Filter
Top Products
Page 18 Powder Hopper Loaders
Every effort has been made to incorporate these standards into the
design of the Powder Hopper Loading system; however, it is the
responsibility of the personnel operating and maintaining the
equipment to familiarize themselves with the safety procedures and
the proper use of any safety devices.
2-8-3 Fail Safe Operation
If a safety device or circuit should fail, the design must be such
that the failure causes a “Safe” condition. As an example, a safety
switch must be a normally open switch. The switch must be held
closed with the device it is to protect. If the switch fails, it will go
to the open condition, tripping out the safety circuit.
At no time should the safety device fail and allow the operation
to continue. For example, if a safety switch is guarding a motor,
and the safety switch fails, the motor should not be able to run.
2-8-4 Safety Device Lock-Outs
Some safety devices disconnect electrical energy from a circuit.
The safety devices that are utilized on powder hopper loader
models are primarily concerned with the pneumatics and electrical
power disconnection, and the disabling of moving parts that may
need to be accessed during the normal operation of the machine.
Some of the safety devices utilize a manual activator. This is the
method of initiating the safety lock out. This may be in the form of
a plug, disconnect plug, lever or a handle. Within this lockable
handle, there may be a location for a padlock. Personnel servicing
the equipment should place a padlock in the lockout handle.
WARNING! Always disconnect and lockout all electrical power and pneumatic
(i.e. compressed air) sources prior to servicing or cleaning any
loader, including all units. Failure to do so may result in serious
injury.
At no time must anyone remove the lockout or reconnect the twist
plug, other than the person who installed the lockout or who
unplugged the twist plug.