KSB Omega & Omega V Replacement Pumps
Replace your installed Omega or Omega V with a pump reviewed for duty and dimensional fit. Send the model, nameplate or GA drawing to get started.
Engineering response in 24–48 hours Hydraulic review · Interface check · Defined supply scope
S-Series split-case pumps · ANSI Pumps Pro
A clear path to your replacement
From the installed pump to a confirmed supply scope in four steps.
Identify
Existing manufacturer, full model designation, serial / nameplate ID.
Match Duty
Flow, head, speed, frequency, liquid and temperature.
Verify Fit
Flanges, shaft centerline, footprint, rotation and coupling interface.
Quote Scope
Bare pump, complete pump set, or project-specific replacement package.
Replacement fit, confirmed against your installation
Our S-Series is built to GB/T 5657 technical specifications. That standard does not create a universal dimensional interchange between S-Series and KSB Omega pumps. We compare the installed GA and site interfaces with the proposed pump configuration.
A confirmed direct match can be supplied as a dimensional replacement. Where an interface differs, the quotation identifies the transition baseplate, spool arrangement, coupling or other adaptation before manufacture.
Replacing a vertical Omega V installation
Send the full Omega V designation, nameplate, GA and photographs of the driver support and pipe connections.
Include the interfaces around the pump
- Full installed model and arrangement
- Driver mounting and support dimensions
- Suction and discharge flange levels
- Foundation and anchor-bolt positions
- Overall height and rotor-removal space
The review records matched interfaces, adaptations and missing site measurements against the installed and proposed drawings.
OA / OB names identify S-Series reference arrangements; fit is confirmed against your installed drawing.
Build your replacement brief
Enter what you know. Add interface dimensions if available, then carry the brief into your inquiry below.
- Identify the installed pump
- Add duty and available dimensions
- Build the brief and continue to inquiry
No GA drawing yet? A nameplate photo can start the review.
Add flange and motor-reuse details (optional)
Enter known dimensions and attach the applicable drawing in the inquiry. Required pressure class, flange drilling and facing are checked together.
What you receive from engineering
The review provides one documented basis for engineering, maintenance and purchasing. Each interface is marked as matched, requiring adaptation or awaiting information.
| Review area | Evidence compared | Result recorded |
|---|---|---|
| Hydraulic duty | Required Q/H, actual rpm, trim, curve and suction conditions | Candidate curve and unresolved duty or NPSH inputs |
| Piping and installation | Flange size/class/drilling/facing, nozzle centerline, orientation and GA | Matched dimensions or defined piping adaptations |
| Drive and foundation | Shaft height/extension, rotation, coupling DBSE, baseplate and anchors | Motor/coupling reuse assessment and transition requirements |
| Service and supply | Liquid, temperature, component materials, seal and inspection scope | Confirmed construction, documents and quotation scope |
Preview the interface comparison worksheet
Use this blank worksheet to collect the installed and proposed values. Engineering records the result against the corresponding drawings.
| Check | Installed pump | Proposed pump | Review result |
|---|---|---|---|
| Q / H and actual rpm | From site / existing drawing | From selected curve / GA | To be reviewed |
| Flange size, standard and drilling | From site / existing drawing | From selected curve / GA | To be reviewed |
| Nozzle position and shaft height | From site / existing drawing | From selected curve / GA | To be reviewed |
| Shaft, coupling and rotation | From site / existing drawing | From selected curve / GA | To be reviewed |
| Baseplate and anchor bolts | From site / existing drawing | From selected curve / GA | To be reviewed |
| Vertical support and removal space | From site / existing drawing | From selected curve / GA | To be reviewed |
What we check before confirming fit
These items become the proof framework for the final replacement recommendation.
Centerline & Footprint
Check center height, feet, anchor-bolt positions and foundation constraints.
Flange Arrangement
Check suction/discharge size, location, drilling and connection orientation.
Shaft & Coupling
Check shaft extension, coupling interface, rotation and motor reuse requirement.
Hydraulic Mapping
Compare Q/H, rpm, impeller trim, efficiency and NPSH requirement.
Seal & Materials
Confirm shaft seal, casing, impeller and wetted-material requirements.
Supply Scope
Choose Bare Pump, Pump + Baseplate, Pump + Motor + Baseplate, Replacement Components / Parts, or another project-specific scope.
Review replacement materials against the actual service
Review the catalog options below against liquid, temperature, wear and corrosion conditions.
