Pressure regulators developed for subsea use Pressure Tech

New subsea PRV

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 combination of a pressure reducing valve and a back pressure valve to provide accurate control range with minimal deadband. The pressure reducing portion includes a ‘balanced main valve’ to ensure steady outlet pressure – even with decaying inlet pressure.

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.
Pressure Tech offer a core range or pressure regulators for use on liquid and gas applications, but provide engineered solutions to ensure we provide the exact product solution to our customers’ needs.

Pressure Tech Limited, Tel: 01457 899307

Published in Valve User Magazine Issue 13

Summer 2020 // Issue 53
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