The packing assembly was subjected to {HEAD ~ an EPA Method 21 leakage test} with {TAIL ~ over 100,000 mechanical cycles} of operation, and a packing leakage of less than 500 ppm was obtained using methane as the test fluid 
The packing assembly was subjected to { HEAD ~ an EPA Method 21 leakage test } with { TAIL ~ over 100,000 mechanical cycles } of operation , and a packing leakage of less than 500 ppm was obtained using methane as the test fluid
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH