The need for control systems that meet the high performance levels demanded by the dynamic range of valve products within the BEL supply portfolio requires systems that may be required to meet the needs of SIL 3. This includes both elevated and arctic environmental conditions, requiring some form of conditioning to cover the environmental swing between the summer and winter months.
The Hydraulic Power Unit (HPU), Accumulation and Controls all play a very important part in the design and installation of a reliable and safe system. As with all critical systems they need to have the flexibility to carry out partial closure testing, valve condition monitoring and be able to interface with the Distributed Control System (DCS) or HIPPS logic solver as required by the operator. Reliability data must be maintained throughout the life of the product to minimise plant shutdowns.
Control system design depends on multiple assessments to mitigate Risk but a first step is to find a supplier with an established reputation who can provide a fully integrated controls solution. Control systems in some cases need to meet stringent Safety Integrity Level (SIL) requirements, and should not be simplified only to a Probability of Failure on Demand (PFD), because each Installation has a unique set of calculations for Risk Assessment. BEL Valves and Hima-Sella have combined their resources to provide a complete, reliable and robust solution to control systems design by employing a totally co-ordinated in-house design. Our engineers carry out system detailing using the latest CAD software, calculations, validation of workshop build/testing, commissioning and operator training.
