Crankcase Relief Valves for Marine Diesel Engines

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Precise, Light, & Efficient

Diesel engines are a type of internal combustion engine that ignites fuel by injecting it into high-pressure and hot air within a combustion chamber. Like all internal combustion engines, the diesel engine follows a set sequence of events, which can be carried out in either four strokes or two. A stroke refers to the movement of the piston between its extreme positions, and each stroke is completed in one half turn of the crankshaft. 

To protect against explosions within the crankcase, crankcase relief valves or doors are installed, which are designed to reduce pressure and prevent the release of flames. 

Frequently Asked Questions

What is a crankcase relief valve?  

The valves serve the purpose of reducing excessive pressures within the crankcase and preventing flames from escaping. It is important that these valves are self-closing to prevent air from the atmosphere from re-entering the crankcase. 

What is the purpose of a crankcase relief door?    

The crankcase relief doors are installed to safeguard the crankcase from any harm and prevent fresh air from entering. These doors act as spring-loaded valves that will open if there is an increase in pressure within the crankcase.

What causes excessive crankcase pressure?  

Crankcase pressure builds up during the combustion process when burned gases escape the piston rings and enter the crankcase. The motion and velocity of the rotating assembly, which also creates wind resistance, further contributes to the buildup of crankcase pressure. 

What makes the BICERA crankcase relief valve different?

We made the world’s first crankcase relief valve. Our valves align perfectly with the mounting pattern of your existing equipment. And stringent tests prove the BICERA valve works better to protect people and property.

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