Our HotJet pump units are ideal for high temperature washdown in hazardous areas on offshore drill rigs, platforms and other facilities where high pressure hot water is required. The units are designed for use in hazardous areas including ATEX Zone I, NORSOK, and IECEx. In our standard units, all equipment is mounted into an enclosed DNV 2.7-3 certified crash frame with secure storage for the high pressure hose, lance, nozzles and power cable.

Standard Unit – Inline Heater
The Inline Heater unit provides rapid water heat-up times and is suitable for all areas where there is a reliable and constant =>1 bar water supply.
Performance: 15 lpm (4 gpm) at 210 bar (3000 psi)
Operating temperature up to 70°C available

Standard Unit – Immersion Heater
The Immersion Heater unit is designed for use where the site water supply is less than 1 bar, or where the supply is intermittent.
Performance: 15 lpm (4 gpm) at 210 bar (3000 psi)
Operating temperature up to 70°C available

Bespoke HotJet Design
In addition to our standard Hotjet units, we design and manufacture bespoke hot water jetting packages to suit our customers’ specific requirements. Bespoke packages have included multi-location washdown on three decks of a platform from a single unit, a two-storey unit to meet platform space constraints, and the inclusion of large, insulated tanks.

Read this case study which describes the bespoke design required to provide our customer with a machine that met their stringent requirements.

Call one of our sales engineers to discuss your application on +44 1905 751790 or email sales@calder.co.uk

  • Internal storage.
  • Lockable stainless steel doors.
  • Clear external view of the control panel.
  • Fork truck slots for manoeuvrability.
  • Wire sling set for overhead lifting.
  • Easy access to hose connections.
  • Rugged crash frame.
  • Clear external view of the pressure gauges.
  • Easy connection to standard 63 amp socket.
  • Easy maintenance access.
  • Clear markings for unit identification.
  • Customer’s colour choice.
  • Exd enclosure


  • Pump start.
  • Pump stop.
  • Heater start.
  • Heater stop.
  • Emergency stop.

Indicator lamps

  • Power on.
  • Pump on.
  • Heater on.
  • Water over temperature Pump on.
  • Motor overload.
  • Pump bearing temperature high.
  • DNV 2.7-3 crash frame. This is the most common choice of our customers. Lighter than a container, but still providing very good protection during transportation and from the elements. Lockable stainless steel doors, and internal storage for the hose, lance, nozzles, and power cable. Supplied with fork-lift slots and lifting set.
  • DNV 2.7-1 container. The ultimate protection with sound attenuation options.
  • DNV 2.7-2 standard. The DNV 2.7-2 standard includes lockable doors when closed with fire resistant seals; integral gas detector; IP56 rated within 1m of doors and louvers; portable fire extinguisher system; power safe in the event of a failure, and externally accessible fuel shut-off valve.
  • Skid. The lightweight option.
  • Skid with environmental enclosure. A combination of lightweight unit with a stainless steel environmental enclosure which also has sound attenuation options.