Summary Test Report W-K-M Pow-R-Seal Gate Valve METC SOA Test Valve No. A-22 State-of-the-ART Lockhopper Valve-Testing and Development Project

摘要

The W-K-M Pow-R-Seal Gate Valve (METC SOA Test Valve No. A-22) completed static testing. During static testing the actuator motor overheated, suggesting that continuous-duty actuator motors will be required for lockhopper applications. The external leakage rates reached over 0.4 scfm despite repeated tightening of the packing gland. Internal leakage started increasing significantly at the end of the 300 exp 0 F test series. During the final ambient-temperature test series, internal-leakage rates of 0.8 to 13.0 scfm were measured. Both the internal and external leakage exceeded the allowable limits for static testing (6.0 and 0.1 scfm, respectively). When the valve was removed from the test unit, gross damage to the seats and gate was visible. The through-conduit design of this valve should have considerable potential for high-temperature solids service. It is recommended that the specific configuration and materials used in this valve be reviewed and a modified valve submitted for further testing. (ERA citation 06:028048)