CEA 4001 - Page 31

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31

3)

the

net

positive

suction

head

(NPSH)

graph;

4)

a

statement

of

the

power

output

of

each

prime

mover;

c)

the

installer's

data

sheet

showing

the

pump

set

installed

performance

pressure/flow

characteristics,

at

the

control

valve

'C'

gauge

for

normal

water

level

and

for

low

water

level

'X'

(see

Figures

4

and

5),

and

at

the

pump

outlet

pressure

gauge

for

normal

water

level;

d)

the

height

difference

between

the

control

valve

'C'

gauge

and

the

pump

delivery

pressure

gauge;

e)

the

installation

number

and

the

hazard

classification(s);

f)

the

available

and

the

specified

NPSH

at

maximum

required

flow;

g)

the

minimum

depth

of

water

cover

in

the

case

of

submersible

pumps;

In

addition

where

the

pipework

is

fully

calculated

the

following

details

shall

be

provided;

h)

the

demand

pressure/flow

characteristic

for

the

hydraulically

most

unfavourable

and

most

favour-

able

area

of

operation

calculated

at

the

control

valve

'C'

gauge.

3.4.4.5 Pressure tank

The

following

details

shall

be

provided:

a)

the

location;

b)

the

total

volume;

c)

the

volume

of

stored

water;

d)

the

air

pressure;

e)

the

height

of

the

highest

sprinkler

above

the

bottom

of

the

tank;

f)

details

of

the

means

of

replenishment.

3.4.4.6 Water storage tank

The

following

details

shall

be

provided:

a)

the

location;

b)

the

total

volume;

c)

the

volume

and

duration

of

stored

water;

d)

inflow

for

reduced

capacity

tanks;

e)

vertical

distance

between

the

pump

centre

line

and

the

tank

low

water

level

'X';

f)

structural

details

of

the

tank

and

roof;

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