NIKKISO Non seal canned motor pump

Nikkiso Non-Seal®
centrifugal canned motor pump

The NIKKISO centrifugal canned motor pump is specifically used in chemical industry for transfer and circulation tasks, particularly for supercritical fluids. The pump and motor are integrated in the sealed leak-proof structure of the centrifugal canned motor pump. The pump meets the specification of the API-685 standard.

In use, the centrifugal canned motor pump implements flow rates up to 1,200 m³/h and works with pressures up to 40 bar (at 50 Hz).

NIKKISO Non-Seal®

Centrifugal canned motor pump

The NIKKISO centrifugal canned motor pump is an ideal solution for transfer and circulation tasks in the chemical industry. It can be used to pump hazardous, toxic and supercritical fluids.

The stator has a two-layer structure, consisting of the stator liner, stator band, and extremely tight terminal strip, allowing for a higher degree of safety. With the pressure raised by the impeller, the liquid is sent to the discharge side. A part of the fluid also reaches the motor and is used to lubricate the bearings and cool the motor of the centrifugal canned motor pump. Then, this part is lead back through the extraction openings on the shaft (standard model) for the intake side.

NIKKISO Non seal canned motor pump

Good reasons for a NIKKISO Non-Seal® centrifugal canned motor pump

The NIKKISO Non-Seal is a compact centrifugal canned motor pump with integrated motor that covers high-pressure and high-temperature applications.

Integration of the motor

Directly integrating the canned motor into the centrifugal pump does not only ensure environmental protection, but also safety at the plant. All parts of the pump are also designed for easy and fast maintenance. Therefore, you can minimize unproductive down times.

Very good high-pressure characteristic

Compared to solenoid driven pumps, the NIKKISO Non-Seal centrifugal canned motor pump features considerably better high-pressure properties. Therefore, it is ideally suited for transfer and circulation tasks with critical or hazardous fluids.

High serviceability

Since the fluids lubricate the sliding parts, no additional lubrication is required. This gives the pumps a high degree of serviceability.

Low space requirement

Due to the integrated structure of the centrifugal canned motor pump, it only needs very little space and is ideal for applications in which a small footprint is required.

Quiet and low-vibration

The pump is quiet and has low vibration. It is extremely weather-resistant and has good dust protection.

Low maintenance costs

The pump has only low maintenance costs due to the relatively low number of components and the real-time monitoring of the bearing wear.

Options

API and ATEX conformity

Nikkiso centrifugal canned motor pumps comply with API 685 standards and ATEX directives and can be used for the production of most liquids in the oil and chemical industries.

Remote display for remote control

Security is the Alpha and Omega: That's why we offer the option of an integrated remote display including alarms and emergency shutdown for your canned motor pump.

Bearing monitoring

A proper process monitoring not only prevents failures, it also ensures a long lifetime of pump. To support this, we recommend at least a mechanical bearing monitoring system for the canned motor pump.

Dip tank

LEWA supplies the required accessories from a single source. For the HM pump type, a dip tank is available for feeding the rinsing liquid to the mechanical seal.

Dry-run safe

We ensure that your centrifugal canned motor pump is running as properly as possible. The Nikkiso SAO relay detects a dry-run of the pump. This provides for proper and safe operation and prolongs the service life of the pump.

Optional inducer

To improve the suction conditions (NPSHR), the Nikkiso centrifugal canned motor pumps can be equipped with an inducer.

Examination by experts and authorities

We also gladly provide performance diagrams and certificates of static pressure tests also by TÜV, Germanischer Lloyd’s, Lloyd’s R. of S. or other authorities.

Assembly on site

From engineering to commissioning – all from a single source: Our systems are suitable for sea transport and can be completely disassembled and reassembled at the destination.

DIN EN ISO 2858 – End-suction centrifugal pumps (rating 16 bar)

NIKKISO centrifugal canned motor pumps meet the dimensions and nominal outputs in accordance with DIN EN ISO 2858. This means that NIKKISO fulfills the requirements of a standardized chemical pump, which makes it easier to exchange existing pumps.

Performance data

The NIKKISO Non-Seal centrifugal canned motor pump is available in Standard and Engineered Design.

Technical data

  Standard Design Engineered Design
Flow rate max.: 780m³/h (3430 gpm) 1200 m³/h (5280 gpm)
Pump head max.: 210m (688ft) 600 m (1,970 ft)
Fluid temperature range -50 to 350°C
(-58 to 662°F)
-200 to 450 °C
(-328 to 842 °F)
Density range 0.3 to 2.0 Max. 13.6
Viscosity max. 200 mPa∙s (200 cP) 500 mPa∙s (500cP)
Working pressure max. 4 MPa (600 psig) 80 MPa (11,600 psig)
Liquid end material SUS316, SUS304 Alloy 20, Hastelloy C/B, titanium,
zirconium, etc.
Motor power range 0.4 to 132 kW
(0.5 to 177 metric horsepower)
200 to 250 kW
(268 to 335 metric horsepower)
    * "Hastelloy" is a registered trademark of Haynes International, Inc.

