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NEWS

Pressure regulators developed for use subsea. Pressure Tech has worked in partnership with a client based in Milan, Italy, over the past 12 months to develop a combination pressure regulator to operate at depths of 300 metres. The application is for the defence industry and therefore the application details are confidential, but the design criteria required steady outlet pressure under decaying inlet pressure, and protection of the system in case of failure or leakage from the pressure let down. The regulator design incorporates a pressure reducing with a balanced main valve, and back pressure control to provide a fine control range with minimal deadband.

Two pressure regulators have been developed and tested; the COM-540 reduces pressure from 300bar to 200bar, and the COM-301 reduces the pressure further from 200bar down to 25bar or 40bar. All units are preset by Pressure Tech and fitted with anti-tamper devices to ensure only authorised persons can service the regulators. The design includes a sealed spring chamber to ensure the pressure set topside is maintained at the preset values – irrespective of the depth of seawater.

Each regulator is function tested over 20 times to check for repeatability and stability at the specified set range, and externally pressurised to simulate the depth of seawater to 300m.

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