Halyard

What Halyard does

Halyard (M&I) Limited is a UK-based specialist marine engineering company founded in 1979 and headquartered in Wimborne, Dorset. The company designs and manufactures marine exhaust systems and related engineered technical solutions that manage engine noise, smoke, vibration, and exhaust emissions for commercial vessels and yachts. The proprietary product portfolio spans water-cooled and dry exhaust systems, GRP and dry silencers, water separators, the Exhaust Alert temperature monitoring system, DPF and SCR aftertreatment packages (IMO Tier III / Stage V compliant), thermal insulation jackets, exhaust hoses and bellows (including the HalFlex range), sprayheads, risers, GRP tube and connectors, and bespoke acoustic enclosures for generators and auxiliary power packs. Manufacturing is conducted in-house, covering composite production (filament winding, wet layup, moulded forms), metal fabrication in stainless and corrosion-resistant alloys, hose and bellows production, and assembly of aftertreatment systems.

The company operates a hybrid go-to-market model. Direct technical sales cover large yacht builders, commercial vessel builders, repair yards, management companies, and OEM engine manufacturers; a global network of 28+ dealers and distributors, plus 2 agents spanning Europe, Scandinavia, Asia, South Pacific, the Middle East, and Africa, addresses retail customers, independent engineers, local chandlers, and smaller builders. Two primary customer segments are served — Commercial Vessels (windfarm support, pilot boats, ferries, oilfield support, military, search & rescue, fishing/aquaculture) and the Yacht Market (motor and sailing yachts up to the largest superyachts). Beyond manufactured exhaust systems, Halyard distributes complementary product lines from Seatorque (shaft systems), AdvanTec/Freeman/Steelhead (hatches, doors, cranes), Aquadrive (antivibration, recently terminated in 2026), Ucalsa (doors and hatches), Wave (filtration), Siderise (noise insulation), Rubber Design (mounts and bellows), and others, creating a one-stop shop. Pricing is bespoke and quote-based, not publicly disclosed, and the business is privately held with no identified institutional or venture investor; ownership changed in 2011 with no further disclosure.

Name

Halyard

Legal name

Halyard (M&I) Limited

Website

https://halyard.eu.com

Company type

Private

Founded year

1979

Operating status

Operating

Headcount range

51–100 employees

Short description

Halyard (M&I) Limited, founded in 1979 in the UK, designs and manufactures marine exhaust systems and engineered technical solutions for commercial vessels and the global yacht market, distributing a complementary product portfolio through direct technical sales and a network of 28+ dealers worldwide.

Ownership category

akta.pro rank

Product category

Marine Exhaust Systems

NAICS

Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Ship and Boat Building (33661)

SIC

Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564), Special Industry Machinery, Nec (3559)

akta.pro primary industry

Piping, Valves & Pumps (Deck/Service Systems Components) (IMAJAIAI)

akta.pro secondary industries

Environmental, Waste & Emissions Control Systems (Wastewater, VOC Capture, Spill Response) (IMAJALAK), Marine HVAC, Refrigeration & Ventilation Systems (IMAJAIAE)

Keywords

• Marine exhaust systems
• Engine silencers
• Marine aftertreatment
• Vessel emissions control
• Marine engineering equipment

Headquarters

HQ city

Wimborne

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Marine Exhaust Systems and Components: One-time product sales of complete exhaust systems and individual components (sprayheads, silencers, separators, hose, bellows, connectors) for new builds and refits. Revenue is project-based with varying deal sizes depending on vessel requirements.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Halyard designs, manufactures, and supplies marine exhaust systems and engineered technical solutions for yachts and commercial vessels. Core offerings include water-cooled and dry exhaust systems, GRP and dry silencers, water separators, DPF/SCR aftertreatment systems for IMO Tier III compliance, exhaust alert monitoring systems, hoses, bellows, thermal insulation, and sprayheads/risers. The company also distributes complementary marine products such as shaft systems, hatches, doors, cranes, antivibration mounts, and filtration systems through a global dealer and direct sales network.

