Launching process: close the inlet valve and ball valve, open the main valve 1, empty the pig launcher, and put the pig into the open blind flange; Turn off the blind flange. Enter the liquid valve, close the main valve 1, open pig launcher valve, passage ball indicator acts, that means pipeline cleaner has been sent, open the valve main 1, close the inlet valve, launcher ball valve.

Receiving process: close main valve 2 and open pig receiver valve and outlet valve. When the indicator moves, it means that the cleaner has entered into receiver and open main valve 2, close pig receiver valve and liquid outlet valve, the pig receiver is emptied, and open the blind flange to collect the ball when the pressure gauge goes zero.