SIL-Certified Valve Assembly Offers ‘Two Out of Three’ Protection

A new redundant valve manifold (RVM) from Norgren offers a two out of three (2oo3) configuration, meaning if one of the three pneumatic logic circuits should malfunction there are two logic circuits still operational, so critical redundancy is maintained. 

Norgren has integrated its safety integrity level (SIL) certified valves on a single manifold to create the RVM, available in aluminium or stainless steel. The unit eliminates the duplicate piping required to install redundant valve systems. This may save space, simplify installation and reduce potential leak paths. 

The RVM also features visual indicators of valve position and output status so operators monitoring the equipment can see if they need to schedule service during routine maintenance shutdown. The RVM is available with a manual or electrical bypass option so valves can be serviced while the assembly remains online. 

With integral exhaust guards to prevent particle ingress and a temperature range from -67degrees Fahrenheit to 194 degrees Fahrenheit the RVM is suitable for refineries, chemical plants, offshore rigs or any process where valve malfunction cannot be tolerated. 

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