweight Offshore Pumps – Project Examples

We always design units to minimise unit weight and footprint whilst ensuring the equipment is easily accessible for maintenance. However, we relish the opportunity to push the boundaries further. Here are some examples of projects we have delivered.

  • Hydraulically driven, high pressure chemical injection package.

    Energy giant Shell required a pump package designed for use in an ATEX Zone 2 hazardous environment. on the deck of an offshore service vessel and offshore platforms. Shell selected a package consisting of a hydraulic power pack and a high pressure pump, both mounted in compact, offshore-certified offshore containers. Each container has good access, is noise attenuated, and has a maximum weight of 4,500 kg. Read the news item.

  • Nuclear reactor emergency boiler feed cooling system.

    Our customer tasked us with the design and build of lightweight, high pressure auxiliary cooling water pump packages capable of being deployed on demand throughout the UK. Read the case study.

  • Small skid footprint well service pump.

    Due to escape routes, platform structural steel and a blast wall, there were severe platform space constraints. Consequently, the size of the standard CRI unit would exceed the available footprint. Read the case study.

  • Modular offshore jetter.

    We designed and built a Zone 2 hazardous area pump unit in a two-piece modular design with each module weighing a maximum of 1,500 kg. One module contained the high pressure pump and the other a diesel engine. Two offshore-certified crash frames house the modules which feature easy location/connection devices.

  • Heliportable well service pump unit.

    With a site inaccessible by road, helicopter lifts were, therefore, necessary. Our customer required a novel solution for this pump unit weighing 14,000 kg. We designed the unit in six sections each weighing less than 3,500 kg. Through good design we achieved an easy and accurate site assembly mechanism.

  • Four air-driven pneumatic chemical injection packages for North Sea platform.

    Working alongside a major EPC, Calder designed and built four multi-pump, air-driven, chemical injection skids for a leading North Sea oil major. The project constraints required each of the four packages to be designed and constructed to fit into existing deck envelopes and work around existing structures. Our engineering team relished the challenge of designing such low-footprint packages to include the large volume of pipework, valves and associated instrumentation required to provide a safe and cost-effective solution.

  • Hazardous area high temperature washdown unit.

    Our customer required a bespoke, high temperature, high pressure pump package with the capacity to clean three platform decks simultaneously. To fit the available deck space, a two-storey construction with access platform ensured a minimum footprint with easy access to components. The unit is operating in the Danish sector of the North Sea. It is NORSOK and Zone II compliant and produces 62 lpm of hot water at 190 bar. The maximum water temperature is 65°C and the minimum continuous running temperature is 55°C.

Container – offshore certified. Maximum protection with the standard features of:

  • Fork-lifts pockets and a 5-leg sling set.
  • Lockable doors.
  • Lockable control and connection panels.
  • Marine spec paint system.
  • Bunding.

and container options which include:

  • Internal maintenance hoist.
  • Nosie attenuation.
  • Internal, hazardous area lighting.
  • Space heater.
  • Gas and fire detection.
  • Fire suppression.

  • Crash Frame – DNC 2.7-3 certified.
  • Skid – the lightest option. For safe area applications.
  • Modular – where weight or access is very limited. These units are easily re-assembled on site.