测试程序
TEST PROCEDURE:

　　循环测试的目的是为了确定阀杆密封和阀体垫圈的零泄漏密封性，测试介质是丙烷，压力为115, 740或1400 psi，150, 300或600磅级，API 598标准下水和气在各种压力下的阀座密封性。
　　The purpose of cycle testing was to determine cycle life for 0 ppm tightness of stem seal and body gasket with propane at 115, 740 or 1400 psi for Classes 150, 300 or 600, and seat tightness to API 598 with water and gas at various pressures.

测试包括
The testing consists of:

• 预循环评估
  Precycling evaluation.
• 每500次测量一次填料盖和阀体垫圈
  Gland and body gasket emissions measured every 500 cycles.
• 每500次按照API 598测量一次阀座泄漏
  Seat leakage to API 598 measured every 500 cycles.
• 每1000次测量一次阀座磨损
  Seat wear measured every 1000 cycles.

测试结果
TEST REDULTS:

　　在上述测试中紧密性零泄漏。在我们的组合气体分析仪（测量范围为1-10,000/百万）上没有泄漏显示。
　　0 ppm tightness during tests shown above. Definition of 0 ppm is no detectable leakage registered on our organic vapor analyzer which has a range of 1-10,000 ppm.