在本文中探討冷熱水入口溫度、壓力、動作頻率等條件對於壓力平衡閥失效(漏水)壽命之影響，並將實驗結果以各種加速壽命理論的數學模式進行回歸分析，找出最適用的數學理論模式及在該模式中的相關係數，再經由該數學模式反推其他加速壽命測試條件，進行實驗驗證。
本研究重要成果為：
1. 各操作參數中以工作壓力(52 ~ 82psi)之平均加速率最高，為4.25， 而工作溫度(63 ~ 83℃)之平均加速率為1.94，關於此兩參數之加速壽命試驗數學模式，較佳者為Bazovsky模式及Generalized Eyring模式，而Combination模式稍差。由正常工作壓力(52psi)及工作溫度(63℃)經由此三種數學模式所得中位壽命值與實驗值之誤差皆在2%以下。
2. 頻率(20 ~ 40cpm)加速法之平均加速率為2.82，但其效果隨著工作壓力或工作溫度之提高而明顯下降，在使用上應特別注意。
3. 判定壓力(52 ~ 82psi)加速法之平均加速率為1.19，其加速效果隨著工作溫度之提高而增加，但不同工作壓力下之判定壓力加速效果並無明顯改變。
4. 由破損面的觀察可知壓力平衡閥的失效機構為橡膠膜片與開關轉軸間的磨損所造成，此與壽命韋伯分佈參數β值在1 ~ 3.3之間，所代表的磨耗破壞機構是相符的。此外，由粗糙度Rmax來比較，可發現Rmax與循環數有關，而與造成壓力平衡閥之失效無關。
5. 本試驗正常壽命試驗條件為在52psi,63℃,20cpm及判定壓力52psi下操作10,0000循環數。當操作條件改為82psi,83℃,40cpm及判定壓力82psi時，僅需5918循環數，其加速率達18.2，高於本研究原設定目標值10。

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