Engine valve – precision control for marine and industrial engines
Engine valves are essential components in every combustion engine, ensuring precise control over intake and exhaust processes. Whether in marine engines, gas-powered generators, stationary industrial motors, or locomotive engines, the right engine valve ensures operational efficiency, combustion accuracy, and long service life. Choosing OEM-quality engine valve parts is critical for long-term performance, safety, and cost-efficiency.
Choose from following:
RELAY VALVE - 81521506003 suitable for MAN D engines
Premium Relay Valve for Engine OptimizationDiscover our premium relay valve marked with the comparison number 81521506003. This OEM spare part is specifically designed and suitable for MAN D engines. Weighing 0.99 kg, the relay valve is an essential element for the performance and efficiency of your diesel and gas engines in marine and stationary applications.
RELAY VALVE - 81521506002 suitable for MAN D engines
Efficient Relay Valve Suitable for MAN D EnginesDiscover our relay valve with the comparison number 81521506002, which has been specifically designed to work optimally with MAN D engines. This product represents the highest quality among OEM replacement parts and ensures that your engines operate reliably. By using this comparison number, you can ensure that the relay valve can be seamlessly integrated into your existing system.Durable OEM Replacement Part with RobustnessThe relay valve weighs 1.13 kg and is ideal for demanding applications in marine and stationary technology. As an OEM replacement part, it offers durability and efficiency, allowing you to rely on the flawless performance of your engines. This ensures that all components work harmoniously together and enable smooth operation.
5/2-WAY VALVE - 81521316043 suitable for MAN D engines
Premium 5/2-Way Valve for Your EnginesDiscover our exquisite 5/2-way valve, suitable as an OEM replacement part. With the comparison number 81521316043, it offers the highest quality and reliability for maintenance and repair work. The precise design ensures that your engine runs efficiently and achieves optimal performance.
CHANGEOVER VALVE - 81521316018 suitable for MAN D engines
Flexible Shuttle Valve for Your NeedsDiscover our innovative shuttle valve, comparison number 81521316018, specially designed for the reliable function of engines. This product impresses with a precise fit. Weighing only 0.076 kg, this spare part is extremely efficient, making it ideal for your requirements in marine and stationary applications.
5/2-WAY VALVE - 81521316015 suitable for MAN D engines
Efficient 5/2-way valve for industrial applicationsThe 5/2-way valve with the reference number 81521316015 is a top-quality OEM spare part suitable for a variety of applications in marine and stationary operations. This product combines precise control with high efficiency and is designed to meet the demanding requirements of engines.Suitable for MAN D enginesThis OEM spare part is specifically suitable for MAN D engines. With a lightweight of only 0.18 kg, it offers a powerful solution that ensures reliable functionality. As it is a spare part suitable for MAN D, you can be confident that you will receive high-quality standards and that your engines will perform optimally.
2/2-WAY VALVE - 81521316014 suitable for MAN D engines
Reliable 2/2-way valve for your applications Discover our 2/2-way valve, which corresponds exactly to the comparison number 81521316014. This replacement part has been specifically designed to work optimally with engines in demanding applications. With a weight of only 0.09 kg, it is the perfect product to ensure the functionality of your machines.Optimal performance suitable for MAN D engines The 2/2-way valve is suitable for MAN D engines and meets the highest standards of the manufacturers. By using this replacement part, you significantly improve the efficiency and lifespan of your machines. Rely on the proven quality that our range offers to keep your engines in top condition.
5/2-WAY VALVE - 81521316012 suitable for MAN D engines
Efficient 5/2-Way Valve Discover the 5/2-way valve with the comparison number 81521316012, suitable for MAN D engines. This product is an essential OEM spare part that provides you with reliable performance in marine and stationary applications. Weighing 0.88 kg, it combines thoughtful design with high functionality.Powerful OEM Spare Parts The 5/2-way valve belongs to the category of Valves and ensures optimal operation of your engines. Every OEM spare part we offer undergoes strict quality controls to ensure that it meets the demands of your engines. Rely on the quality of our products, which are designed for durability.
CHANGEOVER VALVE - 81521316008 suitable for MAN D engines
Robust Shuttle Valve: Comparison Number 81521316008Discover the shuttle valve with the comparison number 81521316008, which ensures excellent performance for your engines. This product is suitable for MAN D engines and, with a weight of 0.61 kg, offers reliable functionality designed for durability.
CHANGEOVER VALVE - 81521306111 suitable for MAN D engines
Shuttle Valve Compatible with MAN D Engines – Reliable SolutionThe shuttle valve with the comparison number 81521306111 is a top-notch product specifically designed to optimize the functionality of MAN D engines. This essential OEM spare part plays an important role in pressure control, ensuring smooth operation of your engines in marine and stationary applications. Weighing only 0.1 kg, it highlights user-friendliness and ease of handling.Efficient Functionality for EnginesThis shuttle valve is an indispensable component, compatible with MAN D engines. Thanks to the high precision and quality of OEM spare parts, long-lasting performance of your engines is assured. Rely on this product to optimally support your engines and enhance efficiency.
