We strong commitment to provide the best quality to our customers, to meet this commitment, YOULI has been pushing high-quality policy of processing. We care every small part of key, to ensure our quality from incoming to delivery all under control.

Incoming Quality Control
Check each spare part
Check the Diameter of O-ring
Temperature Test
(Keep 100 degrees Celsius for 72 Hours)
Dimension Projector
Test dimension of spool
Hardness tester
(Test the hardness of spool (HRC STANDARD)
Mechanical Hardness Tester
Test hardness of valve body (HB STANDARD)
Roundness tester
Roundness test of spool
Surface roughness tester
Test surface roughness of spool
In-Process Control
Check inside edge of valve body
Make sure of assembly smoothly
Make sure operating smoothly
After parts are honed, our technician inspects the whole accuracy by using the sophisticated air gauge
Final Quality Control
Delivery Quality Control
Check full functions on testing machine