What is the main purpose of a jockey pump?
A jockey pump, also know as a pressure maintenance pump, maintains the pressure in the fire sprinkler system to avoid non-emergency starting of the main fire pump.
How often should a jockey pump run?
For electric motor-driven fire pumps, we recommend at least running your equipment once a week for at least ten (10) minutes for a visual inspection.
How long does a jockey pump last?
They ensure that the fire sprinkler system has adequate water pressure. These systems are pricey, but they do have a relatively long life expectancy. A fire pump’s lifespan is approximately 20-25 years and they can operate this long with the proper maintenance plan.
Why it is called jockey pump?
A jockey pump is a small pump connected to a fire sprinkler system and is intended to maintain pressure in a fire protection piping system to an artificially high level so that the operation of a single fire sprinkler will cause a pressure drop which will be sensed by the fire pump automatic controller, causing the …
How do you check a Jockey pump?
Verify start and stop settings on the pressure maintenance pump (jockey pump) by dropping the pressure in the jockey pump sensing line. After completing all inspection procedures, start the pump by slowly dropping the pressure in the controller sensing line. The pump should be run a minimum of 30 minutes.
Is standard for jockey pump?
The capacity of the jockey pump shall neither be less than 3 percent (with a minimum of 180 l/rein) nor more than 10 percent of the installed pumping capacity. 6.7 Pumps (other than Jockey pumps) should be able to develop head of greater than 65 percent of rated head at capacity of 150 percent of rated capacity.
What is pump duty?
Defined as that Duty Point on the H-Q curve where a centrifugal pump operates at maximum efficiency. Pump duty curves (and thus the design duty point) are subject to shifting from their water specific curves when handling highly viscous fluids.
How do you size a jockey pump?
“The pump manufacturer, Armstrong pumps, recommends, as a rule of thumb, to size the jockey for about 1 % of the rated flow of the main fire water pump. Also they recommend that jockey to be sized with 10 psi (0.7 bar) higher pressure than the system design pressure of the firewater ring.”
How many GPM will a 1 hp pump?
52 GPM
How do I know what size fire pump I need?
For example, if you have a 40,000-square-foot building that is all ordinary group 1, the calculation would be 1,500 x 0.15 (density) = 225 + 250 (hose demand) = 475 gpm total for the fire pump. If the structure has multiple hazards, the hazard with the highest gpm calculation dictates the pump size.
How do you calculate pump capacity?
Quick Formula
- Water horsepower = minimum power required to run water pump.
- TDH = Total Dynamic Head = Vertical distance liquid travels (in feet) + friction loss from pipe.
- Q = flow rate of liquid in gallons per minute.
- SG = specific gravity of liquid (this equals 1 if you are pumping water)
- Water horsepower =
How much HP pump do I need?
Example – Horsepower Required to Pump Water
| Power Required to Pump Water (hp) | ||
|---|---|---|
| Volume Flow (gpm) | Height (ft) | |
| 10 | 0.0126 | 0.101 |
| 15 | 0.0189 | 0.152 |
| 20 | 0.0253 | 0 |
How many types of pump are there?
There are three basic types of pumps: positive-displacement, centrifugal and axial-flow pumps.
What are the 2 types of pumps?
Pumps are divided into 2 major categories: Dynamic and Positive Displacement (aka Displacement).
What are the two main classification of pumps?
It is also called Kinetic pumps Kinetic pumps are subdivided into two major groups and they are centrifugal pumps and positive displacement pumps. A centrifugal pump is a rotating machine in which flow and pressure are generated dynamically.
What are the two main types of water pumps?
There are two basic types of water pumps: centrifugal and positive displacement. Both types are designed to move water from one place to another continuously. A centrifugal water pump uses a rotating impeller to move water into the pump and pressurize the discharge flow.
What are three different types of water pumps?
Positive displacement, Centrifugal and axial-flow pumps are the three basic types of pumps.