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Product Introduction
Marine diesel engine exhaust valves are core components subjected to extreme thermal stress and corrosive flue gases. Our exhaust valves are manufactured using advanced materials like Nimonic 80A or special heat-resistant alloys to resist high-temperature oxidation and hot corrosion. The valve seat area is often reinforced with Stellite alloy to prevent "cobweb" cracking and pitting caused by heavy fuel oil impurities.
Designed for the harsh environment of ocean-going vessels, these valves ensure stable exhaust flow and consistent sealing under peak combustion temperatures. Compliant with CCS standards, they are the preferred choice for ship owners seeking to reduce engine downtime and maintenance costs.
We supply full-range spare parts for marine main engines, auxiliary engines, oil purifiers, air compressors, turbochargers and other marine equipment. Both genuine original spare parts and high-quality OEM replacement parts are available.
Complete models & sufficient stock, supporting bulk supply for shipyards, ship owners and marine service companies worldwide.
一、MAIN ENGINE
Our company specializes in providing comprehensive spare parts for all the aforementioned brand ship engines, including cylinder liners, pistons, injectors, connecting rods, seals, bearings, oil heads, plungers, and more. We offer both stock availability and customized supply options to meet the maintenance needs of various marine diesel engine systems
Product Advantage
1. Nimonic 80A / Super-Alloy Material, Extreme Heat Resistance
Specifically engineered to withstand 700°C+ exhaust temperatures without deformation or thermal fatigue.
2. Stellite Alloy Welding for Valve Seat
The seat face is reinforced with high-hardness Stellite alloy via plasma welding, improving resistance to hot corrosion and high-pressure impact by 60%.
3. Friction Welding & Precision Grinding
Uses friction welding for superior stem-to-head bonding and 5-axis CNC grinding for a micro-meter fit tolerance (0.008mm).
4. Superior Corrosion Resistance
Optimized for low-quality heavy fuel oil (HFO), resisting sulfur and vanadium erosion common in maritime operations.
5. Reliable Service Life & CCS Certification
Designed for 12,000+ hou
Product Uses
1. Harsh Combustion Environments with Heavy Fuel Oil (HFO) Exhaust valves are specifically engineered to handle the harsh by-products of heavy fuel oil (HFO) combustion in large marine diesel engines. In vessels like VLCCs and large bulkers, the exhaust valves must resist high-temperature corrosion and the buildup of carbon deposits and vanadium/sodium salts. Our exhaust valves, reinforced with Nimonic or Stellite alloys, maintain their sealing integrity even when exposed to 700°C+ corrosive gases. This ensures that the engine maintains its designed power output while protecting downstream components like turbochargers from damage caused by gas blow-by.
2. Engine Overhaul and Life Extension for Aged Fleets During major engine overhauls and routine maintenance of aged ships, replacing worn-out exhaust valves is a standard procedure to restore engine efficiency and safety. These valves are essential for preventing thermal runaway and protecting the cylinder head from excessive heat stress. By providing a reliable barrier against hot gases, our exhaust valves extend the overall service life of the cylinder head assembly and connecting components. This makes them a cost-effective solution for ship owners looking to maintain the reliability of their fleet and comply with strict maritime safety regulations.
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 |
FAQ
Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q2. What is your terms of payment?
A: Usually T/T100% in short delivery, if the delivery is long 50% as deposit, and 50% before delivery.
We'll show you the photos of the products and packages before you pay the balance.
Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU.
Q4. How about your delivery time?
A: Generally, it will take 7 to 10 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8: How do you make our business long-term and good relationship?
A: 1. We keep good quality and competitive price to ensure our customers benefit
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.
