Fire Pump Pressure Switch Setting

Start the fire pump and note the maximum pressure on the discharge gauge.

Fire pump pressure switch setting.

Nfpa 20 covers the settings. The pressure operated switch in the controller should be sensitive enough to permit this range to be as short as 10 to 13 psi. Jockey pump start 165 psi 10 psi 155 psi v. Pressure settings for fire pump controllers.

Jockey pump would be set to come on at 140 psi and shut off at 150 psi. Depending on the type of pressure switch the fire pump would come on at 130 135 psi. Nfpa 20 s pressure switch settings for fire and jockey pump settings are required to be relatively close to help eliminate water hammer on start up. 60 psi from city maximum static iii.

Jockey pump stop 115 psi 50 psi 165 psi iv. Fire fighter vinod choudhary 33 372 views 29 33. Let s say the pressure is 150 psi. A sudden massive amount of water.

Fire pump stop 115 psi 50 psi 165 psi vi. 50 psi from city minimum static. 2 the jockey pump start point should be at least 10 psi 0 68 bar less than the jockey pump stop point. 1 the jockey pump stop point should equal the pump churn pressure plus the minimum static supply pressure.

Examples of fire pump settings. 1 the jockey pump stop point should equal the pump churn pressure plus the minimum static supply pressure. The fire pump system when started by pressure drop should be arranged as follows.