VALVE - 81521306106 suitable for MAN D engines
First-Class Valve Suitable for MAN D EnginesDiscover our first-class valve, marked with the comparison number 81521306106, specifically developed for MAN D engines. This OEM replacement part combines reliability with technical precision. Weighing 1.15 kg, it is designed for the demanding conditions in marine and stationary applications, as well as for locomotives. Trust in our quality when it comes to replacement parts for engines.Excellent OEM Replacement Parts for the Highest DemandsMOPA Motorparts is a family-owned company in its second generation, specializing in the provision of OEM replacement parts for over 25 years. The comparison number 81521306106 represents a product that meets the high standards of our industry and is tailored to the specific needs of B2B customers. Our location near Cologne/Bonn Airport, just 18 km away, enables quick shipping and excellent accessibility.
NON-RETURN VALVE - SVDVR1-2 suitable for Bosch engines
Reliable Performance with the Non-return Valve SVDVR1-2 The Non-return Valve SVDVR1-2 is an essential product for engines that require reliable functionality. This OEM replacement part impresses with its high quality and is specifically designed to prevent backflows. Weighing 0.245 kg, it is easy to handle and ensures safety and efficiency in critical applications.
NON-RETURN VALVE - SVDVR1-1 suitable for Bosch engines
Non-return valve SVDVR1-1 for high demandsDiscover our non-return valve with the reference number SVDVR1-1, designed specifically for applications where reliability and efficiency are required. This precisely manufactured product belongs to the important group of valves. It is suitable for MAN D engines and offers you the quality you expect from an OEM replacement part.
NON-RETURN VALVE - 81521207000 suitable for MAN D engines
Non-return valve: Your solution for enginesDiscover our non-return valve, which is listed under the comparison number 81521207000. This product belongs to the category of valves and impresses with precise workmanship and reliability. The non-return valve is suitable for MAN D engines and ensures optimal functionality of your engine-driven systems as an OEM replacement part.
NON-RETURN VALVE - 0481014002 suitable for Bosch engines
Non-return valve suitable for MAN D enginesOur non-return valve (comparison number: 0481014002) is the ideal OEM replacement part for your application. This product ensures that engines operate smoothly by preventing unwanted backflows. Weighing 0.245 kg, it is exactly the component you need to optimize the performance of your machines.
NON-RETURN VALVE - 0481014001 suitable for Bosch engines
Reliable Non-return Valve for Your ApplicationsDiscover our non-return valve (comparison number: 0481014001), designed as a premium OEM spare part. This product is specifically compatible with MAN D engines, providing an excellent solution for marine and stationary applications.Technical Details and AdvantagesThe non-return valve weighs only 0.245 kg and is crucial for the optimal performance of your engines. It prevents backflow, which improves engine efficiency. Trust this specifically designed spare part for MAN D engines, which ensures quality and longevity.
NON-RETURN VALVE - 81521206073 suitable for MAN D engines
Reliable Non-return Valve for Efficient SystemsThe non-return valve with the comparison number 81521206073 is an essential OEM spare part that is specifically designed for use in engines. This product belongs to the category of valves and is compatible with MAN D engines. Weighing 0.296 kg, it is both robust and user-friendly, allowing for effortless installation.Quality through OEM StandardsThe quality of the non-return valve reflects the high demands placed on OEM spare parts. With its reliable performance, the product effectively protects your system from backflows and ensures smooth operation of the engines. The comparison number 81521206073 confirms the suitability of the valve for MAN D engines.
NON-RETURN VALVE - 81521206059 suitable for MAN D engines
Non-return valve for MAN D enginesDiscover the non-return valve with the comparison number 81521206059, an essential product specifically designed to support the efficiency of your engines. This non-return valve is an OEM spare part that provides an exact, tailored solution for performance optimization challenges.OEM spare part and its advantagesThe non-return valve is precisely designed for MAN D engines. Unlike aftermarket products, our OEM spare parts ensure that you are working with a product that meets the high standards of the manufacturer. Benefit from the superior quality that only OEM spare parts deliver.
NON-RETURN VALVE - 81521206058 suitable for MAN D engines
Versatile Non-return Valve for EnginesDiscover our non-return valve, the suitable replacement part with the comparison number 81521206058. This product impresses with its high quality and is manufactured as an OEM replacement part to meet the demands for engines in marine and stationary applications.
NON-RETURN VALVE - 81521206053 suitable for MAN D engines
Precise Non-return Valve for Your ApplicationsDiscover the non-return valve with the comparison number 81521206053, an OEM spare part specifically designed to enhance the efficiency of your engines. This product, compatible with MAN D engines, offers excellent quality and reliability. Weighing only 0.225 kg, it combines lightness and robustness, making it ideal for marine and stationary applications as well as for locomotives.Efficient Functionality for Maximum SafetyThe non-return valve plays a crucial role in the safety and functionality of your engines. It ensures that the fluid flow is directed correctly and prevents unwanted backflows. With the comparison number 81521206053, you can be assured that you have chosen a high-precision OEM spare part specifically designed for MAN D engines.
