S 300-435 Horizontal Split Case Pump
Compare the S 300-435 size family. The reference point below belongs to S 300-435(I) at 1450 rpm with a 450 mm impeller. Request the curve and GA for your required configuration.
S 300-435(I) Reference Configuration
| Parameter | Reference |
|---|---|
| Reference configuration | S 300-435(I) |
| Reference flow | 1,677 m³/h |
| Reference head | 53 m |
| Reference speed | 1450 rpm |
| Reference efficiency | 89% |
| Reference impeller | 450 mm |
| Nominal discharge | DN 300 |
| Catalogue flow range | 1,066–2,012 m³/h |
| Catalogue head range | 24–60 m |
| Largest catalogue motor for this range | 315 kW |
| Pump shaft power | 275 kW |
| Catalogue motor rating | 315 kW |
| Catalogue NPSHr | 7.1 m |
The duty point and added power/suction data refer to S 300-435(I) in the S-Series catalogue (11 March 2026), original page 37. See APP-S-CONFIG Rev. A for the selected configurations. Family ranges combine variants and impeller diameters from APP-S-DAT Rev. A; range endpoints are not paired duty points. Select the curve and motor for the actual operating range.
Shaft power is the power absorbed by the pump at this point. Catalogue motor rating is the listed driver size. Compare system available NPSH with the selected NPSHr and required engineering margin.
Higher-flow circulation screening
The 1,677 m³/h at 53 m reference supports a first comparison in the DN 300 group. Check the operating range and suction conditions together, including minimum source level or seasonal load changes.
The nominal designation describes a size family. Provide actual flow, head, speed, liquid and temperature so engineering can check the proposed operating point against the individual curve, impeller trim, power and NPSHr.
Current duty and suction conditions
Include minimum and normal operating points, source level or suction pressure, liquid temperature, suction-pipe losses and the intended speed-control arrangement. These inputs help establish whether this model is suitable for the system.
Performance Curve, GA and Replacement Fit
Request the size-specific Q/H, efficiency, power and NPSHr curves for the proposed trim and actual speed. A family coverage field and this reference table are screening aids; the selected curve establishes the duty review.
For an installed-pump replacement, send the full existing designation, nameplate and available GA. Compare suction and discharge flanges, drilling and facing, nozzle centerlines, shaft height and extension, rotation, coupling and anchor-bolt pattern. Matching numerical size codes alone do not establish interchangeability with KSB Omega or another brand.
Materials, Seals and Supply Scope
Catalogue casing options include HT250 grey cast iron, QT400-18 ductile iron and ZG230-450 cast steel. Impeller and wear-component options include the listed bronze, iron, silicon-brass and stainless grades. Choose the construction against the actual liquid, temperature and project specification.
Specify a bare pump when the existing driver is intended for reuse, or a pump, motor and baseplate set for a coordinated supply. Include the required material standard, EN 10204 3.1 records, dimensional checks and witness or third-party inspection requirements in the inquiry.
Questions About This Model
Is the reference point the full S 300-435 curve?
It is one reference at 1450 rpm. Request the individual curve at the proposed trim to confirm operating range, power and NPSHr.
Can the original motor and baseplate be reused?
They can be considered after speed, power, shaft, coupling, rotation, foundation and anchor interfaces have been reviewed.
What should I send to request a quotation?
Send the required Q/H, actual rpm or frequency, liquid, temperature and supply scope. For a replacement, add the existing nameplate and GA or available site dimensions.
Request S 300-435 Engineering Review
Open the inquiry with S 300-435 already selected, describe the required duty and attach any available curve, nameplate or drawing. The engineering team responds within 24–48 hours with the review status and next required inputs.
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