Quality Control
Third Party Inspection for Valve - This guides us through all the necessary stages in the production of the valves, from the examination of certification of procurement sources to the final inspection, preservation and packing, to the dispatch to site.
It is particularly suitable for the inspection of Gate, Globe, Ball and Check valves. 
The following are included:
▼ Valve Material Inspection
▼ Valve Welding Inspection
▼ Visual and Dimensional Checking
▼ Valve Low Pressure Air Test
▼ Valve Hydrostatic Testing
▼ Post Hydrostatic Testing
▼ Valve Final Inspection
▼ Valve Name Plate Checking
▼ Valve Painting and Coating Checking
▼ Valve Spare Parts, Loose Items and Accessories control
▼ Valve Packing, Marking and Shipping Inspection

As an experienced valve supplier in China, Antai has won reliance from many customers for its stable quality and superior performance of valves.

We are pleased to take you on a virtual tour of Antai's quality control. 

Following show how our inspection department and technical department work on valves, including many steps involved in the manufacturing, testing and package. 

Out team attaches high importance to quality. We have whole complete strict inspection steps, which include from raw material, machining process, hydraulic test, painting, packing to shipment. Inspectors are responsible for their inspected valves. 

To keep stable quality, our team has long cooperation with Third-Party Company, Customers' satisfactory is our great aim.
We do 100% inspection before shipment. Inspection contents include dimensions, material chemical compositions, hydraulic test, air test, torque value, painting (type, color, thickness and painting technique) and package.
Products with defects are never allowed to ship out!

We inspect from below steps:

1. RAW MATERIAL                                                                 Raw casting inspection:


Ultrasonic Inspection Testing(Non-Destructive Testing)                             Wall Thickness Inspection


Connection flange                                                                                      Spare part


Pressure inspection                                                                                   Pressure testing

5. Painting

Cleaning before painting                                                                            After painting


Protective packaging                                                                                  Clapboard application

All of our efforts are directed to make sure that customers needs are completely satisfied. If the way we work is not quite fit the way you work, we'll adjust accordingly. If customers have unexpected problem or special request, we will take extra effort to handle it quickly and efficiently.
Quality control is an active, not reactive, function of manufacturing. Quality assurance starts the minute raw materials come in the door and continues through every stage of the casting process. We achieve part-to-part consistency, so the last casting is the same high quality as the first.
Continuing statistical process control and process capability improvement is applied for all products manufacturing process. Our commitment and continuous effort in improving product quality has established our image as a high quality manufacture and supplier.
We aim to be world class, committed to customer satisfaction & to encourage the spirit of leadership amongst our dedicated team by creating a healthy environment for continuous growth, profit and prosperity.