Swipe to view material grades and review notes →
| Component | S-Series catalog options | Replacement review |
|---|---|---|
| Pump casing | HT250 (grey iron; compare EN-GJL-250 / ASTM A48)QT400-18 (ductile iron; compare EN-GJS-400-18-RT / ASTM A536 60-40-18)ZG230-450 (cast steel; ASTM A216 WCB comparison) | Compare existing casing material and service condition. |
| Impeller | ZCuSn10Pb1 (tin bronze; specify the ASTM B584 alloy)HT250 (grey iron; compare EN-GJL-250 / ASTM A48)ZCuZn16Si4 (silicon brass)ZG1Cr18Ni9Ti (cast stainless steel) | Review liquid chemistry, wear and corrosion requirement. |
| Shaft | 2Cr13 (13% Cr stainless; compare AISI 420 / EN 1.4021)45# (carbon steel) | Review environment and mechanical requirements. |
| Seal ring | ZCuSn10Pb1 (tin bronze; specify the ASTM B584 alloy)HT250 (grey iron; compare EN-GJL-250 / ASTM A48)ZCuZn16Si4 (silicon brass)ZG1Cr18Ni9Ti (cast stainless steel) | Review wear pair and liquid compatibility. |
EN / ASTM references guide specification review; they are not certified grade substitutions. Confirm composition, mechanical properties, section thickness, heat treatment and the required material certificate for the selected component.
Reference standards and alloy selection
ASTM A48 covers grey iron, ASTM A536 covers ductile iron and ASTM A216 covers cast carbon steel, including WCB. Select the actual grade against the project specification. For ZCuSn10Pb1, specify the required ASTM B584 alloy and chemistry rather than assume UNS C90500 equivalence. For 2Cr13, confirm the shaft condition and required heat treatment.
References: ASTM A48; ASTM A536; ASTM A216; CDA C90500 composition; Outokumpu Dura stainless grades.
Search the installed model, then start a verified review
Search the installed model and continue with a documented engineering review.
Enter the existing model
Installed-model examples Click to prefill
Use the full designation from your installed nameplate. These are inquiry examples; suffixes, duty and dimensional fit require review.
Installed-model replacement review
Choose a model example or enter the complete designation. We compare the installed duty and interfaces before confirming a replacement.
Rebuild the operating condition before forcing a cross-reference
If the plant duty has changed, the original nameplate is incomplete, or Q/H is uncertain, use the Split Case Pump Selection & Performance Guide first.
Open Selection & Performance GuideBare pump or complete replacement set
Choose the supply scope that matches your replacement project.
Bare Pump
For projects retaining the existing driver or site-specific drive arrangement.
Compare bare-pump replacement when casing erosion or quoted lead times for an impeller, shaft, wear rings or mechanical seal make overhaul uneconomical, while the motor and VFD remain serviceable.
Retain an existing serviceable motor where speed, power, shaft height and extension, coupling, rotation and baseplate interfaces can be verified. Include the driver and coupling drawings with the installed-pump GA.
Discuss bare-pump supply
Complete Pump Set
Pump, motor, coupling, guard and baseplate for a coordinated replacement package.
Confirm electrical requirements, foundation constraints and inspection records in the supply scope.
Discuss a complete pump setCompare repair and replacement scope
Compare the installed pump condition and current repair quotation with the total scope of a replacement. Include parts, labor, installation adaptations, inspection, freight and the required outage window on the same comparison basis.
Repair or component review
Consider repair when the casing and interfaces remain serviceable and the required components can be identified. Send the applicable drawing, component photos, quantity and material requirement for an independent component review.
For an energy comparison, use measured operating hours, electrical input and the proposed operating points. Record assumptions separately from the equipment quotation.
KSB Omega Replacement Questions
What can I send to start?
Send the full installed designation and a nameplate photo. Add current flow, head, speed and the GA drawing when available. The initial review lists any missing measurements or documents.
Can I retain the original piping and motor?
Yes, where the interfaces and driver requirements are verified as a direct match. The review identifies any required spool, transition baseplate or coupling change before manufacture.
Does the same numerical model code confirm interchangeability?
The code helps route the inquiry. Final fit is established from the installed drawing, hydraulic duty and interface comparison. Include the complete Omega suffixes and order/serial reference.
Can you review Omega V installations?
Yes. Send the installed arrangement, support, driver and GA details. The vertical replacement review includes flange levels, foundation interfaces and rotor-removal space.
Can I request ASTM/EN materials and EN 10204 3.1 records?
State the component, requested grade and standard in the inquiry. Material acceptance, test records and any witness or third-party inspection are confirmed in the project scope.
Where can I compare S-Series sizes and curves?
Use the S-Series size–speed directory, coverage references and duty and NPSH selection guide. Request the individual curve for the selected configuration.
Send your pump details
Tell us what you need in your own words. If you know the pump model, add it; if available, attach a nameplate photo or drawing. Our engineering team responds within 24–48 hours with the review status, interface differences and any additional data needed.