CEA 4001 - Performance Characteristics

63
If the supply to the priming tank is taken from the town main forming a supply to the sprinkler
installation, the connection shall be made upstream of the non-return valve on the town main
connection.
The
size of the priming tank and the pipe shall be in accordance with table16.
T
Table 16: Pump priming tank capacity and pipe size
Hazard class
Minimum tank capacity
Minimum diameter of priming pipe
mm
LH
OH, HHP and HHS
100
500
25
50
9.7 Performance characteristics
9.7.1 General
The closed valve pressure shall not exceed 12 bars.
The NPSH required by the pump shall not exceed 5m at flows up to that defined in table 17
Table 17: Pump size
Hazard Class
Pump type
Pipework
Pump nameplate flow
Pump inlet condition
LH-OH
Suction
Pre-calculated
Nominal as table 18
Zero suction lift
LH-OH
Booster
Pre-calculated
Nominal as table 18
Zero town main pressure
HH
Suction
Pre-calculated
1,4x Flow required in Table
8
Zero suction lift
HH
Booster
Pre-calculated
1,4x Flow required in Table
8
Zero town main pressure
All hazards
Suction
Fully Calculated
Q max
Water supply at low
water level
All Hazards
Booster
Fully Calculated
Q max
Zero town main pressure
Note: Low water level is shown as ”hm” in Figure 5
9.7.2
Pre-calculated systems - LH and OH
Where the pumps take water from a storage tank, the characteristic of pre-calculated LH and OH
systems shall conform to table 18.