Damaged butterfly valves in critical applications no longer have to result in unplanned downtime, following the development of an in situ emergency sealant technology recently tested by Saudi Aramco.
The Sealant Pressure Injection Reserve Endurance System (SPIRES® , patent pending) mitigates risk of leakage following damage to a butterfly valve’s primary seal caused by abrasive particles. Saudi Aramco’s validation testing provides assurance of its effectiveness prior to wider adoption.
Devised by Severn Leeds, a Severn Glocon Group company, SPIRES® is a progressive technology that overcomes the challenge of resealing damaged valves without a cavity.
The solution incorporates an emergency sealant system as a fundamental design feature of butterfly valves. Should the primary seal fail, a secondary sealant is injected into a runner behind the disc to compensate for any seat leakage when the valve is set to ‘closed’ position. Tests showed that bubble-tight shut-off can be achieved, even if the seat is badly damaged, avoiding the need for unplanned downtime.
Mark Breese, Group Product Development Manager – Butterfly Valves at Severn Glocon Group, explains: “This ground-breaking technology enables damaged butterfly valves to be resealed quickly and efficiently without removal from the line. Once the sealant is deployed, the valve can remain operational until the next period of scheduled maintenance.”
Severn Glocon Group employs more than 800 people worldwide and was awarded the Queen’s Award for Enterprise in International Trade for the second time in 2014.