Jockey Pump Controller

By Darma Sentosa (22/09/2011)

Jockey Pump Controller is used as a tool for controlling the working of the pump to regulate water pressure in the hydrant. Jockey pump controller as a controller used to regulate pressure in the pipe so that when the pressure is reduced, the controller will generate a signal to fire pump works. Application of jockey pump is part of the fire pump control system, where its presence is required by NFPA 20 in clause A-2-19 that the pressure maintenance (jockey or make-up) pump to be used to maintain a relatively uniform high pressure on fire protection systems. The size of the jockey pump should load with the allowable leakage rate is within 10 minutes or 1 gpm (3.8 L / min), whichever is greater. The size of the jockey pump should be small than the fire pump. Schematic diagram of the jockey pump controller as follows:

Hydrant System

By Darma Sentosa (19/6/2011) 

Hydrant is the equipment needed by the firefighters, especially in residential facilities or buildings other than mild extinguishers, hoses and fire-resistant clothing. House or buildings that have a fire extinguisher system installation get a rebate of insurance premiums due to the installation of fire can reduce the damage to property or goods insured.

At first, the fire extinguishing system is done by calling the firefighters and then the officer will explore and drill for water. Water from the drilling pipe will meet the well-made temporary, then the distribution of water using a bucket or using a hand pump manually. When the fire can be extinguished, then the well will be closed / capped with a stopper, generally by using a block of wood / redwood later called fireplug. Locations where fireplug will be marked for use at another time when there is a fire around the fireplug. This is why until today sometimes still called fireplug hydrant. Today, the fastest growing hydrant installations where the installation of hydrant used are standardized throughout the world complete with supporting equipment and accessories.

 How it works is a hose connected to the hydrant and valve is opened, it will issue a torrential flow of water with a relatively high pressure. The resulting water pressure at the end of the hose is 350 kPa (this also depends on the size of the hose and water source). This hose can also be connected with a fire engine and then can be connected to a pump with greater power to produce greater water pressure so that it can be divided into several channels. Hoses can also be connected using a connection that has a screw / drat. One important thing to note is the opening of the hydrant line. Where the right method of opening and closing the hydrant is done slowly. This is to avoid the phenomenon of water hammer which can damage the piping system and accessories installation of fire extinguishing systems.