NON-RETURN VALVE - 81521206052 suitable for MAN D engines
Non-return valve: Comparison number 81521206052Discover our non-return valve with the comparison number 81521206052, an essential product for your engines. This non-return valve is an important component used for optimal performance in various engines. Weighing only 0.2 kg, it is lightweight and user-friendly.
VALVE - 81521206047 suitable for MAN D engines
Valve with Comparison Number 81521206047Discover our valve with the comparison number 81521206047, specifically designed to optimally harmonize with compatible MAN D engines. As an OEM spare part, it offers the highest quality and reliability for your applications. Weighing 0.58 kg, this product is the perfect partner for your engines and ensures efficient performance.Product Details: Suitable for MAN D EnginesThis valve is suitable for MAN D engines and belongs to the group of valves. It meets all quality and precision requirements expected from an OEM spare part. By using this spare part, you ensure that your machines are always in optimal condition.
NON-RETURN VALVE - 81521206039 suitable for MAN D engines
Reliable Non-return Valve for Dependable EnginesThe non-return valve with the comparison number 81521206039 is an essential component of your engines. As an OEM replacement part, it ensures reliable functionality in applications suitable for MAN D. This product provides an efficient solution to prevent unwanted backflow of fluids and to secure the performance of your applications.
NON-RETURN VALVE - 81521206037 suitable for MAN D engines
High-performance Non-return Valve for Your ApplicationsDiscover our Non-return valve, comparable to the part number 81521206037. This OEM spare part is the ideal solution for requirements in marine and stationary technology. It ensures the smooth operation of your engines and certifies that everything works efficiently and precisely.Precision for Optimal PerformanceThe Non-return valve is precisely designed for MAN D engines and meets the highest standards in quality assurance. Weighing only 0.13 kg, it combines lightness and stability necessary for long-lasting functionality. Our strict internal controls ensure that each OEM spare part meets the requirements of your engines.
NON-RETURN VALVE - 81521206025 suitable for MAN D engines
Trust in our Non-return valveDiscover our Non-return valve with the comparison number 81521206025, specifically designed for MAN D engines. This product belongs to the group of Valves and offers reliable functionality that meets the high demands of your diesel and gas engines. Weighing only 0.139 kg, it facilitates both installation and transport without compromising on quality.
What is an engine valve?
An engine valve is a mechanical component that opens and closes to control the flow of gases into and out of the engine cylinders. Typically made from heat-resistant metals, each valve for engine operation must withstand extreme temperatures and high-pressure environments.
There are two primary types: intake valves, which allow the air-fuel mixture to enter the combustion chamber, and exhaust valves, which release burned gases after combustion. The opening and closing cycles of these valves are precisely timed to the engine’s rotation, ensuring seamless combustion and power delivery.
Function and benefits of engine valves
The valves engines rely on must perform under extreme stress. The proper functioning of each valve of engine directly impacts power output, fuel efficiency, and emissions. Worn or faulty motor valves can lead to misfires, reduced engine performance, overheating, or even total engine failure.
Here are the key benefits of using high-quality engine valve parts:
- Optimized sealing and compression
- Efficient combustion and power delivery
- Extended engine life and maintenance intervals
- Reduced emissions and fuel consumption
- Enhanced thermal and mechanical durability
Types, materials and OEM compatibility
Depending on the application, engine valves differ in design and construction. Intake valves are optimized for cooler airflow, while exhaust valves endure hotter temperatures and aggressive gases. Materials range from hardened steel to titanium alloys, often with surface treatments like nitriding or chrome plating for added wear resistance.
Our engine valve parts meet strict OEM standards, ensuring full compatibility with a wide range of engine models. This includes precise dimensions, material specifications, and valve timing synchronization. Whether you're replacing a single motor valve or sourcing complete valves engines sets, our parts are engineered for lasting reliability and performance.
Use cases and industrial relevance
Engine valves play a central role in marine propulsion systems, stationary power units, gas engine installations, and locomotive drives. In these environments, any failure in the valve for engine functionality can cause severe operational downtime. That’s why OEM-compliant, technically precise engine valve parts are essential across all heavy-duty applications.
Buying advantages with us
We supply only OEM-grade motor valves and engine valve parts, ensuring a precise fit and high durability. With fast DHL Express delivery worldwide, technical customer support, and a wide selection tailored for marine and industrial engines, we help you keep operations running with confidence. Easy online ordering and multiple payment options make the procurement process efficient and secure.
Frequently asked questions about engine valves
What is an engine valve?
An engine valve controls the flow of air, fuel, and exhaust gases in a combustion engine. It opens and closes at precisely timed intervals, supporting efficient combustion and power output.
What are the parts of a engine valve?
Typical parts of a engine valve include:
- Valve head (seals against the seat)
- Valve stem (guides the motion)
- Valve seat (provides the sealing surface)
- Spring and cotters (ensure return and retention)
- Guide (ensures proper alignment and reduces friction)
Related components for sealing and engine control
Engine valves operate in conjunction with other vital components such as gaskets, hoses, valve guides, springs, and cooling systems. These elements must work together to maintain compression, regulate temperature, and ensure overall engine stability—especially in demanding marine and industrial settings.