The NIKKISO Non-Seal pump types

For a wide variety of requirements: The spectrum ranges from all-purpose variants to special designs for high temperatures, pressures or aggressive fluids.

Type HN

Standard version

Suitable for a wide variety of clean, non-volatile liquids with moderate temperature.

  • Flow rate up to 780 m3/h
  • Head up to 210 m (300 m at 60 Hz)
  • Motor power up to 132 kW (200 kW without explosion protection)
  • Temperature -60 to +200 ÆC
  • Viscosity up to 80 cP

Type HV

High-viscosity liquids

The pump type HV is for the use of liquids with a viscosity of > 80 cP to 200 cP.

  • Flow rate up to 180 m3/h
  • Head up to 200 m
  • Motor power up to 44 kW
  • Temperature -60 to +200 °C
  • Viscosity up to 200 cP

Type HB

Jacketed casing for liquids with a high melting point

The HB type pump is equipped with a heating jacket around the pump housing, the motor stator and the rear bearing housing in order to regulate the temperature during the production of liquids with a melting point of up to 140°C.

  • Flow rate up to 160 m3/h
  • Head up to 200 m
  • Motor power up to 22 kW
  • Temperature -60 to +200°C
  • Viscosity up to 200 cP

Type HT

High temperatures with cooling

Developed for the production of hot liquids. The process liquid in the rotor compartment is circulated through the use of an auxiliary impeller. An integrated tube bundle heat exchanger as well as a spacer for thermal decoupling serve to keep the medium temperature in the motor constantly cool and thus maintain a suitable winding temperature.

  • Flow rate up to 780 m3/h
  • Head up to 210 m (300 m at 60 Hz)
  • Motor power up to 132 kW
  • Temperatures up to + 400°C
  • Viscosity up to 200 cP

Type HX

High temperatures, without requiring cooling

Specially developed for heat transfer applications. A special all-ceramic motor insulation is used with the HX pump type. For maximum system heat efficiency, an external heat insulation can be used, by which the pump will be ideally suited for conveying thermal oils. Through the use of an optional heating jacket in combination with the ceramic motor insulation, the HX type works well for the production of liquids with a high melting point (above 140 ÆC), which would exceed the upper temperature limits of the normal organically insulated materials of motors.

  • Flow rate up to 200 m3/h
  • Head up to 200 m
  • Motor power up to 55 kW
  • Temperatures up to + 350°C
  • Viscosity up to 200 cP

Types HM (mechanical seal) and HS (throttling bush)

Slurry handling pump

The supply of a clean irrigation fluid that is compatible with the pumped fluid is required. This is constantly circulated in the motor section for cooling and bearing lubrication as well as for preventing the intrusion of solids or liquids with high vapor pressure into the motor chamber. Recirculation takes place by means of an auxiliary impeller. An integrated heat exchanger dissipates the heat, created by friction or current heat losses. In order to minimize the entry of the flush fluid into the process medium, as well as to minimize their loss, the clearances are designed to be very narrow between the motor and the pump. Despite the required flush fluid (similar to conventional pumps with double seal), there is no shaft protrusion to be sealed and no gaskets. The type HM is available with a shaft seal for reduced rinsing rates. The type HS is equipped with a throttling bushing.

  • Flow rate up to 780 m3/h
  • Head up to 300 m
  • Motor power up to 200 kW
  • Temperatures up to + 400°C
  • Viscosity up to 500 cP

Type HQ

Liquid recirculation

For liquids developed with steep steam pressure curves, which would evaporate after the absorption of engine heat upon recirculation into the eye of the impeller. With the Type HQ, the circulating fluid is channeled through the motor into the vapor zone of the suction tank. The recirculation conduit is throttled so that the pressure fluid remains in the motor. It also serves as a vent conduit which is normally installed for fluids of this type.

  • Flow rate up to 180 m3/h
  • Head up to 200 m
  • Motor power up to 44 kW
  • Temperature -60 to +185°C
  • Viscosity up to 200 cP

Type HR

Liquid recirculation

Designed for fluids with extremely steep steam pressure curves. For the Type HR, the flow is channeled directly to the bearings. The return conduit is throttled so that the liquid that is pressurized remains in the engine and serves as a vent conduit for it, which is normally installed for fluids of this type. 

