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Marine Equipment O-Ring is a precision sealing component designed for marine engines, pumps, valves, compressors, turbochargers and other shipboard machinery. Fitted inside a groove, it prevents leakage of air, oil, water, fuel and other process fluids.
With excellent flexibility, elasticity and stable dimensional performance, our O-rings maintain reliable sealing under pressure, temperature fluctuation, vibration and continuous running. Suitable for both static and dynamic sealing applications, they protect internal components and keep equipment operating steadily.
Please advise equipment model, O-ring dimensions, material grade, working medium, operating temperature, pressure and part number before ordering to verify compatibility.
Marine Engine O-Ring Technical Parameters & Performance
All data below is obtained from standardized factory tests under simulated marine conditions: high pressure, elevated temperature and salt spray environment.
Parameter | Details |
|---|---|
Base material | Imported marine-grade FKM / Viton / NBR rubber |
Forming process | Integral high-temperature compression molding, precision trimming |
Surface treatment | Anti-aging vulcanization, salt spray corrosion resistance treatment |
Pressure resistance | Improved performance vs. standard rubber O-rings |
Thermal & oil fatigue resistance | Enhanced performance vs. conventional marine sealing rings |
Continuous sealing service life | 10,000+ hours under variable marine load conditions |
Dimensional tolerance | ±0.01mm precision control |
In-service leakage failure rate | Below 0.2% |
Custom lead time | 5–12 working days |
Our marine engine O-rings are manufactured via precision compression molding and burr-free micro-finishing. Dimensional accuracy, roundness and compression set & rebound performance fully meet assembly requirements of mainstream marine main and auxiliary engines. Ultra-precise dimension control eliminates uneven fitting gaps during long-term operation under high-pressure fuel and lube oil.
They effectively mitigate typical marine issues: fuel leakage, oil seepage, pressure drop and unstable engine startup on long offshore voyages, sustaining stable sealing for engine fuel, lube and hydraulic systems.
Every batch of marine O-rings undergoes a full set of pre-shipment tests: raw material rubber composition analysis, high-pressure compression sealing test, high-low temperature cycle aging test, marine fuel immersion test and salt spray corrosion test.
Full factory test reports, dimension inspection sheets and sealing performance data are available for each order. Vessel maintenance teams can install and commission directly without secondary testing, cutting inspection costs and improving efficiency during engine overhaul and routine maintenance.
These marine O-rings are critical precision seals for marine main engines, auxiliary engines, fuel pumps, injectors, hydraulic and lubrication systems. They serve as replacement parts for new ship construction, engine overhaul and routine sealing maintenance, reducing vessel downtime caused by seal failure, oil leakage and pressure loss.
Capable of withstanding harsh marine environments including high humidity, salt spray and heavy vibration under varying loads. Widely used on container ships, oil tankers, bulk carriers, tugboats, offshore engineering vessels and platform supply vessels. Compatible with mainstream marine engine brands: MAN B&W, WARTSILA, PIELSTICK, HANSHIN, NIIGATA, SULZER, YANMAR and DAIHATSU.
MAIN ENGINE | MAN B&W | S26MC,L/S35MC,L/S42MC,L/S50MC,L/S60MC,L/S70MC,L/S80MC,L/S90MC,S46MC-C,S50MC-C,S60MC-C,S70MC-C,S80MC-C,S90MC-C,K90MC-C,K98MC-C,K/L45GF(CA),55GF(CA),67GF(CA),80GF(CA),90GF(CA) |
WARTSILA | 6L20,9L20,8L32,R22,R32,L20,L32 | |
PIELSTICK | PC2-2,PC2-5,PC2-5L,PC2-5V,PC2-6,PA4,PA5,PA6 | |
HANSHIN | EL30-44,ELS-35,44,LH-28G,LU24-54,LUN28AR(G),LUS24-58,LF46-58 | |
NIIGATA | 16HS,16X,18CX,19HX,20AX,25BX,25CX,26AFTE,26KGHS,28AFTE,28BX,28KGHS,31EZ,31X,32CLX,34AFTE | |
SULZER | RTA38,RTA48,RTA52,RTA58,RTA62,RTA68,RTA72,RTA76,RTA84,RL(A/B)56,RL(A/B)66,RL(A/B)76, RL(A/B)90,RND68,RND76 | |
AKASAKA | A31,A34,A38,A41,A45,AH25,AH27,AH28,AH30,AH38,AH40,K28,K31,DM28FD,DM38FD,DM40FD,DM51SS | |
MITSUBISHI | UEC33LSE,UEC37LA,UEC45LA,UEC50LS,UEC52LA,UEC52LS,UEC60LS,UET45/75C,UET45/80D, UET52/90D,UET52/105H | |
AUX.ENGINE | MITSUBISHI | S6A,S6B,S6R,S6N,S16N,S16R,S12R,SA2 |
MAN B&W | 16/24,20/27,21/31,23/30,25/33,28/32,32/40,48/60,58/64 | |
YANMAR | HAL,KL,KDL,KFL,RAL,MAL,S165,S185,M200,M220,T220,T240,T260,Z280,N165,N18,N21,N165,N260,N280, N330,NY16,EY18,EY22,EY26,4CHL,6CHL | |
DAIHATSU | DK20,DK26,DK28,DK32,DL16,DL19,DL20,DL22,DL24,DL26,DL28,DL32,DS18,DS19,DS22,DS26,DS28,DS32, DS40,PK14,PK16,PL24,PL26,PS18,PS20,PS22,PS26,PS30 |
Q1: What materials are available for your marine O-rings?
A: We offer three marine-grade material options: imported FKM/Viton, premium NBR and custom composite rubber. Formulated for marine working conditions, these materials deliver outstanding resistance to fuel oil, high temperature, salt spray and aging, ideal for ship engines under continuous high vibration and variable loads.
Q2: Are these O-rings compatible with fuel pumps and mainstream marine engines?
A: Yes. Our precision O-rings are fully compatible with a wide range of fuel pumps. They fit mainstream marine main and auxiliary engines from MAN B&W, Yanmar, Daihatsu, Niigata and other brands. These O-rings serve as direct replacement seals for engine fuel systems, lube oil systems and hydraulic circuits.
Q3: Do your O-rings support ship inspection and come with official certification?
A: Yes. All our marine O-rings are manufactured in accordance with international marine standards and ship survey requirements. Material Test Certificates (MTC) can be provided per batch. Both stock and custom items undergo standardized marine performance testing to support vessel inspection and port clearance worldwide.
Q4: What is the delivery cycle for standard and customized O-rings?
A: Standard in-stock O-rings can be shipped within 5–7 working days after payment confirmation. For non-standard sizes and special custom rubber grades, production lead time is 5–12 working days, with stable delivery and full-process quality control.
Q5: Will products be tested before delivery? Are test reports available?
A: Every batch undergoes strict pre-shipment tests, including raw material composition analysis, high-pressure compression sealing test, temperature cycle aging test, fuel immersion test and salt spray corrosion test. Full factory test reports, dimension inspection sheets and performance documents are supplied with each order, enabling direct installation without secondary testing.
Q6: What is the service life and failure rate of your marine O-rings?
A: Under typical marine variable load conditions, continuous sealing service life reaches 10,000+ hours. Batch pass rate stands at 99.8%, while in-service leakage failure rate remains below 0.2%. It effectively prevents oil seepage, pressure drop and unstable engine operation caused by seal aging.
