17 Technical Information
320/342 TwisTorr 74 FS User Manual / 87-901-053-01
Purge Valve Installation
A gas purge valve is available to protect the pump bearings against
particulate and corrosive gases that could move into the pump. To
install the gas purge valve it is necessary to unscrew the M12 screw
from the purge port as shown in the following figure;
and then screw the M12 gas purge valve (with a torque of 2.5 Nm).