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KLAUS UNION GmbH & Co. KG
Blumenfeldstraße 18
D-44795 Bochum
Tel: +49 234 4595-0
Fax: +49 234 4595-7000
www.klaus-union.de




SLM NV magnet drive pump according to DIN EN ISO 2858, in a modular design

The standard construction comes with numerous options that make the pump extremely versatile:

SLM NVN / NVS / NVO (bearing carrier version)

Design features

  • Process oriented design
  • Magnet drive
  • Leakproof
  • Horizontally mounted
  • Modular system
  • Greased ball bearings (NVN / NVS)
  • Oiled ball bearings (NVO)

Optional features

  • Heated pump casing
  • Jacketed bearing lantern
  • Thermal barrier
  • Secondary seal
  • Double-wall isolation shell
  • Leakproof, non-metallic isolation shell
  • Internal filter 
  • Inducer
  • External feed connection

Technical data
Q up to 3500 m³/h with 50Hz / up to 4200 m³/h with 60Hz
H up to 150 m with 50Hz / up to 215 m with 60Hz
t from -50 °C up to +250 °C (NVN / NVS) up to +300 °C (NVO)
p = PN 16
Special constructions up to PN400
Higher outputs available.

Materials
Standard construction
Standard construction
Pump casing: 316 SS or nodular iron
Impeller 316 SS
Isolation shell: 316 Ti/Hastelloy C4
Magnet carrier: 316 Ti
Internal bearings: silicon carbide
Bearing lantern: nodular iron
Bearing carrier: ductile iron
Other materials available

SLM NVB (close coupled configuration)

Design features

  • Close coupled configuration
  • Process oriented design
  • Magnet drive
  • Leakproof
  • Horizontally mounted
  • Modular system

Optional features

  • Heated pump casing
  • Jacketed bearing lantern
  • Thermal barrier
  • Secondary seal
  • Double-wall isolation shell
  • Leakproof, non-metallic isolation shell 
  • Internal filter 
  • Inducer
  • External feed connection

Technical data
Q up to 200 m³/h with 50Hz / up to 280 m³/h with 60Hz
H up to 60 m with 50Hz / up to 85 m with 60Hz
t from -120 °C up to +160 °C (no thermal barrier) up to +250 °C (with thermal barrier )
p = PN 16
Special constructions up to PN400
Higher outputs available.


Materials
Standard construction
Standard construction
Pump casing: 316 SS or nodular iron
Impeller 316 SS
Isolation shell: 316 Ti/Hastelloy C4
Magnet carrier: 316 Ti
Internal bearings: silicon carbide
Bearing lantern: nodular iron
Other materials available

Magnet drive pump SLM NV...OT for solids-containing liquids.

This series of pumps is the buildout and continuation of our NV modules. This type of pump is used for situations where liquids containing relatively large particles must be transported safely and without leakage.
The pump's greatest advantage is that it has no external feeding connections, thus avoiding a great deal of monitoring effort and/or pressure blanketing.


Design Features

  • Process oriented design
  • Leakproof
  • Horzintally mounted
  • Modular system
  • Non-metallic casing cover
  • Greased ball bearing
  • Thermal barrier
  • Secondary seal

Technical data
Q up to 300 m³/h with 50Hz / up to 360 m³/h with 60Hz
H up to 100 m with 50Hz / up to 145 m with 60Hz
t from -50 °C up to +180 °C
p up to PN 16
Special constructions and higher outputs available.


Materials
Standard construction
Pump casing: 316 SS or nodular iron
Impeller 316 SS
Isolation shell: CFK/PTFE or zirconium oxide
Magnet carrier: 316 Ti
Internal bearings: silicon carbide
Bearing lantern: nodular iron
Bearing carrier: ductile iron
Other materials available

SLM NVH (high-pressure applications)

Design features

  • Single-stage centrifugal pump
  • Process oriented design
  • High-pressure model
  • Magnet drive
  • Leakproof
  • Horizontally mounted
  • Modular system
  • Oiled ball bearing

Technical data
Q up to 1,000 m³/h with 50Hz / up to 1,200 m³/h with 60Hz
H up to 150 m with 50Hz / up to 215 m with 60Hz
t from -50 °C up to +300 °C
p up to PN 400
Higher outputs available.