Product overview

Halyard is a specialist provider of marine exhaust systems and engineered technical solutions, established in 1979. The company designs and manufactures its own exhaust product portfolio in-house while also distributing complementary marine equipment. Core manufactured products include water-cooled and dry exhaust systems, GRP silencers (lift, in-line, dual chamber, combined separator types), dry silencers (reactive, absorptive, critical grade), water separators (moulded and GRP), exhaust alert monitoring systems, DPF and SCR aftertreatment systems for IMO Tier III compliance, thermal insulation jackets, sprayheads, risers, exhaust hoses and bellows (standard, HalFlex, HalFlex-HT high temperature, silicone variants), GRP tube and connectors, fabricated stainless steel manifolds and connectors, and Halyard Acoustic Enclosures for generators and auxiliary power packs. Distributed product lines include Aquadrive antivibration drive systems, Seatorque shaft systems (BOSS, tube style, BOSS-Lite, Duo-BOSS), Freeman Marine cast hatches and watertight doors (multiple series for various duty ratings), Ucalsa custom made doors, hatches and manholes, Steelhead Marine high performance yacht cranes (LW, WD, E, ES, CT series), Wave International filtration systems (bilge, wastewater, drinking water, watermaker, wash/rinse), Noise Insulation Materials (Siderise), and Rubber Design mounts, bellows and penetrations. The company also distributes IMS dry silencers, Xeamos SCR and DPF aftertreatment systems, and Thermal exhaust jackets.

Differentiator

Problem solved

Functional benefit

Products and services

• Water-Cooled Exhaust Systems Complete water-cooled exhaust systems designed and manufactured in-house for marine vessels, suitable for propulsion engines, generators, and auxiliary engines. Includes components such as risers, sprayheads, silencers, separators, and associated hardware.
• Dry Exhaust Systems Dry exhaust system solutions for marine applications where exhaust discharge occurs above the waterline, including dry silencers, reactive and absorptive gas silencers, and complete system supply.
• Water-Cooled GRP Silencers Glass Reinforced Plastic silencers including lift silencers, in-line round and oval body silencers, dual chamber silencers, and combined silencer/separators. Halyard manufactures these in-house using composite manufacturing processes.
• Dry Silencers Dry exhaust silencers including reactive exhaust gas silencers, absorptive exhaust gas silencers, M31 reactive critical grade silencers, M51 critical grade silencers, and FP straight-through absorption silencers.
• Water Separators GRP low profile and general water separators, plus MS4000, MS5000, and MS7000 series moulded water separators for exhaust systems.
• Exhaust Alert System IP67 waterproof temperature switch gauge with visual and audible alerts for monitoring cooling water flow in water-cooled exhaust systems, featuring fail-safe functionality and OEM Control Box for vessel monitoring integration.
• DPF Aftertreatment Systems Diesel Particulate Filter systems for reducing soot emissions, supporting IMO Tier III compliance and suitable for legacy or modern engines.
• SCR Aftertreatment Systems Selective Catalytic Reduction systems for NOx reduction, supporting IMO Tier III compliance as part of certified engine packages.
• Exhaust Hoses and Bellows Exhaust hoses including HalFlex ultra-flexible, HalFlex-HT high temperature, silicone, and wire reinforced silicone variants in sizes from 25-508mm ID; plus silicone flexible bellows. Lloyd's Register type approved.
• Sprayheads and Risers Exhaust sprayheads and dry risers manufactured in-house since 2001 Sabre Fabrications acquisition, with replacement exhaust injection elbows and spray rings available.
• Halyard Acoustic Enclosures Custom generator enclosures and acoustic enclosures for auxiliary power packs, designed to reduce noise from marine equipment.
• Low-Cost Moulded Silencer Range Lower-cost moulded silencer range launched in 2023 to broaden access to Halyard's GRP silencer technology across smaller vessel and standard commercial applications.
• Thermal Insulation Jackets Thermal jackets and Hot Lag products for exhaust system thermal management.
• Fabricated Manifolds and Connectors 316L stainless steel deck drain manifolds, branch connectors, Y connectors, and in-line reducers fabricated in-house.
• Seatorque Shaft Systems STM3 enclosed bolt-on-shaft system (BOSS), ST series tube style system, MX1 BOSS-Lite, and MX2 Duo-BOSS shaft systems for marine propulsion. Distributed product with OEM factory-trained support.
• Freeman Marine Hatches and Doors Cast hatches (oval, round, rectangular/square) and watertight doors including premium duty, commercial heavy duty, standard duty weathertight, heavy duty weathertight, sliding weathertight, and quick ship options.
• Steelhead Marine Yacht Cranes LW series (LW250, LW350), WD series (WD600, WD800, WD1000), E series, ES series, and CT series high performance yacht lifting equipment and cranes.
• Ucalsa Doors, Hatches and Manholes

Quantifiable outcome

• IMO Tier III emissions compliance achievable with DPF and SCR aftertreatment systems
• +1 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature7 records

Partnerships

Twelve partnerships are on record, tiered core and minor.

