They raise the engine exhuast outlet to increase the gradient on the exhaust system and they have a carefully calibrated range of water spray holes sized to make the water jet into the exhasut gases at full power to maximise the cooling effect.
Many engine manufacturers make a standard spray head for use when a high riser is not needed, If not Halyard can help. We can also produce spray heads with particular spray patterns for installations where cooling is critical.
• Polished surfaces
• Heat protecting jackets can be tailored for each unit