Hydro Group reaches previously uncharted depths of 650 MSW with approved penetrators

Subsea connectivity specialist Hydro Group is the first engineering firm in the world to offer manned submersible electrical penetrators type-approved for use at a working depth of up to 650 MSW (Metre sea water).

The penetrators, used on diving bell and deck decompression chamber (DDC) systems, recently passed Lloyd's Register testing in line with industry-standard Rules and Regulations for the Construction and Classification of Submersibles and Diving Systems (2016).

Mark Hendry, Head of Technical Support at Hydro Group, said: “These penetrators are the result of client-led feedback on the future requirements of our penetrator ranges, as well as an extensive research, development and testing process.

“With a broad operating window of -40°C to 60°C and working voltages of up to 500V, they are ideal for applications in the most demanding of seawater environments.

“This latest breakthrough means that Hydro Group can meet and exceed current industry depth requirements, due to the increasing trend of employing diving bells and DDCs at more challenging depths than ever before.”

Hydro Group's range of diving bells and DDC penetrators are available in right angle or in-line moulded configurations.

No less than seven diving bell penetrator types are available in various thread sizes, from 1¾” UNF (Unified Fine) to  ½” NPT (National Pipe Thread). A 300V diving bell penetrator is available for the ½” NPT size, with DDC penetrator options including 1” NPT and ¾” NPT.

Samples of each penetrators have undergone rigorous type-tests through the Lloyd's Register Type Approval scheme, and have successfully been certified by the internationally-recognised quality assurance specialist.

Hydro Group's technologically-advanced manufacturing facilities in Aberdeen, Scotland enable the company to engineer a catalogue of bespoke and ‘off-the-shelf' subsea connectivity solutions for defence, oil and gas and renewable energy industry applications.

Late in 2018, Hydro Group's contributions to the defence industry were recognised with a visit from Secretary of State for Defence Gavin Williamson MP to the company's Hydro House headquarters.


Notes to editors:

For further information contact Sofiane Kennouche, Media & Marketing Coordinator at Hydro Group Plc, on or +44 (0)1224 254 268

Photo caption: Please see individual image titles

About Hydro Group:

Hydro Group plc comprises Hydro Bond Engineering Ltd, Hydro Cable Systems Ltd, Hydro Group Asia and Hydro Group Systems Inc. Supplying customers within the Oil & Gas, Renewable Energy, Defence and Aerospace Industries, Hydro Group is the market leader in providing bespoke engineered cable and connector assembly solutions for subsea applications in domestic and international markets.

Building on more than 35 years of proven capability and industry experience, the company has regional offices in Singapore and Florida, USA, as well as a network of business partners available to support its products and services globally.

Hydro Group assists customers from prototype concept through to design, manufacture and project management. Its product range includes umbilical cables, electrical and optical connection systems/assemblies for data, power and signal transmission.

From its state-of-the-art manufacturing facilities in Scotland, Hydro Group develops the complete subsea electrical and optical interconnect package, built to withstand the harshest environmental conditions.

Hydro Group employs more than 100 full time staff worldwide and provides total solutions to a portfolio of prime contractors, major operators, OEMs, defence agencies, defence organisations and the UK MOD.



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