If the gate valve is ever re-installed, the following safety procedures should be observed. Without power, the gate valve assumes its default closed position due to pressured air. When installing the slit boxes, or working with your hands in the vicinity of the inside of the gate valve, disconnect first the power plug of the gate valve, such that the gate valve closes. In case you need the gate valve to assume a default open position without power, first relieve the air pressure with power on, and verify that the default position of the gate valve has changed to ``open" by removing the power. Paul Hood (x7849) or Mike Fowler (x7162) can be contacted for more information.
When installing the slit ladder, be careful when you work with your hands under the slit ladder (like when you are bolting the slit box to the gate valve). Remove the slit ladder, or install a support under the slit ladder to prevent it from falling all the way down.
A brake system has been included in the control to prevent the slit ladder from sliding down in case of a power failure. However, this must not be relied upon for personnel safey.