KSB Itur IN Series

Single-stage horizontal centrifugal pumps built strictly to EN 733 / DIN 24255, so an IN Series pump drops into an identical footprint anywhere in the fleet. It is a closed radial impeller design with renewable front and rear casing wear rings, serving as the primary engine room water distribution block worldwide.

The back pull-out design is the key feature: paired with a flexible spacer coupling on a common baseplate, the entire rotating assembly, bearing bracket, shaft, seals, and impeller, pulls out from the rear for a full overhaul without touching the suction or discharge piping. Two sealing options fit the same housing: a mechanical seal (DIN 24960) for standard duty, or gland packing for rugged bilge and general service. The 34 sizes share just 4 bearing bracket groups (24, 32, 42, 52), keeping spare bearings, shafts, and seals to a minimum across a fleet.

Max Flow 1,210 m³/h @ 60 Hz

Max Head Up to 140 m

Max Speed Up to 3,600 rpm

Temperature Range -10 °C to 100 °C

Max Pressure 10 bar (cast iron GG-25) / 16 bar (bronze / ductile iron)

Suction DN 50 to DN 200

Discharge DN 32 to DN 150

Models

IN-32/125 IN-32/160 IN-32/200 IN-32/250 IN-40/125 IN-40/160 IN-40/200 IN-40/250 IN-40/315 IN-50/125 IN-50/160 IN-50/200 IN-50/250 IN-50/315 IN-65/125 IN-65/160 IN-65/200 IN-65/250 IN-65/315 IN-80/160 IN-80/200 IN-80/250 IN-80/315 IN-100/200 IN-100/250 IN-100/315 IN-100/400 IN-125/250 IN-125/315 IN-125/400 IN-150/200 IN-150/250 IN-150/315 IN-150/400

Reference Numbers

These reference numbers identify a part's position on the series diagram — the exact part fitted differs by model. To order, provide the reference number together with the model name and the serial number stamped on the nameplate.

Pump casing 102

Pump cover 161

Supporting foot 183

Pump shaft 210

Impeller (IN Series) 230

Rear bearing 321.1

Front bearing 321.2

Bearing cap 330

Flat gaskets (Casing) 400.1

Flat gaskets (Bearing cover) 400.2

Washers 411

O-ring 412

Felt ring 422

Mechanical seal 433

Stuffing box 452

Packing lantern 458

Packing 461

Casing wear ring (IN Series) 502.1

Cover wear ring 502.2

Spacer sleeve 504

Deflector protector 507

Shaft sleeve (mechanical seal) 523

Shaft sleeve (packing) 524

Grease gun 636

Hexagonal screw 901

Studs (Casing main studs) 902.1

Studs (Bearing frame studs) 902.2

Pressure gauge/priming/vent plug 903.1

Pump emptying plug 903.2

Allen screw 914

Nuts (Casing flange nuts) 920.1

Nuts (Bearing housing nuts) 920.2

Impeller nut 922

Impeller key 940.1

Driving key 940.2

Don't see the series or exact model? Send us your vessel details and the pump nameplate, and we'll confirm whether we can source it.