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JOINT RING Marine Engine Spare Parts is a critical core sealing component for marine engine systems. Made of high-quality wear-resistant and corrosion-resistant materials, it provides reliable sealing between mating parts to stop medium leakage and maintain stable pressure inside equipment. It features precise dimensional accuracy, stable structural performance and excellent fatigue resistance, suitable for routine servicing, shipyard overhaul and fault repair under marine harsh working conditions. A well-matched joint ring stabilizes system sealing performance, prevents fluid leakage and operation failure, reduces component failure risks and equipment downtime, and ensures efficient and reliable operation of marine engine units. Please provide equipment model, specifications and part number before ordering to confirm compatibility.
RTA52 Joint Ring | SULZER Main Engine Marine Main Engine Spare Parts
The RTA52 Joint Ring is a precision sealing and connecting spare part exclusively designed for SULZER RTA52 series two-stroke low-speed marine diesel main engines. As a critical mating component installed at engine joint interfaces, it provides reliable positioning, sealing and buffering between adjacent engine assemblies. It blocks oil leakage, gas escape and foreign contaminant ingress while maintaining precise assembly clearance during continuous engine operation. Under cyclic vibration, pressure fluctuation and thermal expansion, the joint ring keeps stable fitting status to protect the mating surfaces. If the joint ring suffers aging, deformation, surface scratch or permanent compression set, it will lead to interface leakage, reduced sealing performance and even gas blow-by, which may cause abnormal engine operation during sea voyage. Replacing with standard RTA52 joint ring restores original assembly sealing effect and guarantees stable running of the main engine.
Working under harsh marine operating conditions including long-term full-load navigation, alternating mechanical vibration, high temperature and salt-fog corrosion, the joint ring will gradually lose elasticity and produce compression deformation after long service hours. Damaged joint rings result in oil seepage, gas leakage and wear of the mating metal surfaces. Regular inspection and replacement of joint rings are essential items for main engine overhaul and dry dock maintenance.
This precision RTA52 joint ring features excellent compression recovery performance and high sealing stability. It can adapt to thermal expansion and contraction of metal components under variable load working conditions, compensating for tiny clearance changes at joint interfaces. It maintains tight contact between mating surfaces to prevent oil and gas leakage under rated working pressure.
With outstanding wear resistance and medium resistance, it can resist erosion from lubricating oil, fuel oil and high-temperature gas inside the engine. It avoids premature aging, cracking and permanent flattening. Reliable sealing performance protects expensive mating metal surfaces from corrosion and abrasion, reduces unplanned downtime and maintenance costs, improving operational safety and long-cycle stability of SULZER RTA52 main engines for ocean-going vessels, bulk carriers and container ships.
This RTA52 dedicated joint ring is manufactured from high-performance composite material, customized for the complex alternating temperature and vibration working environment of SULZER RTA series main engines. The production process adopts precision molding, fine machining and surface treatment to guarantee stable hardness and compression resilience. Strict dimensional tolerance control for outer diameter, inner diameter and cross-section ensures the joint ring meets original design fitting requirements. The whole manufacturing process follows OEM technical requirements and universal marine diesel industry specifications.
Quantified Marine-Grade Performance Parameters
Parameter | Specification | Test & Implementation Standard |
Material | High-performance marine composite | Raw material composition inspection |
Surface Treatment | Fine finishing, anti-oil & anti-corrosion treatment | Medium resistance test |
Dimensional Tolerance | Precision tolerance for ID, OD and cross-section | CMM full dimensional inspection |
Sealing Performance | Low compression set, good rebound performance | Compression rebound endurance test |
Working Temperature Range | High temperature resistance for engine joint area | High temperature aging test |
Service Feature | Oil resistant, wear resistant, anti-aging | Marine environment adaptability test |
Compliance Standard | Universal marine industrial manufacturing specifications | General marine diesel engine industry norms |
All RTA52 joint rings are manufactured strictly in accordance with SULZER OEM engineering drawings and marine sealing component standards. Each joint ring undergoes raw material verification, precision forming, fine machining and surface finishing. Finished products will be tested for dimension, compression rate, rebound performance and medium resistance.
Every finished joint ring passes full pre-delivery inspection. All dimensions and sealing parameters match original specifications, supporting direct drop-in replacement without secondary processing, improving overhaul efficiency and ensuring reliable sealing of engine mating interfaces.
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 |
We supply full-series matching spare parts for SULZER RTA52 main engine overhaul, including sealing rings, gaskets, valve assemblies, piston components, fuel pump spare parts and overhaul kits, offering one-stop procurement solutions for shipyards, shipping companies and marine service suppliers.
Each batch of RTA52 joint rings undergoes full-process inspection and performance screening, including raw material composition analysis, metallographic inspection, dimensional verification, compression rebound test and oil aging test. All inspection records are archived for customer review and dry-dock audit.
Manufactured in strict compliance with universal marine diesel industry norms and SULZER OEM technical specifications. This joint ring meets the demands of routine navigation and vessel overhaul projects, serving as reliable replacement accessories for marine main engines.
Joint Ring is a critical sealing component for SULZER RTA52 main engine joint interfaces. Long-time vibration, high temperature and oil corrosion will cause compression set, aging and surface cracking. Replace the joint ring during major overhaul if oil seepage or gas leakage is found. Installing new standard RTA52 joint ring restores original sealing performance, prevents leakage and protects mating metal surfaces from damage.
Inspect joint rings regularly during routine maintenance. For vessels with long-term heavy-load operation, check for oil seepage and surface aging at engine joints. Timely replacement avoids gradual leakage and secondary abrasion of metal mating surfaces, securing stable and safe vessel operation.
Which engine does this joint ring fit?
This joint ring is specially customized for SULZER RTA52 two-stroke marine diesel main engines, also compatible with multiple mainstream marine main and auxiliary engine models listed above. Please provide complete engine model or original part number for accurate matching confirmation.
What is the delivery time?
Standard RTA52 models are in stock with 7–10 working days fast delivery. Non-standard customized specifications support 7–15 working days production cycle.
Can you provide customized processing services?
Yes, we support OEM customization and non-standard processing according to customer drawings and samples. All customized products undergo full-dimensional inspection and sealing performance testing before shipment.
What is your warranty policy?
12-month warranty for material and manufacturing defects. We provide professional after-sales technical support including installation guidance and fitting verification.
What is the MOQ and export packaging?
MOQ is 1 unit for in-stock products, with favorable bulk discount for fleet batch orders. Standard export packaging adopts anti-rust oil treatment, moisture-proof wrapping and solid plywood crating, adapting to long-distance ocean transportation and overseas storage.