• EminoxcoreStrategic or Co-development Partner · 1 July 2026Strategic collaboration to deliver advanced marine exhaust aftertreatment solutions. Halyard team received in-depth training on Eminox aftertreatment products including Emission Control equipment. Partnership supports fully integrated exhaust system solutions with SCR and DPF technologies for marine projects.
• Walterscheid (Aquadrive Brand Owner)minorChannel Partner/ Reseller/ Distributor · 1 June 2026Halyard ceased representation and distribution of Aquadrive product range with immediate effect. Previously served as UK and Ireland distributor for Aquadrive since 1979. Customers directed to Walterscheid Powertrain Services UK for Aquadrive enquiries.
• C.Quip LimitedminorChannel Partner/ Reseller/ Distributor · 1 May 2026Appointed approved parts reseller in May 2026. C.Quip established in 1987 serves leisure and commercial marine sectors. Offers selected Halyard products via marine equipment website providing additional purchasing route.
• Elite Mechanical PowerminorChannel Partner/ Reseller/ Distributor · 1 May 2026Added to distribution network in Melbourne, Australia in May 2026. Built strong reputation for delivering high-quality equipment solutions and service support. Enhances Halyard's reach and customer support in Australian market.
• Ucalsa Industrial VigocoreChannel Partner/ Reseller/ Distributor · 1 January 2024Appointed UK distributor for Ucalsa industrial Vigo bespoke doors and hatches in 2024. Products include watertight and fire rated doors and hatches.
• IMS (Exhaust Technology)minorChannel Partner/ Reseller/ Distributor · 1 March 2021Appointed exclusive marine distributor for IMS dry exhaust systems, expanding product offerings in dry exhaust category.
• AdvanTec Marine (Freeman Hatches & Steelhead Cranes)coreChannel Partner/ Reseller/ Distributor · 1 January 2021Appointed AdvanTec Marine Distributor for Freeman Hatches & Steelhead Cranes in 2021. Halyard service team are OEM factory trained for installation, service and repairs.
• Rubber DesignminorChannel Partner/ Reseller/ Distributor · 1 January 2021Appointed official partner to Rubber Design in 2021 for mounts, bellows and penetrations.
• SeatorquecoreChannel Partner/ Reseller/ Distributor · 1 January 2019Signed distribution agreement in 2019 adding shaft systems to Halyard product range. Halyard service team are OEM factory trained to offer full support for Seatorque shaft systems.
• EmigreenminorChannel Partner/ Reseller/ Distributor · 1 January 2015Partnership agreed in 2015 allowing Halyard to promote Emigreen SCR and DPF Technology for aftertreatment solutions.
• AP ManagementminorChannel Partner/ Reseller/ DistributorAgent for Netherlands and Germany for projects over 24m.
• Blazer Marine Trading LLCminorChannel Partner/ Reseller/ DistributorAgent for UAE market.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Hug Engineering: Swiss designer and manufacturer of marine exhaust gas cleaning systems (SCR, scrubbers) and aftertreatment solutions. Closest direct competitor to Halyard in IMO Tier III aftertreatment for marine vessels.
• Centek Industries: US-based marine exhaust systems and silencer manufacturer serving sportfishing yachts and megayachts. Direct competitor to Halyard in water-cooled and dry marine exhaust with similar custom-engineering value proposition.
• QMI Marine: US-based specialist in marine exhaust silencers and water separators for sportfishing and commercial vessels. Direct competitor to Halyard across silencer, separator and GRP product categories.

Broad incumbents

• Volvo Penta: Swedish marine engine manufacturer offering integrated exhaust and emissions solutions in the leisure, commercial and IMO Tier III segments. Overlaps with Halyard's yacht and commercial marine focus.
• Wärtsilä: Finnish marine technology major offering engines, integrated exhaust aftertreatment and scrubber solutions. Competes with Halyard via bundled engine-plus-exhaust packages rather than standalone systems.
• Cummins: US-based global engine manufacturer with marine products that include integrated exhaust aftertreatment. Competes for the same vessel platforms that Halyard supplies with standalone exhaust systems.
• Alfa Laval: Swedish industrial equipment major with a marine division offering exhaust gas cleaning systems (PureSOx/PureVent), separators and a broad portfolio that overlaps with Halyard's aftertreatment and silencer scope.
• Caterpillar Marine: US-based marine propulsion engine manufacturer that supplies integrated exhaust and emissions solutions alongside its engines. Displaces Halyard's standalone exhaust content on Caterpillar-powered vessels.

Emerging players

• Eminox: UK-based exhaust aftertreatment specialist with SCR and DPF products. Both a strategic partner to Halyard (July 2026 alliance) and a competing supplier in marine aftertreatment, with overlapping customer segments.
• Soundown Corporation: US-based manufacturer of acoustic and vibration control products for marine and industrial applications. Comparable niche specialist in marine noise/attenuation products and a potential partner/adjacent competitor for Halyard's acoustic enclosure line.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/HalyardLtd
• LinkedInlinkedin.com/company/halyard-m&i-limited
• Facebookfacebook.com/HalyardLtd

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Halyard