Trelleborg and Schoolhill in pioneering Shah Deniz project

Trelleborg Sealing Solutions has produced an innovative seal for a valve design by Schoolhill Engineering for BP’s Shah Deniz field. The pioneering high flow, high integrity, safety critical subsea quick exhaust valve (QEV), believed to be the first of its kind, has been created for a subsea high integrity pressure protection system (HIPPS) at the South Caspian Sea site.

The QEV has a 30-year design life with a valve qualification water depth range of 3000 m, a safety integrity level (SIL) rating of SIL3 with 23 000 accumulated cycles, and a volume flow rate of 260 l per minute. The device has been designed to ensure quick and safe emergency shutdowns on the ocean bed.

Global Lead Group Director Oil and Gas for Trelleborg Sealing Solutions, David Brown, said: “Oil and gas exploration in hostile deepwater environments is demanding industry partners to continuously push the barriers of science in the pursuit of reliable and robust equipment.”

Schoolhill Hydraulic Engineering Director, Ronald Whyte, added: “We are forward looking and believe that the step change provided by HIPPS for the oil and gas industry, will see many more operators going along this road. We believe this valve has a great future, which would not have been possible without the technical support provided by Trelleborg.”

Edited from press release by

Published on 25/08/2015

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