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2-Stroke Engine Exhaust Valve L.O. Pipes Suppliers

Exhaust valves on large two-stroke crosshead engines are opened hydraulically and need reliable, continuous lubrication. In many installations, a branch of the main engine lubricating-oil circuit feeds a hydraulic power supply for exhaust valve actuation, while the valve closes on an air spring around 7 bars.

That combination makes the exhaust valve L.O. pressure pipes deceptively important spares. They are small-bore, high-stress lines that carry pressurized oil from the hydraulic power supply/distributor to each exhaust valve actuator, operating in a hot, vibrating, cyclic environment. When they fail, the consequences are rarely limited to just a leak - you’re looking at lost actuation integrity, oil spray risk on hot surfaces, and unplanned downtime.

Sourcing 2-Stroke Engine Exhaust Valve L.O. Pipes

For marine buyers, the market splits into two-stroke engine exhaust valve L.O. pipes original makers and competent workshops able to manufacture replacements to an exact spec. The challenge is that these parts are highly engine-specific, and small deviations in geometry, fitting type, or surface condition can significantly reduce service life.

Original engine manufacturers supply the pipe as a defined spare part, and will expect you to order strictly by part number and engine identity. Using the spare parts list reference from the engine manual is the simplest way to avoid confusion and make sure the supplier quotes the exact pipe you need.

Aftermarket 2-stroke engine exhaust valve L.O. pipes suppliers are a practical option for many fleets - especially for older engine models - because many pipes are essentially custom-bent high-pressure lines manufactured to drawings. On Records Marine you’ll see marine parts vendors listing 2-stroke engine exhaust valve hydraulic pipe coverage across all major low-speed engine brands (MAN B&W, Sulzer/WinGD, etc.)

Because each pipe is often custom-bent to order, lead times can range from 4 to 12 weeks or more, depending on workload. OEM sourcing (e.g. direct from MAN or Wartsila) is usually at the long end (10-12+ weeks). Specialized two-stroke engine exhaust valve L.O. pipes fabricators in Asia may deliver faster (4-6 weeks).

Preventing Early Exhaust Valve L.O. Pipe Failures

Early failures after replacing exhaust valve L.O. pressure pipes usually come down to a few repeat issues: the replacement pipe or fittings don’t match the installed routing exactly, the joint makeup is incorrect, the line is left vulnerable to vibration, or the new part introduces defects or contamination that act as crack starters or create hydraulic-side problems.

  • Wrong pipe revision or geometry (forced fit) → Order by spare parts list reference from the engine manual, engine type/serial, cylinder number/side, and include photos of the installed routing and clamp points.
  • Vibration fatigue from missing/incorrect supports → Require the pipe to match original clamp locations and routing, and request tagging per cylinder to prevent swap mistakes.
  • Leaks or cracks at fittings due to incorrect assembly or mismatched components → Specify no mixed fitting systems, supply new sealing elements where applicable, and require the supplier to state the exact fitting type/standard.
  • Bend-zone defects → Request a basic dimensional check and NDT spot-check at bends.
  • Poor cleanliness/preservation (debris inside the line) → Require cleaned/flushed delivery, capped ends, and protected sealing faces.
  • Insufficient pressure integrity verification → Require a proof / hydro test report (commonly ≥1.5× working pressure) with the shipment.
  • Material or certification gaps → Ask for EN 10204 3.1 material certificates for tube and end fittings, and welding qualifications if welded ends are used.

2-Stroke Engine Exhaust Valve L.O. Pipes Suppliers

If you’re looking for the right exhaust valve L.O. pressure pipe for a specific engine and need to confirm part number, routing, and fitting type, an experienced 2-stroke engine exhaust valve L.O. pipes suppliers can guide you through the details before you order. Records Marine was built to help you compare vendors in one place. Start with the list below to find and contact the right supplier.

