SK/SKD series

Summary

Product identification

Rovatti Pumps SK/SKD series are horizontal multistage high-pressure centrifugal pumps.

• SK series: Features single bearing support.
• SKD series: Features double bearing support.

These pumps are designed for high efficiency, robust construction, service reliability, and high safety factor, making them suitable for irrigation systems, fire-fighting, civil, and industrial applications.

General Characteristics

• Overall Capacity: Up to 540 m³/h
• Overall Head: Up to 500 m
• Overall Power: Up to 330 kW

Operating limits

• Max. solids content: 40 g/m³
• Max. water temperature: 90°C
• Max. running time at Q=0: 2 min

SK Series Operating Limits

• Max. suction pressure: 6 bar
• Max. operating pressure*:
  • SK65 models: 22 bar
  • SK80 models: 26 bar
  • SK100, SK150 models: 27 bar * Including suction pressure.
• Dynamic moment J: See the official PDF for exact tabulated values per pump model and additional stage.

SKD Series Operating Limits

• Max. suction pressure: 16 bar
• Max. operating pressure*:
  • SKD65, SKD80, SKD100 models: 50 bar
  • SKD150, SKD200 models: 40 bar * Including suction pressure.
• Dynamic moment J: See the official PDF for exact tabulated values per pump model and additional stage.
• Speed Limits: See the official PDF for exact tabulated values [min⁻¹] per pump model and lubrication type (grease, oil, oil with cooling device).

Feed water

• Reference Conditions: Cold water (20°C) at atmospheric pressure (1 bar).
• Liquid Density: 1000 kg/m³
• Kinematic Viscosity: Not higher than 1 mm²/s
• Max. solids content: 40 g/m³
• Max. water temperature: 90°C

Electrical

• Power: Up to 330 kW

Mechanical / hydraulic

• Construction:
  • SK Series: Horizontal multistage centrifugal pump with axial inlet. The outlet has an upwards delivery flange that is laterally rotatable on both sides. Features oil-lubricated bearing support.
  • SKD Series: Horizontal multistage centrifugal pump with double bearing support and an upwards delivery flange. For the SKD150 series, the inlet can be rotated by multiples of 90° to three different positions.
• Performance Guarantees: According to ISO 9906 Grade 3B norms.
• Nominal Suction Port Diameters:
  • SK65, SKD65: DN 65
  • SK80, SKD80: DN 80
  • SK100, SKD100: DN 100
  • SK150, SKD150: DN 150
  • SKD200: DN 200
• Materials (Standard SK Series):
  • Bearing support: Cast iron
  • Shaft: Steel (Stainless steel optional)
  • Twinner System® (-TB): Stainless steel
  • Stuffing-box packing (-TB): Synthetic fibers
  • Mechanical seal (-TM): Widia / Graphite
  • Impeller: Brass (for SK65-22); Cast iron + Cataphoresis (for other models); Carbon steel + Cataphoresis (for SK150). Bronze impellers are optional for some models.
  • Shaft protection bush: Chrome plated steel
  • Pump body: Cast iron (Cast iron + Cataphoresis optional for "Black" version)
  • Diffuser shell: Cast iron (Cast iron + Cataphoresis optional for "Black" version)
  • Diffuser: Cast iron (Stainless steel optional)
  • Wear ring: Cast iron (Bronze optional)
  • Journal bearing: Bronze
  • Tie rod: Steel
  • Suction bowl: Cast iron (Cast iron + Cataphoresis optional for "Black" version)
• Materials (Standard SKD65-80-100 Series):
  • Bearing support: Cast iron
  • Shaft: Stainless steel
  • Twinner System® (-TB): Stainless steel
  • Stuffing-box packing (-TB): Synthetic fibers
  • Mechanical seal (-TM): See page 15 of the official PDF.
  • Impeller: Brass (for SKD65-22); Cast iron + Cataphoresis (-GG) (for other models). Bronze (BR) impellers are optional.
  • Shaft protection bush: Stainless steel
  • Pump body: Spheroidal cast iron
  • Diffuser shell: Cast iron
  • Diffuser: Cast iron (Stainless steel optional)
  • Wear ring: Cast iron (Bronze (BR) optional)
  • Journal bearing: Bronze
  • Spacer: Brass
  • Tie rod: Steel
  • Suction bowl: Spheroidal cast iron
• Materials (Standard SKD150-200 Series):
  • Bearing support: Spheroidal cast iron
  • Shaft: Steel
  • Twinner System® (-TB): Stainless steel
  • Stuffing-box packing (-TB): Synthetic fibers
  • Mechanical seal (-TM): See page 15 of the official PDF.
  • Shaft protection bush: Steel
  • Impeller SKD150: Carbon steel + Cataphoresis (-GG)
  • Impeller SKD200: Stainless steel
  • Pump body: Spheroidal cast iron
  • Diffuser: Spheroidal cast iron
  • Wear ring: Cast iron
  • Journal bearing: Bronze
  • Spacer: Stainless steel
  • Tie rod: Steel
  • Suction bowl: Spheroidal cast iron
  • Oil box: Cast iron
• Mechanical Seal Materials (General):
  • Rotating ring: WIDIA
  • Fixed ring: Graphite
  • Flexible element: NBR
  • Spring: AISI 304 Stainless steel
• Bearing Lubrication (SKD Series): Options include grease lubrication (-GR), oil lubrication (-OB), and oil lubrication with cooling device (-LC). Specific bearing types and quantities are detailed in the official PDF.
• Rotation: Available in left or right rotation.

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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 complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror