R&D, manufacturing, sales and service for diesel engine valves and seat rings. Supplying reliable marine diesel parts to shipyards, ship owners, repair companies and engine makers worldwide
Focused on marine power engines with quality, fast delivery and responsive service
Zhenjiang Jianhai Marine Parts Co., Ltd. is a professional shipbuilding and marine transportation equipment parts manufacturing enterprise that integrates R&D, production, sales and service. Specializing in marine power engines, the company provides OEM-quality, high-value diesel engine parts and solutions to shipyards, repair facilities, shipping companies and engine manufacturers.
Main products: marine engine valves for Zichai, Weichai and other mainstream brands, including medium-speed and low-speed engine valves. Products are covered by an ISO 9001 quality management system, and key components undergo rigorous performance and fatigue testing to support OEM-level compatibility.
Marine engine intake and exhaust valves are core diesel engine valve-train components, controlling the intake → compression → power → exhaust cycle. Precision-forged heat-resistant alloys provide high-temperature strength, oxidation resistance, corrosion resistance and wear resistance.
Intake and exhaust valves are core components of diesel engine valve trains, affecting power, economy and reliability
Our marine engine intake and exhaust valve seats are precision-forged from high-strength heat-resistant alloy, with excellent high-temperature strength, oxidation resistance, corrosion resistance and wear resistance.
Products are manufactured to marine standards and engine maker requirements, with interchangeability for Zichai, Weichai, Ningdong, Guangchai, MAN and other mainstream models.
Products cover mainstream domestic and international marine engine brands, meeting the requirements of different engine models.
With export capability, we support customized production and export of international-brand engine valves, including OEM branding, drawing-based processing, non-standard customization and batch orders.
Coverage for mainstream domestic and international marine engine brands
Zichai / Weichai / Ningdong / Guangchai / Shaanxi Diesel · MAN B&W · MAN · Wartsila · Daihatsu · Yanmar · Mitsubishi
ISO 9001 certified quality system with performance and fatigue testing for key parts
Selection, materials and customization for marine engine valves, valve seats and valve spindles
We mainly manufacture intake valves, exhaust valves, valve seats and valve spindles for marine diesel engines, covering medium-speed and low-speed engines and a range of domestic and international models.
Send the engine brand, model and part number, or provide a drawing with key dimensions. We will review the specification against available model and technical information.
Yes. We support OEM branding, drawing-based processing, non-standard specifications and batch orders. For custom production, provide the drawing, material or process requirements and order quantity.
Valve seat materials include Cr-Mo, Si-Cr and Ni-Cr series. Valve spindle materials include 4Cr10Si2Mo, 23-8N, SNCRW and NI80A. Quenching, alloy overlay, HVOF, chrome plating or nitriding is selected according to the engine model and operating conditions.
Current coverage includes Zichai, Weichai, Ningdong, Guangchai, Shaanxi Diesel, MAN B&W, MAN, Wärtsilä, Daihatsu, Yanmar and Mitsubishi. See the compatibility section or contact us to verify a specific model.
Production is managed under an ISO 9001 quality system and includes machining, heat treatment and inspection. Key components undergo performance and fatigue testing.
Send the engine brand, model, part number or drawing so we can review the specification and customization requirements
Plant A3-5 and Building B2, Foze Industrial Park, Jurong Development Zone, Jiangsu, China
+86 139 5201 1890 · +86 139 5179 0128 · +86 138 5194 3971
Marine engine valve production · marine parts wholesale and retail · drawing-based customization · OEM cooperation · export trade