Materials
Standard construction
Pump casing: 316 Ti
Impeller 316 SS
Isolation shell: titanium
Magnet carrier: 316 Ti
Internal bearings: silicon carbide
Bearing lantern: nodular iron
Bearing carrier: ductile iron
Other materials available

Identification code:



Bearing carrier realizations:

Bearing carrier 

Realization

Comments

SLM NVN / NVE

Standard

Standard length/greased

SLM NVS

Standard

Greased, with deep groove ball bearing

SLM NVO / NVEO

Standard

Oiled, with deep groove ball bearing

 
Close coupled configuration:

Variants

Realization

Comments

SLM NVB / NVEB

Close coupled pump

Motor support stand (without shaft coupling)                

 
Suffixes (designs):

H1

heated pump casing

H2

jacketed bearing lantern

S

thermal barrier without secondary seal

W

thermal barrier with secondary seal

F

internal filter

Z, C

isolation shell made of zirconium oxide (Z); isolation shell with CFK plastic cladding (C)

E1

external feed connection, internal secondary-flow boring enclosed

E2

external flushing connection and venting; internal secondary-flow boring non-enclosed

E1F

external secondary flow connection with main flow filter per DGRL

OT

pump without secondary flow (see description of SLM NV OT)

D

double isolation shell

J

inducer

L

Secondary sealing between the anti-friction bearings

 

Design variants

Heated pump H1 and/or H2
The pumps are outfitted with a heat jacket and pump casing (H1) and/or a heat jacket in the bearing lantern (H2). Both heat jackets can be realized either separately or in conjunction with a bypass line. The heat jackets in the standard construction are rated for operating pressure of 16 bar at 200 °C (steam) or 6 bar at 350 °C. The heat jackets can also be used for cooling.

S or W thermal barrier and secondary seal
The thermal barrier acts as a structural element between the bearing carrier (in the bearing carrier model) or drive motor (in the close coupled model), whereas the hydraulic system allows for heat transfer. This reduces ball bearing temperatures in the gearing when hot liquids are being transported. A radial shaft sealing ring can also be integrated into the thermal barrier for purposes of sealing the magnet driver. The sealing ring acts as a secondary seal that prevents the product from leaking into the environment through a leak in the isolation shell. In order for this secondary seal to be used, the magnet driver chamber must be monitored so that leaks can be detected in good time.

Isolation shell made of zirconium oxide Z

This isolation shell generates no Eddy Current losses in the magnet drive. This isolation shell offers maximum pump effi ciency and is particularly benefi cial where heat input into the pumped liquid is to be avoided.

Plastic isolation shell C

The plastic isolation shell consists of two separate components â?? a carbon fi bre reinforced outer shell, and an inner PTFE liner. The shell eliminates Eddy Current losses and is used to maximise the pumpâ??s over-all efficiency, or when a temperature rise of the internal flush flow must be avoided.

External feed and flushing connections E1 and E2
These external connections allow for external flushing, feeding and/or venting. Connection E1 is used in situations where a continuous feed into the magnet drive is desired. Connection E2 is used suitable for short-term flushing, or for external venting of the magnetic coupling.

External recirculation via discharge filter E1F

The self-cleaning discharge fi lter is used for applications where liquids with a moderate percentage of solids are handled. The flush flow is picked up externally from the discharge filter and re-introduced into the magnet coupling. The internal flush flow ports are closed.

Construction without flush flow OT

This construction type is used for applications where liquids with a high percentage of solids are handled. The casing cover is equipped with two external connections for feeding and draining of the isolation shell area. The specially designed journal bearings prevent any solids within the pumped liquid from entering the magnet drive.

Double isolation shell D
The double isolation shell should be used in situations requiring a high level of safety. The unit consists of two interlocking isolation shells, both of which are rated for the relevant operating conditions. If one of the two units is damaged, the casing still remains leaktight. The gap between the two units can be monitored.

Inducer J
Inducers are often used in cases where the installation's NPSH values are extremely low. Inducers substantially reduce pump NPSH throughout the installation without altering pump characteristics. Inducer J can be retrofitted on existing pumps, in most cases with only a minimum amount of pump modification.

Internal filter F

When solids-containing liquids are being transported, the internal filter prevents inadmissibly large particles from entering the flow channels, and from there the magnetic coupling and internal bearings.

Secondary sealing between the anti-friction bearings L

The secondary sealing consists of a highperformance radial shaft seal ring, which ensures that there is no immediate leakage of the liquid to the atmosphere in the drive shaft area in the event of an isolation shell failure.