Product Description
Ball Valve Grinding Machine
This ball valve grinding machine delivers precise and efficient valve ball and seat grinding. Its centerless grinding system ensures perfect concentricity between the ball and stem, while the motorized rollers drive the valve automatically, maintaining smooth rotation and accurate grinding. The advanced design achieves high surface finish and roundness, making it ideal for hard-seal ball valve production and maintenance workshops.
Working Principle
- The valve ball is rotated slowly while the grinding disc rotates rapidly to achieve uniform precision polishing.
- Adjustable eccentric distance ensures high-precision control of grinding depth and speed.
- Centerless rotation eliminates clamping deviation and ensures perfect alignment of valve head and stem.
- Continuous hydraulic power system ensures stable pressure during the grinding process.
Specifications
1. Main technical parameters of spherical grinder (NS100) using for 1-6" ball
| Parameter | Unit | Value |
|---|---|---|
| Grinding sphere diameter (≈) | mm | Φ25-Φ165 |
| Ball hole diameter (≈) | inch | 1/2"-4" |
| Distance from top center line to table top | mm | 120 |
| Maximum Ball Weight | Kg | 50 |
| Spindle motor power | KW | 5.5 |
| Spindle speed range | Rpm | 100 ~ 3000 |
| Headstock transmission torque | NM | greater than 40 |
| Headstock speed range | Rpm | 6-50 |
| X/Z travel | mm | 130/130 |
| Tail stock adjustment | mm | none |
| Variation range of center distance between two | mm | 30-200 |
| Top of head and tail frame | / | Mohs 5# |
| X/Z axis unidirectional positioning accuracy | mm | 0.02 |
| X/Z axis unidirectional repeat positioning accuracy | mm | 0.01 |
| Sealing surface spherical roughness | Ra | 0.4-0.2 |
| Ball sealing surface roundness | mm | 0.01 |
| Dimensions approx. | mm | 180018002000 |
| The net weight of the machine | Kg | 3500 |
Main technical parameters of spherical grinder (NS150) using for 8-16" Ball
| Parameter | Unit | Value |
|---|---|---|
| Grinding sphere diameter (≈) | mm | Φ88-Φ242 |
| Ball hole diameter (≈) | inch | 2"-6" |
| Distance from top center line to table top | mm | 140 |
| Maximum Ball Weight | kg | 50 |
| Spindle motor power | KW | 5.5 |
| Spindle speed range | Rpm | 100 ~ 3000 |
| Headstock transmission torque | N·m | greater than 40 |
| Headstock speed range | Rpm | 6-50 |
| X/Z travel | mm | 150/150 |
| Tail stock adjustment | mm | none |
| Variation range of center distance between two | mm | 30-280 |
| Top of head and tail frame | / | Mohs 5# |
| X/Z axis unidirectional positioning accuracy | mm | 0.02 |
| X/Z axis unidirectional repeat positioning accuracy | mm | 0.01 |
| Sealing surface spherical roughness | Ra | 0.4-0.2 |
| Ball sealing surface roundness | mm | 0.02 |
| Dimensions approx. | mm | 195019502000 |
| The net weight of the machine | kg | 4500 |
Product Features
- Available in single-head and double-head types for flexible valve grinding operations.
- High-precision slow ball rotation and fast disc rotation for consistent grinding results.
- Adjustable eccentric head design for precise grinding control.
- Durable structure made of stainless steel and iron for long service life.
- Compatible with Kemet abrasives for fine surface polishing.
- Custom fixtures available for different valve sphere diameters (50–300 mm, up to φ635 mm outer).
Power & Control System
- Working Voltage: 380V (3-phase), Control Voltage: 220V.
- No compressed air required — equipped with its own hydraulic supply system.
- Automatic drive rollers ensure valve rotation control and length adjustment.
- Frequency control for main grinding head and spherical head for stable, precise operation.
Applications
- Hard-seal ball valve grinding for industrial valves, pipeline valves, and control valves.
- Suitable for valve manufacturers, maintenance workshops, and metal processing plants.
- Ideal for achieving mirror surface finish and high roundness on steel and alloy valve balls.
Service & Support
- Free testing with customer-provided valve ball samples to verify surface accuracy.
- Comprehensive 1-year machine warranty with lifetime technical support.
- On-site engineer support available — only travel expenses required beyond warranty period.
- Customized fixture and grinding solutions provided based on valve ball specifications.
Advantages
- High precision grinding with roundness up to 0.005 mm.
- Automatic operation reduces manual labor and improves consistency.
- Hydraulic control ensures stable pressure and smooth motion.
- Energy-efficient system with frequency control for speed adjustment.
- Strong support service for global customers in the valve manufacturing industry.