  • Flow rate up to 780 m3/h
  • Head up to 210 m
  • Motor power up to 132 kW
  • Temperature -60 to +185°C
  • Viscosity up to 200 cP

Multistage

Pumps with large head

Pumps for high pressure applications through multistage impeller design 

  • Flow rate up to 120 m3/h
  • Head up to 500 m
  • Motor power up to 132 kW
  • Temperature -30 to +150°C
  • Viscosity up to 140 cP

Type DN

Self-priming pump

Problems due to blockage are reduced through a self-priming diffuser chamber without foot valve.

  • Flow rate up to 180 m3/h
  • Head up to 70 m
  • Motor power up to 45 kW
  • Temperatures up to +170°C
  • Viscosity up to 200 cP
  • Self-priming head (water +20°C) up to 7 m

Industries

Oil & Gas

You can rely on 60 years of experience in the construction of pumps, packages, skids, and systems for onshore and offshore oil and gas production. Take a look at the information now!

Refineries

We have been supplying pumps and systems for distillation plants for processing crude oil for 60 years. Ask our experts for more information!

Petrochemicals

LEWA provides durable pumps and metering systems for various processes in the petrochemical industry. Ask our experts for more information!

Chemicals

LEWA supplies you with individual chemical pumps and customized system solutions for various areas of application in the chemical industry.

Plastics processing

LEWA supports you in plastics processing with custom-built plants and systems. Ask our experts for more information!

Cleaners & Detergents

We offer reliable, formula-controlled systems for the production of cleaners and detergents. Ask the LEWA experts for more information now!

Energy Utilities

We supply pumps and systems for power plants and power suppliers. Find out more about LEWA system solutions for the energy utility industry.

Other Industries

As specialists in fluid handling, we of course also have experience in many other industries. Simply contact our consultants to find out more!

Pumping solutions for mining and metal and mineral processing

Companies in the mining, metal and minerals sector all over the world rely on LEWA pumps and systems in their processes.

Applications

Amine treatment

Amine treatment LEWA provides industrial pumps and systems for amine treatment in power plants. Ask our experts for more information!

Production of biodiesel

Biofuel production LEWA provides industrial metering systems for producing biodiesel and other biofuels. Consult us!

Sulfuric acid injection in copper heap leaching

Sulfuric acid injection in copper heap leaching LEWA process pumps are used to reinject sulfuric acid at 98% into the main pipelines that go to the heap leach sprinklers.

Pumps for high temperature use

With the NIKKISO Non-Seal canned motor pump, LEWA offers a suitable solution for high temperature applications.

Industrial refrigeration

With the NIKKISO Non-Seal canned motor pump, LEWA offers suitable solutions for cold storage, cooling and freezing.

Downloads

NIKKISO Non-Seal Centrifugal Canned Motor Pump (EN)

Expansion of the product line with pumps in accordance with DIN EN ISO 2858.
449 KB | pdf | 22.02.2019

NIKKISO Non-Seal Canned Motor Pumps (ES-SA)

NIKKISO E-Monitor fue desarrollado para detectar el estado de los rodamientos de bombas herméticamente cerrados durante el funcionamiento.
3 MB | pdf | 22.02.2019

NIKKISO Non-Seal Canned Motor Pumps (EN)

NIKKISO Canned Motor Pumps are developed for the heavy duty requirements in the refinery and petrochemical industries.
4 MB | pdf | 16.04.2019

NIKKISO Non-Seal Spaltrohrmotorpumpe gemäß DIN EN ISO 2858 (DE)

Erweiterung der Produktpalette mit Pumpen gemäß DIN EN ISO 285.
451 KB | pdf | 22.02.2019

NIKKISO Non-Seal Canned Motor Pumps (PT)

As bombas centrífugas encapsuladas NIKKISO foram desenvolvidas para aplicações em refinarias e no setor petroquímico.
4 MB | pdf | 16.04.2019

NIKKISO Non-Seal Spaltrohrmotorpumpen (DE)

NIKKISO Spaltrohrmotorpumpen wurden für höchste Belastungen in Raffinerien und der Petrochemie entwickelt.
4 MB | pdf | 23.05.2019

NIKKISO Non-Seal Canned Motor Pumps (USA)

NIKKISO Canned Motor Pumps are developed for the heavy duty requirements in the refinery and petrochemical industries.
3 MB | pdf | 16.04.2019

Герметичные электронасосы НИККИСО (RU)

Герметичные насосы НИККИСО (NIKKISO Non-Seal®).
4 MB | pdf | 16.04.2019

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© 2019 LEWA GmbH