文档介绍：SUBJECT: VG4400GC
RESULT:
GOOD
AVERAGE
POOR
CONTINUE TEST
MAKE DISCUSSION
PURPOSE: Localization valve qualification
REQUESTED BY: APPH
REFERENCE: 06-88024-32
PREPARED BY: Xiaopeng Chen/ Wenbin Liu
APPROVED BY: Xianzhong Wu
New Equipment Description
Forging brass valve bodies manufactured by Dunan were investigated as possible low cost replacement for the original JCI casting bronze valve bodies currently used on the VG4400GC.
Problems/Concerns(Resolved and unresolved)
A set of samples were used for this validation testing, the total amount are 20 pcs. The samples were tested for body leakage test, seat leakage test, valve stroke test, max flow rate test, valve body burst pressure test, body connection torque test and life test
Conclusion
VG4400GC new valve body
Validation test results have been shown the new valve body testing values were within the specification.
No.
Testing Items
Testing Results
Pass/Fail
1
Body leakage test
No leaks at 3MPa water pressure
Pass
2
Seat leakage test
No leaks at 350kPa diff. air pressure
Pass
3
Valve stroke test
Within the range of ±
Pass
4
Max flow rate test
Max. kv is more than
Pass
5
Valve body burst pressure test
No leaks and distortion at the burst pressure more than 14MPa
Pass
6
Body connection torque test
No body and seat leaks and distortion found after torque test
Pass
7
Life test
One valve body and seat leaks found after life test
NG
Process capability (Cp for dimension and flow characteristic) has been improved
New Supplier has to be considered validated to reduce cost and shorten delivery time.
Valve body leakage test
Valve body leakage test is carried out on a set of 20 samples.
Test conditions:
Medium Ambient temperature water
Pressure Pressure 3MPa
Test duration time 15 sec.
Max. leakage “zero” leakage by visual inspection
To check for leakage, the valve inlet thread connects to the hydraulic hand pump outlet side, install a blind