  • Japan Marine (S) Pte ltd logo

    Year Founded: 2011

    Verified

    Japan Marine (S) Pte ltd

    Verified

    We have listed our Key Strength Equipments as below for easy reference. We are strong in Main engines Aux Engines /Generators Compressors Main Air , Breathing , Refrigeration, Marine Pumps Purifiers /Separator Hatch Cover Spares / Hydraulic spares Electrical Hydraulic Motors Air horns Toilet Vacuum Systems Electrical spares and small components A/C Compressors HVAC system spares Boiler and Incinerators https://jmsgroup.jp/products/

    jmsgroup.jp
    operations@jmsgroup.jp

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • ARPA (Automatic Radar Plotting Aids)

      (177)

    BRAND:

    • Mescomar

    • Nova Werke

    • Fluid Mechanics

    • POPPE + POTTHOFF

    • BELLOS & CO.

      (17)

    CLASS APPROVED:

    • DNV

    WAREHOUSES:

    • Singapore

    • United Arab Emirates

    • Angola

    • Austria

    • Australia (209)

  • ARK MARINE SERVICE INC. logo

    Year Founded: 2004

    Verified

    Verified

    We specialize in providing original equipment supplies, primarily for main and auxiliary engine spares. As a factory-based company, we ensure the best pricing without compromising on quality. Our dedicated logistics team handles all deliveries efficiently, offering competitive rates for air, sea, and courier services.

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • ARPA (Automatic Radar Plotting Aids)

    • AUS (Automatic Unloading Systems)

    • Accommodation Ladder Davits

    • Accomodation Ladders & Gangways

    • Air Compressors

    • Air Driven Motors

    • Air Horns

    • Air Reservoirs

    • Air Starters

    • Alpha Lubrication Systems

    • Anemometers

      (162)

    CLASS APPROVED:

    • ClassNK

    • BV

  • MARINE INDUSTRIAL GROUP LIMITED logo

    Year Founded: 2025

    Verified

    Verified

    SUPPLIER OF OEM , ORIGINAL , OR SECOND HAND OF MARINE PARTS -Marine oil Lubricants -Marine Engines -Pumps -Main Engine -Auxiliary Engine/Generator -Engine Spares -Propeller -Hydraulics -Pumps Spares -Oil Purifier Spares -Heat Exchanger -Air Compressors Spares -Turbo Chargers Spares Marine Industrial Group: Excellence in Marine Solutions With a commitment to superior service and quality products, Marine Industrial Group is your go-to source for marine engineering supplies. We specialize in ship spare parts and auxiliary systems. MIG- Marine Industrial Group Limited

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • ARPA (Automatic Radar Plotting Aids)

    • AUS (Automatic Unloading Systems)

    • Accommodation Ladder Davits

    • Accomodation Ladders & Gangways

    • Air Compressors

    • Air Driven Motors

    • Air Horns

    • Air Reservoirs

    • Air Starters

    • Alpha Lubrication Systems

    • Anemometers

      (166)

    WAREHOUSES:

    • Hong Kong

  • Focus Marine Ltd. logo

    Year Founded: 2020

    RM verified

    RM verified

    We supply marine spare parts as our core business from our reliable partners/makers all over the World. Our parts are equivalent products NON-GENUINE unless otherwise stated. A part of scope of supply mentioned below as per engine types. 5L16/24, 5L21/31, 6L23/30H, 8L23/30, 5L28/32H, 7L32/40, 16V32/40-Non CD 16V32/40-CD, 6S60 MC-C, 7S60MC-C Mk7 6N18AL-V, 6N21AL-SV, 6DK20 TC : TCA66, TCA44, NR34/S148, NR20/R, RH183, TPL67-C33 SPARE PARTS : 2/4 STROKE ENGINE SPARE PARTS - MAN BW MAN SULZER WARTSILA KOBE AKASAKA DAIHATSU YANMAR HANSHIN HIMSEN - CUMMINS TURBOCHARGERS - IHI, MITSUBISHI, MAN, NAPIER, ABB, KBB AIR COMPRESSORS - TANABE, YANMAR, SPERRE, SAUER, TEIKOKU, TAMROTOR SEPARATOR - ALFA LAVAL, WESTFALIA, MITSUBISHI PUMPS - ALLWEILER, NANIWA, DESMI, SHINKO, TEIKOKU, ISHII, SHIN SHIN PHE SPARE PARTS - SWEP, TRANTER, SONDEX, ALFA LAVAL, GEA, APV, HISAKA FILTERS - BOLL KIRCH, MOATTI

