Testing Safety Valves.

When testing the safety valves, the test can only be done when the boiler pressure is near or at the maximum working pressure.
Grasp the quick release handle and pull towards yourself ( away from the bonnet of the safety valve ) for approximately 5 seconds and then release the handle.
All the safety valves must be tested in this manner at least once a Shift when steaming.
Before testing the safety valves make sure that the wedges are in place in the collars of the valves.
Caution: Always wear gloves when testing the safety valves.