Inside Handa's CNC Machining and Quality Control System: The Backbone of Reliable Batch Delivery

From Raw Material to Finished Product: Handa's Manufacturing Strength

As a professional valve manufacturer with nearly two decades of industry experience, Handa Valve has always regarded manufacturing capability as the foundation of batch delivery. This article takes you inside Handa's workshop and QC laboratory to explore our CNC machining and quality control system.

1. CNC Machining: Precision Is the First Language of Valves

Handa's workshop is equipped with dozens of large CNC machining and turning centers, covering the full valve range from DN15 to DN1400:

• 5-axis machining centers: high-precision one-pass forming of complex surfaces such as discs and bodies
• Automated inspection: 100% CMM measurement of key dimensions, machining accuracy within ±0.02mm
• Capacity assurance: monthly capacity exceeding 5,000 units to support batch supply

2. Full-Process Quality Control: From Material to Finished Product

1. Material inspection: spectrometers verify chemical composition of every batch, eliminating substandard materials
2. Casting inspection: 100% X-ray/ultrasonic inspection of critical pressure-bearing castings
3. Pressure testing: every shipped valve undergoes shell strength and seat seal tests per standards; records are archived and traceable
4. Surface treatment: coating, passivation, degreasing customized per service; oxygen valves receive oil-free degreasing
5. Final inspection: individual appearance, marking, torque, and open/close checks before shipment

3. Materials Laboratory: Every Batch with Verifiable Records

Handa operates its own materials testing laboratory with direct-reading spectrometers, hardness testers, and metallographic microscopes, achieving end-to-end traceability from incoming raw material to finished product. Material certificates for every batch are delivered with the goods, meeting project acceptance and owner audit requirements.

4. Batch Delivery: Not Just "Can Make It" but "Delivers It Steadily"

For equipment manufacturers such as air separation and oxygen plants, the core requirements for valve supply are batch consistency and delivery stability. Through digital scheduling, modular inventory, and standardized processes, Handa delivers:

• Standard models in 3-7 days from stock
• Batch orders (100+ units) in 4-6 weeks
• Annual supply capacity of 50,000+ units

5. Conclusion

Manufacturing strength is the cornerstone of customer trust. Handa Valve ensures product consistency with CNC precision, long-term reliability with full-process QC, and delivery promises with scalable capacity — the fundamental confidence behind our service to industrial gas, refinery, and chemical customers.