Quality Control

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Quality Control is the life and soul of Guoyang Valve (GY Balls) products, we never neglect any one single process for pursuing the best quality.

Guoyang Valve (GY Balls) quality control system including three inspections, Blanks Inspection, Machining Inspection and Final Inspection exist in each process throughout the whole manufacturing activities, as below:

Blanks Inspection(Random per heat)

Machining Inspection(100% + tour)

Final Inspection(Random)

Visual

Dimensional

Mechanical Property

Chemical Composition

PO Required Test

Visual

Dimensional

Coaxiality

Symmetry

Perpendicularity

Parallelism

Visual

Dimensional

Roughness

Roundness

Packaging

Therefore, Guoyang Valve (GY Balls) equipped essential test & inspection equipment, such as PMI Analyzer, Metallurgical Microscope, Hardness Tester, Micrometer, Calipers, Height Gauge, Roughness Gauge, Roundness Gauge, etc., our general quality control workflow is as below:

Quality Control

All in all, Guoyang Valve (GY Balls) has one-stop quality control from raw material to finished products, guarantee our valve balls are in perfect condition before delivered to our customers’ hands. We are always trying to be spokesman of Quality Made-in-China, make our quality more trustworthy and with durable service, creating values for our customers and end-users.

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