Nocchi-VLR

Summary

Product identification

The Nocchi VLR series consists of vertical multi-stage centrifugal pumps featuring "in line" suction and delivery ports. These pumps are directly coupled with an electric motor and are non self-priming.

Models are identified by a symbol structure: VLR[T/M][F/A/V][Rated flow rate in m³/h][No. of stages X 10][X/I].

• T = Three phase
• M = Single phase
• F = Round "in line" flange
• A = Oval "in line" flange
• V = With connectors for VICTAULIC joints
• X = Materials used are AISI 316
• I = Materials used are AISI 304

Available versions:

• F: In line ports with ROUND FLANGES (counterflanges optional)
• A: In line ports with OVAL FLANGES complete with threaded counter-flange
• V: In line ports with connectors for VICTAULIC joints

Applications

The VLR series is suitable for a range of applications, including:

• Water supply
• Pressure increase systems
• Irrigation
• High pressure washing
• Fire fighting systems
• Boiler supply
• Liquid transfer

Operating limits

• Liquid temperature:
  • VLR 2B, VLR 4, VLR 8, VLR 16: from -15 to +120° C
  • VLR 32: from -20 to +120° C
  • VLR 46, VLR 66, VLR 92: from -30 to +120° C
• Max. operating pressure (including suction head):
  • VLR 2B, VLR 4, VLR 8: 16 bar (oval flanges); 25 bar (DIN flanges, max temp 40° C)
  • VLR 16: 25 bar (max temp 40° C); specific models (VLR16-30 to VLR16-100) rated at 25 bar (max temp 85° C); other specific models (VLR16-30 to VLR16-30) rated at 23 bar (max temp 120° C) or 21 bar (max temp 120° C)
  • VLR 32: 25 bar
  • VLR 46: 16 bar up to VLR 46-50; 25 bar up to VLR46-90; 40 bar up to VLR 46-130/2
  • VLR 66: 16 bar up to VLR 66-50; 25 bar up to VLR 66-80
  • VLR 92: 16 bar up to VLR 92-40; 25 bar up to 92-70/2
• Minimum suction head: NPSH plus safety margin of 0.5 m
• Maximum ambient temperature: 40° C

Mechanical / hydraulic

General construction

The VLR series pumps are vertical multi-stage centrifugal pumps with "in line" suction and delivery ports. Impellers, diffusers, and external casing are made of stainless steel. The base, head, and lantern housing are constructed from cast iron. Models VLR 32, VLR 46, VLR 66, and VLR 92 are equipped with a mechanical cartridge seal for easier replacement.

Materials of construction

• Base:
  • VLR 2B - VLR 16: Cast iron EN GJL 200
  • VLR 32: Cast iron EN GJL 500-7U
  • VLR 46 - VLR 92: Cast iron EN GJL 250
• Motor housing: Cast iron EN GJL 200
• Motor coupling:
  • VLR 2B - VLR 16: Cast iron EN GJS 400
  • VLR 32: Cast iron EN GJL 500-7U
  • VLR 46 - VLR 92: Cast iron EN GJL 200
• Casing: Stainless steel X5CrNi18-10 (AISI 304) or Stainless steel X2CrNiMo17-12-2 (AISI 316L)
• Impeller: Stainless steel X5CrNi18-10 (AISI 304) or Stainless steel X2CrNiMo17-12-2 (AISI 316L)
• Diffuser: Stainless steel X5CrNi18-10 (AISI 304) or Stainless steel Nimo17-12-2 (AISI 316L)
• Rotary gasket: Silicon carbide or Tungsten carbide
• Fixed gasket: Graphite
• Shaft: Stainless steel X2CrNiMo17-12-2 (AISI 316L), Stainless steel X17CrNi16-2 (AISI 316L), or Stainless steel X2CrNiMoN22-5-3 (AISI 316L)
• Seals: EPDM

Flanges and connections

• VLR 2B, VLR 4, VLR 8: "A" version models are supplied with oval 1" GAS flanges. "F" version models are supplied with round DIN flanges (counterflanges optional).
• VLR 16, VLR 32: Flanges are DN50 PN25 DIN 2534/ISO 7005-2 (counterflanges optional).
• VLR 46: Flanges are DN80, with pressure ratings varying by model: PN16 (VLR46-10/1, VLR 46-50); PN25 (VLR 46-60/2 to 46-90); PN40 (VLR 46-100 to 46-130/2). Counterflanges are optional.
• VLR 66, VLR 92: Flanges are DN100, with pressure ratings varying by model: PN16 or PN25. Counterflanges are optional.

Electrical

• Motor type: Electric asynchronous motor with closed casing and external ventilation.
• Standards: Main dimensions are in line with DIN and IEC standards.
• Construction design: Up to 4.0 Kw V18; From 5.5 Kw V1.
• Insulation class: F
• Protection rating: IP 55
• Rotation speed: 2900 rpm
• Bearings: Oversized for optimal load support.

Performance data

Detailed performance tables, including motor output (HP/kW), voltage, current (In), and hydraulic performance (flow rate Q in L/min or m³/h, head H in m.c.a./m.w.c.) are available for each model series (VLR 2B, VLR 4, VLR 8, VLR 16, VLR 32, VLR 46, VLR 66, VLR 92). Overall dimensions and net weights are also provided per model.

See the official PDF for exact tabulated values.

Accessories

Circular flanges, oval flanges, and VICTAULIC joints are available as accessories. Materials include steel, cast iron, and stainless steel AISI 316. Various dimensions, pressure ratings (PN), and threading options are offered.

See the official PDF for exact tabulated values.

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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. For contractual data, always refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

Lenntech datasheet mirror