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • Air Compressors

    • Air Driven Motors

    • Air Horns

    • Air Starters

    • Alpha Lubrication Systems

    • Automation Control Equipment & Control Units

    • BackWash Filters

    • Boiler Automation Equipment

    • Centrifugal Pumps

      (71)

    BRAND:

    • MITSUBISHI

    • SULZER

    • MAN

    WAREHOUSES:

    • Turkey

    • China

    • Greece

    • Japan

    • South Korea (1)

  • NEW CHANNEL CHINA INTERNATIONAL CO LTD logo

    Year Founded: 2010

    RM verified

    RM verified

    SHIP SPARE PARTS, SHIP EQUIPMENT, ALTERNATIVE SOLUTIONS, SHIP REPAIR, INSPECTION SERVICES, SHIP REPAIR BROKER, OFFSHORE EQUIPMENT, CONSUMERABLES, PROVISIONS, ON-SITE SUPPLY SERVICE PROVIDER, TECHNICAL TEAM FOR ASSISTANCE

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • 15 PPM Monitoring Equipment

    • Accommodation Ladder Davits

    • Accomodation Ladders & Gangways

    • Air Compressors

    • Air Driven Motors

    • Air Horns

    • Air Reservoirs

    • Air Starters

    • AIS (Automatic Identification Systems)

    • Alpha Lubrication Systems

    • AMS (Alarm Monitoring Systems)

    • Anemometers

    • Anti-Heeling Systems

    • ARPA (Automatic Radar Plotting Aids)

      (166)

    CLASS APPROVED:

    • ABS

    • RINA

    • RMRS

    • ClassNK

    • CCS

      (11)

  • Default logo

    Year Founded: 2002

    RM verified

    RM verified

    Our offerings include but not limit: Deck Stores: Various valves and pumps, air vent heads, fire monitor, mooring wire and ropes, hatch cover spare parts, fire door and windows, cabin stores, food and etc. Engine stores: Main and auxiliary engine spares parts, fresh water generator spares parts, air cooler, condenser, heater, air compressor, sewage treatment systems, vacuum toilets, oil-water separators and etc. Electrical stores: Various electrical brands, solenoid valve, pressure transmitter, ceiling lights and etc. Everything you need, please contact us, and we will do our best to supply and offer the best price.

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • Air Compressors

    • Air Driven Motors

    • BWTS (Ballast Water Treatment Systems)

    • Engine Fuel Injection High Pressure Pipes (2-Strok

    • Engines (2-Stroke)

    • Engines (4-Stroke)

    • Engine Starting Systems

    • Exhaust Gas Boilers

    • Exhaust Gas Turbochargers

      (13)

    BRAND:

    • MAN

    • MITSUBISHI

    • SULZER

    CLASS APPROVED:

    • ABS

    • ClassNK

    • CCS

    • BV

    • LR

      (1)

  • OU RUI SEIKO MACHINERY (CHANGZHOU)Co.Ltd logo

    Year Founded: 2022

    Our warehouse/service workshop is located in the Wujin Industrial Park, Changzhou, Jiangsu Province, China. We specialize in marine engine assemblies, spare parts, generator sets, hydraulic pumps, motors, and hydraulic components. We have a team of experienced maintenance service engineers with over thirty years of experience. Our main business includes supplying complete engine parts for CAT, Mak, WARTSILA, and MAN diesel engines, as well as providing comprehensive overhaul and repair services. We look forward to collaborating with you.

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • Boat Engines

    • Diesel Generators

    • Engine Blowers (2-Stroke)

    • Engine Fuel Injection High Pressure Pipes (2-Strok

    • Engine Starting Systems

    • Engines (2-Stroke)

    • Engines (4-Stroke)

    • Exhaust Gas Turbochargers

    • Filter Candles

    • Filters

    • Filtration Systems

    • Fuel Injectors & Fuel Valves

    • Fuel Pumps & Plunger Barrel

    • Gas Engines

    • Gas Turbine Engines

    • High Pressure Fuel Pumps

    • Hydraulic Operation Equipment

    • Hydraulic Pumps

    • Seals for Pumps

  • SEASTAR (HK) TRADE LIMITED logo

    Year Founded: 2018

    providing original spare parts for main engines, auxiliary machinery, engine room equipment, and deck auxiliary systems to domestic and international shipowners and management companies. competitive pricing Our global service network and professional logistics team ensure timely delivery of your spare parts to designated ports and destinations. Heat Exchanger Galley Equipment Electric motor Deck Crane Grab Windlass Mooring Winch Hatch Cover Gangway Ladder Winch Steering Gear Pintle Bush Synthetic Phenol Resin Valve Fire Alarm Detector Navigation Communication Equipment Water Ingress Alarm System Electrical Instrument and Automation Fuel Valve Test Device Main Engine Auxiliary Engine Turbocharger Air Compressor M/E Auxiliary Blower Pumps Boiler Incinerator Fresh Water Generator Oily-water Separator Sewage Water Treatment Plant 15ppm Bilge Alarm Fuel Oil supply Module Purifier Refrigeration and Air Conditioning

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • ARPA (Automatic Radar Plotting Aids)

      (195)

    BRAND:

    • Mescomar

    • Nova Werke

    • Fluid Mechanics

    • POPPE + POTTHOFF

    • BELLOS & CO.

      (17)

    CLASS APPROVED:

    • ABS

    • ClassNK

    • CCS

    • BV

    WAREHOUSES:

    • China

  • Arctic Ship Repair logo

    Year Founded: 2024

    Arctic Ship Repair ensures fast, reliable supply of genuine and OEM marine spare parts worldwide. From critical engine components to deck, electrical, and safety equipment, we source and deliver with precision. Our global network and technical expertise allow us to match exact specifications, ensuring compatibility and class compliance. Whether for planned maintenance or urgent repairs, we minimize downtime with prompt logistics and transparent tracking. Arctic Ship Repairyour trusted partner for dependable spare parts, delivered on time and ready to perform.

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • Accomodation Ladders & Gangways

    • Air Compressors

    • Air Driven Motors

    • Automation Control Equipment & Control Units

    • BWTS (Ballast Water Treatment Systems)

    • BNWAS (Bridge Navigational Watch Alarm Systems)

    • Boat Engines

    • Boiler Automation Equipment

    • Centrifugal Pumps

    • Communication Equipment

    • Compass (Gyro & Magnetic)

      (91)

    WAREHOUSES:

    • Turkey

  • international marine office logo

    Year Founded: 2014

    Welcome to International Marine Office IMO The Integrated Partner for Maritime Offshore Excellence Welcome to International Marine Office IMO, your comprehensive strategic partner providing full-spectrum solutions across the entire maritime and offshore lifecycle. We are a globally recognized force in engineering, construction, and operational support, committed to driving efficiency and sustainability for our clients. International Marine Office IMO, a powerhouse in the global maritime sector, specializing in delivering comprehensive solutions from design to delivery and throughout the operational lifecycle of your vessel. For over than 20 years experience, IMO has been the trusted name for clients demanding reliability, innovation, and integrated service excellence. Our expertise is built upon a foundation of deep technical knowledge across all phases of the marine industry:

    CATEGORIES:

    • Engine Exhaust Valve L.O. High Pressure Pipes (2-S

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • ARPA (Automatic Radar Plotting Aids)

    • AUS (Automatic Unloading Systems)

    • Accommodation Ladder Davits

    • Accomodation Ladders & Gangways

    • Air Compressors

    • Air Driven Motors

    • Air Horns

    • Air Reservoirs

    • Air Starters

    • Alpha Lubrication Systems

    • Anemometers

      (168)

    WAREHOUSES:

    • Egypt