Marine Exhaust Systems
Halyard will design a system to suit specific needs built to the highest quality using stainless steel high risers, high temperature GRP silencers using Lloyds Approved filament wound components, connected with Halyard’s own Lloyds approved nitrile rubber hose or silicon couplings to provide the ultimate peace of mind.

Using their new patent protected Resonance Silencer, Halyard can even tune their exhausts to remove particular problem frequencies produced by noisy engines.

Reduce structure borne noise and vibration with Aquadrive
All engine vibration travels along the shaft and into the structure of the hull. The Aquadrive CV coupling fits between the engine and the shaft absorbing the vibration and ensuring perfect alignment of the shaft through the stern gland. It allows the use of softer engine mounts, and even removes engine alignment problems.

Halyard has recently launched the latest addition to the Aquadrive family -Aquadrive CV48.

The latest CV size will fill a gap for boats utilising mid range 500-900hp engines. This will provide the perfect solution for cases where systems with the CV42 are too weak and the CV60 too heavy. The new CV48 shaft makes Aquadrive an even more flexible system with the ability to dramatically solve noise and vibration problems for almost any boat from 5hp to 1200hp.

Reduce airborne noise with Halyard noise insulation
Cocoon the engine with Halyard sound insulation and you can reduce airborne noise by 85% and transform the comfort for all on board. The multi-layer construction used in Halyard materials offer the best possible acoustic results in a range of thicknesses which can be accommodated in the tightest engine space, beating simpler materials many times as thick.

Recent developments
Halyard has invested £25,000 in the development of its new water separator which will be moulded using high temperature polypropylene. Water separators are fitted into wet exhaust systems after Halyard’s silencer, which is built to withstand the high temperatures which can occur if the cooling water intake blocks.

The new unit separates the cool gases and water, dramatically reducing noise and back pressure. Water then drains silently away below the waterline with the gas exiting above the waterline.

Developed from Halyard’s existing two inch moulded water separator, the company’s new unit has been specifically created to comply with stringent new emission standards that make it necessary for new marine generators to be manufactured with three inch exhaust outlets.

The new standards affect generators from around 18Kw sold in Europe, which means that most manufacturers will adopt the standard for worldwide sales.

The separator has been tested with generators with raw flow rates of up to 62 litres per minute, being the highest coolant flow of any generator with a three inch exhaust. In time, Halyard will raise the 62 litre limit as practical experience increases.

In addition, fibreglass models of the new separator have been tested extensively against a wide variety of generators to ensure the new design is capable of handling all combinations of gas and water flow.

The new water separator will reduce the cost to the end user by up to 40% against Halyard’s original three inch water separator which was constructed using Glass Reinforced Plastic (GRP).

Halyard (Marine & Industrial) Ltd
Whaddon Business Park
Southampton Road
Whaddon
Nr Salisbury
Wiltshire
SP5 3HF
T: 01722 710922
F: 01722 710975
E: techhelp@halyard.co.uk
W: halyard.eu.com
Contact Name: James Grazebrook