How does a diesel fire pump work?
As part of a fire sprinkler system, a fire pump receives water from either an underground water supply or a water tank, lake, or reservoir, and is powered by electricity or diesel fuel. The high-pressure supplied by the pump distributes water through the sprinkler system and hose standpipes.
Who invented the portable fire pump?
Water pumps on wheels, often pulled by men, appeared in the 1700s in the US and England to supplement the work of volunteers passing water buckets from one to another forming a “bucket brigade.” Patents for the first fire engine pump, a twin cylinder single acting pump on a wheeled cart, were granted to Richard Newsham …
What is the difference between single stage and multistage pump?
The primary difference between single-stage and multistage centrifugal pumps lies in the number of stages (also referred to as impellers) they have. As the name implies, single-stage pumps have only one impeller, whereas multistage pumps have at least two.
Is there a difference between one and two stage pumps?
The difference between the two is really simple. A single-stage pump has one dual suction impeller located on both sides of the vehicle, providing volume to all discharges on the vehicle. A two-stage pump has two suction impellers operating side by side.
What is PSI in fire fighting?
PSI stands for pressure per square inch, and GPM stands for gallons per minute. Both of these are vital in helping you choose what kind of firefighting pump you need, and it is very important to know about the PSI and GPM before buying any pump, regardless of the use.
What is the difference between a jockey pump and a fire pump?
The jockey pump is designed to start before the main fire pump and return the fire protection system to its minimum static pressure. However, it is not designed to keep up with the system demand in regard to flow. In this case, the system pressure will continue to decrease until the main fire pump starts.
How many hours diesel driven fire pump should run?
The service tank supplying the fuel to the Diesel driven power source, must have the capacity to enable the pump to run on full load for a minimum of 3 hours , sufficient reserves of fuel must be available on board, outside the machinery space of category – A , for enabling the pump to run on full load for an …
What is the advantage of a multistage pump?
Multistage centrifugal pumps offer the benefit of better efficiency due to tighter impeller clearances and smaller impeller diameters. Higher pressure can be achieved with a smaller motor size and less energy. They also have a smaller footprint.
When would you use a multistage pump?
Multistage centrifugal pumps have been one of the most popular types of pumps in recent years….The horizontal configuration of multistage pumps is best applied in applications like these:
- Reverse Osmosis.
- Boiler Feed.
- Shower.
- Spray.
- Cogeneration.
- Pressure Boosting.
- High Pressure Cleaning.
- Snow making.
What is the primary reason for using a two-stage oil pump?
The answer is that a two-stage pump satisfies the special need to pump fuel oil which has certain characteristics that defy efficient pumping by single stage pumps. Fuel oil starts to break up, or “boil” at vacuum levels as low as 10 inches of mercury. When that happens, foamy oil collects within the pump.
How do you size a fire pump?
Fire pumps are typically sized by pressure range, therefore a 400 gpm pump with a revolutions per minute speed of 3,550 can deliver a rated pressure from 40 to 56 psi without increasing the size of the pump.
How do you size a jockey pump?
Simply stated sizing is 1% of the fire pump’s flow and 110 % of the fire pump’s head. For example, if the Aurora Fire Pump System which is selected is rated 500 gallons per minute at 100 psi, the jockey pump needs to handle 5 gallons per minute at 110 psi.
Is a jockey pump always required?
A jockey pump is not required on systems utilizing a fire pump, however, due to their relative simplicity, jockey pumps are the most common method used to maintain system pressure. Since jockey pumps are not required to be listed, any pump capable of producing necessary pressure is acceptable.
How often should a fire pump be serviced?
Once a year, all fire pump needs to be subjected to an annual performance test which is to be conducted by a qualified professional.