Relief Valve Flashcards
For pumps from 1,250 to 2,250 GPM, how many inches (size) is the relief valve?
3-4
When setting the relief valve, turn valve what direction until the main gauge drop 5 to 10 PSI
Counter Clockwise
When a relief valve is acting sluggish or how after shall you exercise valve?
Monthly
What control the Relief Valve Proper
Pilot Valve
What happens if you open the relief valve drain when the fire pump is operating?
PSI Decrease
What PSI is the relief valve lowest setting is?
70
What shall you do with the relief valve when PSI is above 300 PSI?
Turn System Off
The Relief Valve must have __ PSI pressure differential between intake and discharge pressure.
50 PSI
The maximum setting is ___ PSI?
300
For fire pumps with rated capacities of 1250 gpm through 2250 gpm, a ___ or __ inch outlet diameter
relief valve is used.
3-4
The Relief Valve is equipped with Indicator Lights. A Green light means valve is fully?
Closed
The Relief Valve is equipped with Indicator lights, A Amber means valve is?
Either partially or fully open
If the relief valve operation is sluggish or erratic, the cause can usually be traced to fine sand or other
foreign material clogging one of the valves or strainer. At least ___ follow the exercise instructions.
Monthly
If the flush procedure does not correct the sluggish relief valve open the relief valve drain, drain cock
on the relief valve cover or unfasten the connection between at the relief valve. If PSI ___, the relief
valve is not stuck, & trouble can be attributed to the pilot valve.
Decreases
When the indicator light fails to properly operate, manually operate control switch. If lights do not
operate (amber light on when switch plunger is depressed, and green light on when it is released),
the switch is probably defective, and should be replaced. If the switch is replaced or has been
temporarily removed from its mounting bracket you should
Adjust the clearance between the switch plunger and actuating rod.
