Every air receiver shall be equipped with an indicating pressure gage (so located as to be readily visible) and with one or more spring-loaded safety valves. The total relieving capacity of such safety valves shall be such as to prevent pressure in the receiver from exceeding the maximum allowable working pressure of the receiver by more than 10 percent.
Safety appliances, such as safety valves, indicating devices and controlling devices, shall be constructed, located, and installed so that they cannot be readily rendered inoperative by any means, including the elements.
All safety valves shall be tested frequently and at regular intervals to determine whether they are in good operating condition.
[58 FR 35176, June 30, 1993]
[58 FR 35176, June 30, 1993]
No valve of any type shall be placed between the air receiver and its safety valve or valves.