Offshore compression project benefits from Severn’s valve innovation

The valve engineering specialist is supplying 17 highperformance triple offset Butterfly Valves to control seawater in the fire safety system of the platform, located off Trinidad and Tobago.
The bi-directional isolation valves need to achieve repeatable zero leakage and meet stringent fire safety testing standards. In addition, the end user specification requires avoidance of wetted graphite inside the valves.
Triple offset Butterfly Valves are typically constructed with graphite packings, gaskets and laminated metal/graphite seals.
In normal operation this noble material provides good service, but increased risk of galvanic corrosion in seawater applications is an ongoing concern for offshore operators.
Avoiding contact between graphite components and the line media, without compromising fire safety credentials or overall valve performance, presented a significant technical challenge.
To address this, the engineering team devised an innovative adaptation of Severn’s patented Oblique Cone Technology (OCT®). Introducing a hybrid valve seal eradicated the need for graphite, whilst retaining all the inherent advantages of a triple offset valve.
The double-flanged valve bodies are manufactured in aluminium bronze for general seawater resistance, and they also incorporate internal and external anti-blowout protection. This advanced safety feature ensures the shaft cannot blow out, even if all external bolting is accidentally removed.
Simon Walker, Severn’s Technical Authority – Butterfly Valves, led the development process. He says applying a logical, methodical approach helped resolve the application problems:
“Standard, catalogue valve products couldn’t satisfy the specification for these valves, so we were enlisted to solve the issue for our client. However, there is also an enduring industry need to overcome the galvanic corrosion problem. We set out to create a solution that could benefit the entire market, not just a single bespoke application. It was a challenging task, but as we specialise in arduous valve applications, we were wellequipped to handle it. Testing has shown that the technology we developed is both reliable and repeatable, and we’re shipping to the end user one month ahead of schedule.”
Tel: 0845 223 2040
Email: sales@severnglocon.co.uk
Web: www.severnglocon.com
Published in Valve User Magazine Issue 51
Cheshire based Oliver Valvetek Ltd is to be recognised with a prestigious ...
May is always a busy month for the BVAA, with so many events converging, but ...
For over 25 years Moontown Ltd have been acknowledged as a UK seal manufacturer ...
Emerson has introduced the
Read full article
Parker Hannifin, the global leader in motion and control technologies, has ...
What is it? IOGP JIP33 have released a new specification S-729 Specification ...
As a family-run business acting globally, with over 10,200 highly qualified ...
Albion Valves (UK) Ltd, one of the UK’s leading valve suppliers, has ...