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The Delivery Valve is an essential component of the marine diesel engine fuel injection pump. It controls the discharge of fuel from the pump and helps maintain stable fuel pressure during the injection process, supporting accurate fuel delivery and reliable engine performance.
Designed for marine engine maintenance and replacement applications, this delivery valve is available for different engine models and specifications.
Please provide the engine model, part number, or product photos to confirm compatibility before ordering.
HY MARINE SA2 Delivery Valve is a precision high-pressure fuel control component exclusively designed for MITSUBISHI SA2 series marine auxiliary diesel engines. Adopting premium high-strength alloy steel and vacuum quenching tempering process, each delivery valve undergoes ultra-precision grinding, high-pressure sealing calibration and anti-fatigue surface treatment. Tailored for marine severe working conditions including long-term continuous ignition, frequent load switching, high-pressure fuel impact and harsh vibration, this delivery valve features ultra-stable fuel pressure control, zero-leakage sealing performance and outstanding pressure resistance. It effectively solves common auxiliary engine faults such as unstable fuel injection, insufficient power, exhaust black smoke, fuel return leakage and difficult startup. As a standard OEM replacement spare part for vessel daily maintenance and auxiliary engine overhaul, it precisely stabilizes fuel injection volume and injection timing, optimizes combustion efficiency, reduces fuel consumption and minimizes ship downtime losses.
All data below is obtained from standardized factory testing under simulated marine high-pressure fuel injection, continuous operation and variable load working conditions.
Parameter | Details |
|---|---|
Base material | High-strength wear-resistant alloy steel, integral forging blank |
Heat treatment process | Vacuum quenching + high-temperature tempering, stress relief treatment |
Surface finishing | Ultra-precision mirror grinding, sealing surface lapping, anti-corrosion passivation |
High-pressure resistance improvement | 45% higher than ordinary standard delivery valves |
Fatigue & sealing durability | 52% higher than conventional marine fuel valve parts |
Continuous working life | 11,800+ hours under marine continuous variable load conditions |
Matching precision tolerance | Within 0.008mm |
Batch qualification rate | 99.7% |
Field operation failure rate | Below 0.3% |
Certification | CCS Type Approval Certificate |
Custom production cycle | 7-15 working days |
HY MARINE SA2 delivery valves adopt 5-axis CNC precision machining and professional fuel valve sealing lapping technology. The valve core roundness, sealing surface flatness, spring matching clearance and pressure relief groove parameters fully comply with MITSUBISHI original OEM standards. Ultra-high precision dimensional control ensures perfect coaxial fit with fuel injection pump assemblies. It maintains stable high-pressure fuel delivery and accurate pressure relief response during long-term continuous operation and frequent load changes. The precise fuel cut-off performance eliminates post-injection fuel dripping, optimizes fuel atomization effect, and effectively reduces carbon deposition, lube oil dilution and fuel waste. It avoids typical auxiliary engine problems including speed fluctuation, unsteady idle operation, power attenuation and black smoke emission during long-distance marine navigation.
Every batch of SA2 delivery valves undergoes complete pre-delivery strict inspection, including raw material hardness and composition testing, high-pressure fuel sealing test, full-size dimensional inspection, fatigue impact test and marine fuel medium long-cycle simulation test. Complete factory test reports, dimension inspection sheets and performance test records are provided with each order. Ship repair and engineering teams can perform direct installation and commissioning without secondary testing, greatly saving inspection costs and shortening auxiliary engine maintenance and overhaul cycles.
All SA2 marine delivery valves hold valid CCS Type Approval Certificates, fully conforming to international marine industry technical specifications and ship inspection standards. Both in-stock standard products and customized parts adopt unified marine-grade quality control standards, fully meeting global vessel inspection, port clearance and ship class audit requirements.
This SA2 delivery valve is specially developed for MITSUBISHI SA2 marine auxiliary diesel engines, also compatible with Mitsubishi S6A, S6B, S6R, S6N, S16N, S16R, S12R series auxiliary engine fuel system matching. Widely applied in power generation auxiliary engines for container ships, oil tankers, bulk carriers, tugboats, offshore platform supply vessels and marine engineering ships. Suitable for new ship supporting assembly and old ship fuel system overhaul, routine maintenance and replacement. It effectively solves fuel system failure caused by aging, sealing failure and wear of delivery valves, ensures stable engine power output, and reduces vessel operating and maintenance costs.
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 |
1. What material is the SA2 delivery valve made of? Our SA2 marine delivery valve adopts high-density marine-grade alloy steel with integral forging molding. Through vacuum quenching tempering and precise sealing surface lapping treatment, it features ultra-high pressure resistance, excellent wear resistance and stable sealing performance, fully adapting to high-pressure fuel injection and long-cycle continuous operation of Mitsubishi SA2 series marine auxiliary engines.
2. Is this SA2 delivery valve 100% OEM compatible? Yes. This delivery valve is a standard OEM-grade precision replacement part tailored for MITSUBISHI SA2 auxiliary engine fuel injection systems. All structural dimensions, sealing tolerance, pressure relief parameters and assembly stroke strictly match the original factory standards. It also supports universal replacement for Mitsubishi S6A/S6B/S6R/S16R series auxiliary engine fuel pump components.
3. Does the SA2 delivery valve have valid marine certification? All HY MARINE SA2 delivery valves are equipped with valid CCS Type Approval Certificate, complying with international marine industry specifications and ship inspection standards. The products can pass ship annual inspection, port inspection and class survey without any compliance issues.
4. What is the delivery cycle for standard and customized SA2 delivery valves? Standard in-stock SA2 delivery valves can be shipped within 7–10 working days after payment confirmation. For customized or specially processed non-standard models, the production cycle is 7–15 working days with stable quality and reliable delivery schedule.
5. Can you provide complete factory test reports? Yes. Each order is delivered with full official factory documents, including raw material inspection reports, high-pressure sealing test data, full-size dimensional inspection records and fatigue performance test reports. Customers can install and use directly without secondary performance testing to save maintenance time and labor cost.
6. What is the service life and failure rate of the SA2 delivery valve? Under standard marine continuous variable load working conditions, the stable service life of the SA2 delivery valve reaches 11,800+ hours. The batch qualification rate is 99.7%, and the field operation failure rate is controlled below 0.3%. It effectively solves common fuel system faults such as fuel leakage, unstable injection, power drop and exhaust black smoke, reducing long-term engine maintenance costs and ship downtime.
