For medium speed diesel engines used in the maritime industry, valve seat grinding is a critical maintenance procedure. The valve seats are the surfaces where the valves close. Over time, these surfaces can become pitted and damaged from the extreme heat and pressure inside the engine cylinders. This can lead to compressed air leaking past the valves, reducing the engine’s efficiency and performance.
A proper valve seat grinder restores the precise mating surface between the valves and seats. This allows for complete sealing when the valves are closed, optimizing the compression ratio and combustion process. Grinding also removes any pits or grooves that can lead to premature valve stem and seat wear.
Traditionally, valve seats were ground manually using specialized tools and abrasive grinding stones. This labor-intensive process relied heavily on the skill and experience of the technician performing the work. Inconsistencies in the angle, concentricity, and surface finish were common downsides.
To achieve fast, accurate, and consistent results, industry players can now rely on Neptunus’ portable valve seat grinding services. We use the VSL ( Valve Seat Lathe) tool by Chris Marine, which is a specialized tool designed specifically for machining valve seats on medium speed diesel engines, both onboard ships and in workshops ashore.
Our Neptunus valve seat grinding equipment delivers exceptional performance and accuracy.
With pre-set angles and dowel pin precision in our machinery, we ensure consistent and precise valve seat machining.
Our equipment, Valve Seat Lathe (VSL), is compatible with various engine types, providing flexibility for different applications.
Our machine operates at a low noise level, creating a comfortable and productive workspace.
Backed by our experience and expertise, we offer reliable and high-quality valve seat grinding services.
OWe are capable of effectively eliminating surface damage on valve seats, improving engine performance and longevity.
The self-centering mechanism of VSL ( Valve Seat Lathe) ensures precise alignment, minimizing setup time and errors.
| Our Method | Conventional Methods | ||
|---|---|---|---|
| Aspect | Valve Seat Lathe | Lapping | Grinder machines |
| Method | Recommended by OEMs for single line contact development | Not recommended by most OEMs, but still used conventionally | Uses grinding method |
| Surface Damage Removal | Can eliminate all pitting and surface damages | Can remove pitting and surface damages | Can remove pitting and surface damages |
| Precision | Precision angle setting with dowel, minimizing errors | Precision depends on operator skill and care | Operator-dependent precision |
| Time Efficiency | Time-saving, typically saving 2 to 4 hours per valve seat | Time-consuming, can take many hours per valve seat | Time-consuming |
| Equipment Reliability | Quality and safety of components and equipment emphasized | Not specified | Aging machines may affect quality |
| Method | Automatic feed of cutting stroke, precise angle setting | Uses lapping paste and manual process | Uses grinding method |
| Machine Capacity | Up to 96 mm valve stem diameter |
|---|---|
| Weight | 250 kg |
| Max Dimensions | H: 1300 – 1700 mm, W: 700 – 960 mm |
| Electric Power Supply | 3-phase 220 – 250 V 50/60, Hz 3-phase 380 – 440 V 50/60 Hz |
| Noise Level | 81 dB (A) / 80 dB (C) |
| Normal Grinding Time | 10 – 20 min |
| Power Requirement | 1.3 kW |
| Method | Automatic feed of cutting stroke, precise angle setting |
Our advanced cylinder honing machines, such as the HON A, provide precise and consistent honing operations, ensuring optimal surface finish and cross-hatch patterns.
Our portable valve grinder services offer on-site valve refacing and grinding capabilities, minimizing downtime and ensuring efficient engine maintenance.
Neptunus Power Plant Services Pvt. Ltd.
India
Neptunus Main Office
A 554/555, TTC Industrial Area,
MIDC Mahape, Navi Mumbai,
Maharashtra 400710, India.
UAE
Neptunus Global Trading (NGT)
Ras Al Khaimah Economic Zone,
RAKEZ Al Mamourah Street,
Ras Al-Khaimah, UAE.
France
dataVIB Impédance
80 Dom. de Montvoisin,
91400 Gometz-la-Ville,
France.
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