Introducing the New BICERA Sigma Valve Series of Crankcase Explosion Relief Valves


Better. Smaller. Lighter. More Value. And featuring drop-in replacement.

There’s never been a better way to protect the people and property associated with your engine operation.

And, thanks to the comprehensive benefits that the new BICERA Sigma Valve Series of crankcase explosion relief valves offer over your current valves, you’ve never had so many reasons to switch. 

The New BICERA Sigma Valve Series is better than your current valves.

Stringent tests prove that the BICERA Sigma Valve is a better flame arrestor than other valves. Our proprietary technology offers better protection for your staff and equipment. 

Directional Covers for Sigma Valves

Bicera Valve is happy to now offer directional venting covers for the Sigma series of valves for applications that require conformance to the API 618 standards. 

Directional Covers for Sigma Valves

Watch what makes the Bicera Sigma Valve, the best explosion relief valve on the market.

Bicera Sigma Valve Capabilities

Our Tools & Kits page features helpful information about model and part numbers to help you find what you need. 

     See Tools & Kits      



BICERA Valves Produced
Top Engine Manufacturers Using BICERA Valves
Reports of Death, Injury or Engine Room Damage from Crankcase Explosions
Years’ Experience