Fire Protection Pump

7/31/2019 Fire Protection Pump

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Tel : 0795670677

E-mail : [email protected]

Eng.Humaid Abu Humaid

Fire Protection Pumps

Prepared by


A Fire Pump is:


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any device that takes water from any source, such as public or private mains, tanks, ponds, or

reservoirs and increasing the pressure of water for the purpose of supplying the necessary flow

to any fire protection system such as sprinkler standpipes, water spray or foam system.

Types of Pumps: (According to Purpose)

1. Suction Pump : Is a type of fire pump that supply the necessary flow and pressure ofwater for fire fighting system from water reservoirs , ponds ,well and river.

2. Booster Pump: Is a type of fire pump that increase the water pressure, which is drawnfrom a public service main or private-use water system.

3. Jockey Pump: Is a type of fire pump that maintain system pressure without turning onthe fire pump.


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Types of Pumps (According to Operation Method)

1 .Centrifugal Pump: It is used for stand pipe, sprinkler and spray nozzles system.

Centrifugal pump components:

Section of Horizontal Split Case Pump

Impeller

CasingShaft Sleeve

Packing

Lubrication

Purges

Bearing

Ball

Eye

Shaft

A- Impeller

B- Eye

C- Shaft

D- Packing

E- Casing

( Bronze)

Stainless-steel

Packed gland

Cast iron

F-Shafts leave Bronze


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2 .Positive Displacement Pump: It is used on fire trucks, water mist system

that require very big pressure and as a foam concentrate pump in foam/water system

Types of Centrifugal PumpsThe pumps divide into two types according to shaft position, pump divide to:

a- Horizontal:

a. End Suctionb. Horizontal split case pump

It is not used for suction lifts from water reservoir (NFPA) but it is used for NPSH not

more than 5.38m and suction head 3.7m and it need a priming tank capacity 100-500 liters

(LPC).

b- Vertical


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Fire Pump Installation

a- Horizontal split case fire pump

b- Vertical shaft turbine type pump.

1- Installation in a well

2- Installation in wet pit


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Rated Pump Capacitygpm L/min gpm L/min gpm L/min

25 95 400 1514 2000 7570

50 189 450 1703 2500 9462

100 379 500 1892 3000 11355

150 568 750 2839 3500 13247

200 757 1000 3785 4000 15140

250 946 1250 4731 4500 17032

300 1136 1500 5677 5000 15925

Notes:

1- pumps for rating over5000 Gpm are subject to individual review by civil defence2- A centrifugal fire pump shall be selected in the range of operation from 90% to 150 % of it

is rate capacity

Fire Pump Application

a. According to NFPA the fire pump are used for sprinklers and hydrants system

b. According to BS5306 part 2 (LPC) there are two sets of pump one for sprinklersystem and other for hydrant system


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Shop Test : Each individual pump shall be tested at the factory to provide detailedperformance data and to demonstrate its appliance with specification.

1- Rated flow2- rated pressure

3- brake horse power

4- efficiency

5- NPSH

6- Shaft rotation

Operating Range of Fire Pump

The relation between flow and pressure shaft as follows:

Rated Pump Capacity as Follows:

Situation Flow

(gpm)

Percent % Pressure Psi Percent

%

Accepted

ratio %

a. Pump rating 1500 100 % 80 100 % 100 %

b. No flow (churn) 0 0 % 90 112.5 % 65 %

Operating Range of Fire Pump

- Flow Curve :

Flow % Pressure %

0% Not more than 140%

100% 100%

150% Not less than 65%


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Types of Driver

a. Electric Motor

b. Diesel Enginec. Steam Turbine

Minim

um

Pipe

Fire Protection Pump

Documents

Transcript of Fire Protection Pump