Product quality control is the competitiveness of enterprises, to ensure that the products or services produced meet/exceed expected standards and can be continuously improved. Shanghai Laiduo has its own unique quality and safety control system.

1、 Quality control
Metal sealing ring series
1. Computer controlled welding equipment
2. 100% LP testing of O-ring welds
3. O-ring 100% bubble sealing test
4. X-ray examination
5. Visual inspection of plating and coating
6. Helium leak test
7. Load rebound test
8. Heat treatment
9. Hydrogen removal treatment
Including rubber gasket series
1. Strictly follow the ISO9001:2008 management system for production management
2. There are no burrs on the bolt hole and outer diameter
3. Non polluting products produced without any adhesive
4. Rubber has a higher rubber content, better resilience and strength, and a longer lifespan
5. Low calcium and magnesium ions
6. The only one in China that uses a safe and environmentally friendly formula that will not cause any pollution to the environment to treat PTFE shells
7. Special packaging for high-purity applications
8. All DN15-DN500 series of molds are available in German, American, Japanese, and national standards
9. Each specification of product has a certain amount of inventory year-round, and the delivery cycle is short

2、 Professional knowledge
1. Experts with over 20 years of experience in the enterprise
2. Internal testing management experts: mechanical properties, materials, and production methods
3. Customer Support: Thinking with Customers
4. R&D: Customized design of irregular O-rings, U-rings, and E-rings; Continuously innovating seals
5. We can research new materials, manufacture new material seal types, or adjust our standard seal types according to the user's usage environment to meet customer needs

3、 Flexibility
1. Very short delivery time, especially urgent delivery service
2. Seals of any size, any required quantity
3. The product can be produced according to customer requirements
4. The response time to customer needs is extremely short (standard one day)
5. Competitive prices
6. Multiple standard materials