4
Self venting regulators can reduce the outlet pressure, by turning the hand wheel anti-
clockwise, thereby venting the excess pressure through the vent port on the regulator. The
vent on the LF540 exhausts to atmosphere.
4. Special Conditions for Safe Use
Turning the hand wheel anti-clockwise (with pressure on the outlet) should be refrained on
non-venting regulators. Pressure should be reduced in this case by venting downstream of
the regulator, and turning the hand wheel simultaneously anti-clockwise.
For safety and to avoid the risk of venting unwanted fluids to atmosphere, the LF540 self
