Fire Fighting Pumps Malaysia
Types of Fire Fighting Pumps
A fire pump is a distinctly made water pump, which offers steady water supply for fire extinguishing. Our fire fighting pumps in Malaysia can be fixed to a water source like a reservoir or water tank. These pumps can be charged with diesel or electric motor.
When fire horse, sprinkler system heads, and alternative fire fighting connections are open and the water system inserted at a low-pressure threshold, the firefighting pump gets activated. There are two types of firefighting pumps: centrifugal and Positive Displacement pumps.
A positive displacement fire pump confines a certain amount of water then powers it out to the discharge pipe.
There are two types of Positive displacement pumps: reciprocating pumps and rotary pumps.
The reciprocating pumps are diaphragm and piston pumps while the rotary pumps are gear and screw pumps.
The rotary pumps are mostly used as the primer for lines, main pumps, and hose fill up.
Centrifugal fire pumps are used as the main water systems pumps. It has an impeller which pushes water outwards in a spiral pattern. The pump housing and discharge line resistance together with the impeller’s velocity creates pressure that pushes water out of the pump. A vacuum generated at the opening of the impeller input constantly draws additional water.
Can You Deadhead a Centrifugal Pump?
A centrifugal pump can be deadheaded if there is a steady supply of water and with the inlet and outlet valves closed.
Dangers of Deadhead Pumps
The risk of deadheaded centrifugal pump is that a frictional force is produced as the water spins, causing temperature rise that might vaporize the water. The vaporized water affects the cooling mechanism of the pump leading to wear and tear of the pump’s bearings. In addition, deadheading a centrifugal pump may cause an explosion even when the pump has brine or water.
The effects of deadheading a centrifugal pump can be minimized by adding a separate line to the outlet valve, to allow water to recycle to the inlet valve.
Make sure the line has the required diameter to allow enough water to recycle and prevent overheating of the pump.
The major difference between the two types of pumps is that positive displacement pumps can pump air while the centrifugal fire fighting pumps cannot.
Therefore, positive displacement fire fighting pumps are suitable for filling empty water lines, hence often used as primer fire fighting pumps. On the other hand, centrifugal pumps are suitable for firefighting because of their high rates of flow and effectiveness.
Drafting a Fire Pump
All firefighting personnel are required to learn, understand, and be able to draft a fire pump. The accessibility and availability of fire hydrants in urban areas has greatly enhanced the ability of fire fighting personnel to effectively fight fires in various commercial, residential, and industrial premises in Malaysia.
However, drafting is still an important firefighting skill, especially in places that lack fire hydrants.