Three Station CNC Valve Disc Lapping Machine

The machine adopts a planetary differential motion principle where the lapping plate rotates while the movable ring also turns, achieving both revolution and rotation for high lapping efficiency and excellent surface quality. An integrated CNC control system with variable speed drive provides precise speed control and stable operation for consistent lapping quality. It is widely used in valve manufacturing plants for factory outgoing QC, valve repair and maintenance workshops, and industrial end-user in-house maintenance departments.

The Three Station CNC Valve Disc Lapping Machine is a high-precision lapping solution specifically engineered for sealing face processing of gate valve discs, globe valve discs, check valve discs, and other flat-seal valve components, delivering superior surface quality and consistent repeatability through advanced planetary differential motion technology. The following are its key specifications and capabilities:

1.Valve types processed: Suitable for sealing face lapping of gate valve discs, globe valve discs, check valve discs, and other flat-seal valve components.

2.Lapping principle: Planetary differential motion mechanism where the lapping plate rotates (revolution) while the movable ring also turns (rotation). This dual-motion design delivers uniform material removal and superior surface finish compared to conventional single-motion lapping.

3.Workstation configuration: Three lapping stations allow flexible operation modes: coarse grinding, fine grinding, and polishing can be performed simultaneously on different stations, or three identical workpieces can be processed in parallel for maximum throughput.

4.Lapping media: Compatible with various lapping compounds (200#, 400#, 600#, 800#, 2000# grit) to meet different surface finish requirements.

5.Achievable surface quality: Under initial surface roughness of Ra 6.3 on HRC30-50 material, finished surface roughness can reach Ra 0.4, with sealing face contact ratio of no less than 80%.

6.Operation: CNC-controlled with frequency conversion speed regulation, enabling stepless speed adjustment from 0 to 45 rpm for optimal lapping parameters according to workpiece material and required finish.

7.Ease of use: Lightweight and flexible operation, low labor intensity, high efficiency with one operator capable of managing multiple machines simultaneously.

In summary, the Three Station CNC Valve Disc Lapping Machine combines a three-station flexible production design with planetary differential motion technology, CNC intelligent control, heavy-duty construction, and high efficiency that increases productivity by more than ten times compared to manual lapping. It achieves surface roughness up to Ra 0.4 with sealing face contact ratio ≥80%, making it an ideal choice for valve manufacturers, repair and maintenance workshops, power plants, chemical and petrochemical industries, mining and metallurgy, MRO workshops, large industrial end-users, and third-party testing and repair agencies that require high-quality, consistent, and efficient valve disc lapping.

Features

1.Three-station design：Three independent lapping stations support flexible production modes: coarse/fine/polish sequential processing on a single workpiece, or parallel processing of multiple workpieces for maximum productivity.

2.Planetary differential motion：Lapping plate revolves while the movable ring rotates, delivering superior lapping quality with surface roughness up to Ra 0.4 and sealing face contact ratio ≥80%.

3.CNC intelligent contro：Advanced CNC system with variable frequency drive enables precise speed regulation from 0 to 45 rpm, automatic process control, and consistent repeatable results.

4.Heavy-duty construction：Robust frame design ensures stability and long-term accuracy; equipped with large-diameter high-hardness alloy lapping plates for processing various valve disc specifications.

5.High efficiency：Compared to manual lapping, productivity is increased by more than ten times, significantly reducing labor costs and production lead time.

6.Versatile application：uitable for flat sealing surfaces of gate valves, globe valves, check valves, and other industrial valve discs across a wide range of diameters.

7.Low maintenance：Simple structure with reliable components ensures easy maintenance and long service life.

Applications for : Valve manufacturers, repair and maintenance workshops, power plants, chemical and petrochemical industries, mining and metallurgy, MRO workshops, large industrial end-users, and third-party testing and repair agencies.

Technical Specifications Table

FAQ

1.Are you a trading company or a manufacturer?

We are Wenzhou Yufeng Valve Machinery Manufacturer, a direct factory specializing in the R&D and production of valve testing and lapping equipment, including this three station CNC lapping machine.

2.What is your MOQ for this lapping machine?

Our MOQ is just 1 set. We welcome small trial orders as well as bulk procurement for large B2B projects.

3.What quality certifications do your lapping machines have?

Our equipment is manufactured under strict quality control and complies with international industrial standards. CE, ISO, and other certifications can be provided upon request.

4.What is the planetary differential motion principle and why is it better?

The lapping plate rotates (revolution) while the movable ring also turns (rotation). This dual-motion design delivers uniform material removal and superior surface finish compared to conventional single-motion lapping, achieving surface roughness up to Ra 0.4 with sealing face contact ratio ≥80%.

5.What surface quality can this machine achieve?

Under initial surface roughness of Ra 6.3 on HRC30-50 material, the finished surface roughness can reach Ra 0.4, with sealing face contact ratio of no less than 80%, ensuring excellent sealing performance for valve discs.

6.Do you support OEM/ODM customized services for this lapping machine?

Yes, we provide tailored solutions. We can customize the lapping diameter range (beyond DN50-DN250), lapping plate sizes, spindle speed range, and control system configurations based on your specific valve disc types and production requirements.

7.How many operators are needed to run this machine?

One operator can manage multiple machines simultaneously due to the lightweight and flexible operation design, significantly reducing labor costs compared to manual lapping.

8.What is the standard lead time for this lapping machine?

For standard configurations, lead time is typically 21 to 30 days. Customized models may take 30 to 35 days depending on design complexity.

9.What payment terms do you usually accept?

We usually accept T/T with a 30% deposit and 70% balance before shipment. L/C at sight is also acceptable for larger corporate orders.

10.What information should I provide to get an accurate quotation quickly?

Please share your valve disc details: valve type (gate, globe, or check), disc diameter range (DN), initial surface condition, required surface finish, material hardness (HRC), and production volume requirements. Our engineers will send a tailored technical proposal and quotation within 24 hours.