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