Brochure

Continuously bladed diffuser-return channel
maximizes range of flow with high efficiency.
Diffusers are precision casted to guarantee high
conformity and low radial loads on the rotor.
Discharge channel, downstream of last stage, is
designed to minimize hydraulic losses and increase
efficiency.
Extraction/insertion of inner bundle in the barrel is
facilitated by a special tool suitable for DDHM pumps
at all frame size. The bundle assembly includes
bearings and seals that minimize field activity.
Inner bundle fitted with rollers to avoid damage to
internal seal surfaces during assembly/disassembly
for maintenance.
Main benefits
• High reliability given by low
vibration levels
• High efficiency thanks to
optimized hydraulic design
• Easy maintenance obtained
with detailed design of assembly
solutions
7
Other key features
Operating data
Differential head up to 2,500 m
Flow rate up to 1,500 m
3
/h
Shaft power up to 10 MW
Rotational speed up to 6,600 rpm
Head rise 15 – 30%
Operating temperature -10°C – 120°C
Impeller diameters 250 – 385 mm
The standard frames are: 4x11, 6x11, 6x12, 8x15, 10x16.
Customization options
This graph shows the performance range of our standard product portfolio.
1. Integral studded flanges to reduce weight
of the barrel; alternative orientations of
inlet and outlet nozzles are available
2. Flanged and bolted cover for the barrel to
increase operating temperature
3. Foot-mounted barrel to reduce footprint
4. Lube oil console integrated in the
baseplate to minimize footprint
5. Optional balancing of rotor after assembly
of the bundle to guarantee and certify
residual unbalance ISO1940 G1 for
maximum reliability
1 2 3 4 5
Performance range
Flow rate (m
3
/h)
Differential head (m)
2,500
2,000
1,500
1,000
500
0
0 250 500 750 1,000 1,250 1,500
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