Specifications

Page 15
Observing the following general guidelines should ensure the best possible
suction condition is created.
• Suction piping is at least the same diameter as the pump connections.
• The length of suction piping is kept to the absolute minimum.
• The minimum number of bends, tees and pipework restrictions are used.
• Calculations to determine system NPSHa are carried out for the worst
condition see below.
Should advice on pump or system NPSH characteristics be required contact
the factory or their authorised distributor.
Fig 8
10.0 Meters (32.8 Feet) Water Column
Suction Lift
Or Vacuum
Atmospheric
Pressure
Suction
Head
NPSH
Available
Suction Line
Friction Loss
Vapour
Pressure
NPSH
Available
Suction Line
Friction Loss
Vapour
Pressure
For Suction Lift
Or Vacuum
Conditions.
For Conditions
With Positive
Suction Head.
Atmospheric
Vacuum