Patent ID: 9696244
Date: 2017-07-04
CPC Classifications: F16K,G01N

Claim:
1. An apparatus comprising: a first ball valve having a first position being an open position, said open position having an internal diameter through which flow occurs when said first ball valve is in said first position, said first ball valve having a second position being a closed position, said internal diameter being a nominal diameter of an input pipe for said first ball valve; a second ball valve having a first position being an open position, said open position having an internal diameter through which flow occurs when said second ball valve is in said first position, said second ball valve having a second position being a closed position; said first ball valve and said second ball valve being configured such that when said first ball valve is in said first position, said second ball valve is in said second position; a mechanism that causes said first ball valve to change from said first position to said second position while said second ball valve changes from said second position to said first position; a first sampling port on said first ball valve that drains said internal diameter when said first ball valve is in said second position, said first sampling port being inoperable when said first ball valve is in said first position; a second sampling port on said first ball valve that pressurizes said internal diameter when said first ball valve is in said second position; and an inlet junction upstream from said first ball valve and said second ball valve, said inlet junction comprising an input connection and a first connection to said first ball valve and a second connection to said second ball valve.