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Marine Equipment Mechanical Seal is a precision-engineered sealing component installed in pumps, rotating shafts, and other marine equipment. It prevents the leakage of liquids, lubricating oil, and other fluids along the rotating shaft, helping maintain reliable equipment operation and protect internal components.
Designed for demanding marine applications, the mechanical seal is suitable for seawater pumps, cooling water pumps, fuel oil pumps, lubricating oil systems, hydraulic equipment, marine engines, shipboard machinery, engine overhauls, shipyard repairs, and scheduled maintenance projects. It helps reduce fluid leakage, resist wear and corrosion, maintain stable sealing performance, and extend the service life of the equipment.
Please provide the equipment brand, model, shaft diameter, seal dimensions, medium type, operating temperature, and part number before ordering to confirm compatibility.
HY MARINE 6DK28 mechanical seal is a core precision sealing component specially customized for DAIHATSU 6DK28 series marine auxiliary diesel engines. Adopting composite marine-grade sealing structure with high-purity carbon graphite friction pair, fluororubber elastic body and anti-rust alloy steel framework, this mechanical seal undergoes high-temperature vulcanization, precision lapping and anti-corrosion strengthening treatment. It is professionally adapted to the harsh working conditions of marine auxiliary engines, including long-term continuous operation, shaft high-speed rotation, frequent load changes and marine salt spray vibration. The product features ultra-stable dynamic sealing performance, low friction loss, strong temperature and oil resistance, effectively solving common faults such as shaft end oil leakage, water seepage, pressure loss and abnormal shaft vibration of 6DK28 engines. It is an ideal OEM replacement part for ship daily maintenance and auxiliary engine overhaul, ensuring long-term stable operation of engine lubrication and cooling systems and reducing vessel downtime and operating costs.
All data below is obtained from standardized factory testing under simulated marine auxiliary engine high-speed, high-temperature and salt-spray operating conditions.
Parameter | Details |
Core material | Carbon graphite friction pair + FKM fluororubber + marine alloy steel |
Forming process | Precision integral assembly, high-precision plane lapping |
Core component treatment | High-temperature vulcanization, salt spray anti-corrosion treatment, flat surface super finishing |
High temperature & oil resistance improvement | 55% higher than standard 6DK28 mechanical seals |
Wear & fatigue resistance improvement | 52% higher than ordinary marine mechanical seals |
Continuous sealing service life | 11,000+ hours under marine variable load conditions |
Fitting dimensional tolerance | Within 0.01mm |
Batch qualification rate | 99.7% |
Field leakage failure rate | Below 0.3% |
Certification | CCS Type Approval Certificate |
Custom production cycle | 5-12 working days |
All DAIHATSU 6DK28 marine mechanical seals adopt ultra-precision plane lapping and 5-axis CNC fine machining technology. The friction pair flatness, assembly gap and elastic compression fully comply with DAIHATSU original OEM technical standards. Micro-level precise fit eliminates dynamic gap deviation during high-speed shaft rotation. It maintains stable zero-leakage sealing under long-term high-temperature lubricating oil immersion, pressure fluctuation and marine vibration conditions. Effectively reduces engine lube oil consumption, avoids cooling water leakage and shaft system abnormal wear, and prevents auxiliary engine power drop and shutdown failure during long-distance navigation, ensuring continuous and stable operation of ship power auxiliary systems.
Every batch of 6DK28 mechanical seals completes full pre-delivery professional tests, including raw material composition inspection, high-speed dynamic sealing test, high-temperature oil immersion aging test, salt spray corrosion test and full-size dimensional calibration. Complete official factory test reports, dimensional inspection datasheets and sealing performance test records are provided with each order. Ship repair and maintenance teams can carry out direct installation and commissioning without secondary performance testing, saving inspection labor costs and shortening auxiliary engine maintenance and overhaul cycles.
All 6DK28 marine mechanical seals are equipped with valid CCS Type Approval Certificate, fully complying with international marine industry specifications and ship inspection standards. Both in-stock standard products and customized products adopt unified marine-grade quality control standards, fully meeting global vessel annual inspection and port clearance requirements.
This mechanical seal is exclusively developed for DAIHATSU 6DK28 series marine auxiliary diesel engines, compatible with full-series DK28 model supporting shaft end sealing systems. Widely used in power generation auxiliary engines of container ships, oil tankers, bulk carriers, harbor tugboats and offshore platform supply vessels. Suitable for new ship construction OEM supporting assembly and old ship auxiliary engine routine maintenance, sealing system replacement and engine overhaul. It effectively solves sealing failure caused by long-term high-speed operation and marine environmental erosion, reduces vessel standby downtime caused by auxiliary engine faults, and guarantees stable power supply for ship electrical and hydraulic systems.
Our DAIHATSU 6DK28 marine mechanical seal adopts marine dedicated composite materials, including high wear-resistant carbon graphite friction pair, high-temperature and oil-resistant FKM fluororubber elastic body and anti-rust alloy steel framework. After high-temperature vulcanization and precision finishing treatment, it features excellent high temperature resistance, oil corrosion resistance and anti-aging performance, fully adapting to long-term continuous operation of 6DK28 marine auxiliary engines.
Yes. This mechanical seal is OEM-standard precision replacement part specially tailored for DAIHATSU 6DK28 marine auxiliary engine. All fitting sizes, friction pair precision and compression parameters are completely consistent with original factory specifications, achieving perfect matching and direct installation without modification.
All our 6DK28 marine mechanical seals are equipped with official valid CCS Type Approval Certificate, complying with international marine industry standards and ship inspection specifications. The products can smoothly pass vessel annual inspection, port inspection and ship class audit with zero compliance risk.
Standard in-stock 6DK28 mechanical seals can be shipped within 5–7 working days after payment confirmation. For customized products with special size or performance requirements, the production cycle is 5–12 working days, with stable quality and controllable delivery schedule.
Yes. Every batch of 6DK28 mechanical seals is delivered with full official factory documents, including raw material inspection reports, dynamic sealing test data, high-temperature aging test records and full-size dimensional inspection sheets. Customers can install and debug directly without secondary performance testing to save maintenance time and cost.
Under standard marine variable load and continuous operation conditions, the stable sealing service life reaches 11,000+ hours. The batch qualification rate is up to 99.7%, and the field leakage failure rate is strictly controlled below 0.3%. It effectively avoids common faults such as shaft end oil leakage, water seepage and shaft system wear, reducing long-term ship operation and maintenance costs.
