Estigia

Summary

Product identification

The KSB Estigia is a vertical immersion pump designed for installation in closed tanks under atmospheric pressure. It is a single-stage volute casing pump, built in accordance with DIN EN ISO 5199 (with comments).

Key design features:

• Pump casing: Radially split volute casing with integrally cast pump feet and replaceable casing wear rings.
• Drive: Coupling between pump and motor.
• Shaft seal: Double mechanical seal or lip seal.
• Impeller types: Various application-oriented impeller types, including Closed (C), Channel (K), and Vortex (F).
• Bearings: Various application-oriented bearings.
• Automation options: PumpDrive, PumpMeter, KSB SuPremE.

Operating limits

• Flow rate (Q):
  • ≤ 1160 m³/h (50 Hz)
  • ≤ 1450 m³/h (60 Hz)
• Head (H): ≤ 110 m (both 50 Hz and 60 Hz)
• Fluid temperature (T): ≥ -30 °C to ≤ +100 °C (both 50 Hz and 60 Hz)
• Operating pressure (p): ≤ 16 bar (both 50 Hz and 60 Hz)
• Connection flange (DN): 25 - 250 (both 50 Hz and 60 Hz)
• Maximum immersion depth: ≤ 6 m (both 50 Hz and 60 Hz)
• Maximum speed:
  • ≤ 3000 rpm (50 Hz)
  • ≤ 3600 rpm (60 Hz)
• Tank pressure: Designed for atmospheric or slightly pressurized tanks. Not for use in tanks under vacuum. The pressure inside the tank must always be higher than the pressure outside. Maximum permissible pressure differences between inside and outside the tank vary by flange DN, e.g., 0.500 bar for DN500-DN700, down to 0.100 bar for DN1800.

Feed water / Product water

Fluids handled:

• Inorganic fluids
• Organic fluids
• Lubricating oils and sealing oils
• Hot water
• Water containing paint
• Water containing sand
• Condensate
• Wash water
• Solvents
• Seawater
• Cooling water

Impeller characteristics based on fluid properties:

• Closed Impeller:
  • Applications: Clean fluids (max. suspended solids content: 50 ppm, 0.50 µm), containing no or very little trapped gas (≤ 2 %).
  • Disadvantages: Not suitable for handling solids in suspension.
  • Bearings: Plain bearings made of SiC/SiC, lubricated by the fluid handled.
• Channel Impeller:
  • Applications: Contaminated fluids containing solids (approx. 3 %, non-abrasive). For water containing sand: max. 6 g/l (at 1000 rpm max., and hard material). Containing no or very little trapped gas (≤ 2 %).
  • Disadvantages: Limited allowable solids size, not suitable for solid particles liable to deposit.
  • Bearings: Plain bearings lubricated by clean external liquid.
• Vortex Impeller:
  • Applications: Contaminated fluids containing long fibres and stringy material (5 % of suspended solids). Large free passage. Allowable gas content (up to 8 %).
  • Disadvantages: Low efficiency, high NPSHR.
  • Bearings: External grease lubrication using an electrically driven auxiliary pump.

Electrical

• Motor type: KSB surface-cooled IEC three-phase current squirrel-cage motor.
• Frequency: 50 Hz/60 Hz.
• Enclosure: IP55.
• Thermal class: F with temperature sensor (3 PTC thermistors).
• Duty type: Continuous duty S1.
• Motor rating (PN): From 0.75 kW to 132.00 kW.

Mechanical / hydraulic

Materials:

• Volute casing: Grey cast iron EN-GJL-250 / A 48 Cl. 35B; Stainless steel 1.4408 / A743 Gr. CF8M; Noridur 1.4593/1.4517 / A 995 CD 4MCuN.
• Casing cover: Grey cast iron EN-GJL-250 / A 48 Cl. 35B; Stainless steel 1.4408 / A743 Gr. CF8M; Noridur 1.4593/1.4517 / A 995 CD 4MCuN.
• Shaft: Tempered steel C45+N / A 108 UNS G10450; Stainless steel 1.4404 / AISI 316L; Stainless steel 1.4462 / UNS S31803.
• Impeller: Grey cast iron EN-GJL-250 / A 48 Cl. 35B; Stainless steel 1.4408 / A743 Gr. CF8M; Noridur 1.4593/1.4517 / A 995 CD 4MCuN; Norihard EN-GJN-HB555(XCR14).
• Drive lantern: Grey cast iron EN-GJL-250 / A 48 Cl. 35B; Structural steel.
• Bearing cartridge: SiC/SiC.
• Bearing sleeve: SiC/SiC.
• Bearing bush: PTFE-GF25.
• Cover plate: Steel, painted.

Bearings:

• Plain bearings: SiC/SiC, PTFE-GF25.
• Double angular contact ball bearings: 3307 2RS C3, 3310 2RS C3, 3312 2RS C3, 3314 2Z C3.
• Lubrication options:
  • By fluid handled (for clean and non-aggressive fluids without particles).
  • By external liquid (clean water or compatible liquid injected at approximately 3 kg/cm² pressure).
  • By electrically driven pump (with grease reservoir).

Coating and preservation: Various KSB coating codes (E1, E2, P1, P2) are available, specifying pre-treatment (e.g., blast cleaning Sa 2½), primer coats (e.g., Epoxy polyamide with zinc phosphate, Epoxy zinc silicate), intermediate coats (e.g., Epoxy micaceous iron oxide), and top coats (e.g., Epoxy polyamide, Polyurethane) with specified film thicknesses ranging from 50 µm to 130 µm.

Flange design:

• Suction side DN1: Axial position, PN 16 pressure class, RF design, Type 21-B. Standard material variant uses EN 1092-2, while stainless steel/Noridur variants use EN 1092-1. Optional: ASME16.5.
• Discharge side DN2: Radial position, PN 16 pressure class, RF design, Type 21-B. Standard material variant uses EN 1092-2, while stainless steel/Noridur variants use EN 1092-1. Optional: ASME16.5.
• Discharge side DN3: Axial position, PN 16 pressure class, FF to DIN EN 1092-1 design, Type 01-A. All material variants use EN 1092-1. Optional: ASME Class 150, RF to ASME 16.5.

Dimensions and technical data: Detailed tables are available in the official PDF for pump dimensions, immersion depths, impeller characteristics (e.g., free passage, max/min diameter, mass moment of inertia), and motor dimensions for various sizes and configurations. See the official PDF for exact tabulated values.

Product benefits

• Optimised hydraulic characteristics for excellent efficiency and NPSH.
• Reduced operating costs through impeller trimming, optimised spare parts concept, and hard-wearing design.
• Service-friendly design for easy and fast dismantling.
• Integral cover plate simplifies pump installation and acts as a tank cover.
• Maintenance-free with grease-packed bearings sealed for life.
• Vertical design with a small footprint.
• Long service life due to high-quality plain bearings with long inspection intervals.

Acceptance tests and warranty

• Materials inspection and testing: Test report 2.2 and inspection certificate 3.1 available on request.
• Final inspection: Inspection certificate 3.1 to EN 10204 available on request.
• Hydraulic test: Duty point guaranteed to ISO 9906/3B for Europe or ISO 9906/3 for outside Europe.
• Optional tests (at extra charge): Performance test to ISO 9006/2B, other tests (e.g., vibrations, strength, noise characteristics) on request.
• Warranty: Provided within the scope of the valid terms and conditions of sale and delivery.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror