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D-44795 Bochum
Tel: +49 234 4595-0
Fax: +49 234 4595-7000

Magnet drive pump in closed coupled design according to API 685

This API 685 compliant pump for refineries and petrochemical plants is based on our non-shaft seal and modular centrifugal pumps with magnetic couplings.

Design Features:

  • Closed Coupled Design
  • Magnet Drive
  • Leakproof
  • Horizontally Mounted
  • Modular System
  • Centerline Support 

 SLM APC - Pump in Closed Coupled Design acc. to API 685


Single-stage pumps

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 -120°C up to +250°C
p up to PN 50 / Class 300
Special constructions and higher outputs are available.

Standard construction



Pump Casing

Carbon Steel


316 Austenit

Wetted Parts

316 Austenit

Containment Shell

Hastelloy C

Pump Shaft

316 Austenit

Intermediate Lantern / Bearing Support

Carbon Steel

Drive Shaft

Carbon Steel

Further materials upon Request: (A-8, H-1, H-2, T-1, D-1, A-9)


Performance data for multi-stage pumps

Technical data
Q up to 450 m³/h with 50Hz / up to 540 m³/h with 60Hz
H up to 900 m with 50Hz / up to 1300 m with 60Hz
t from -120 °C up to +250 °C
p up to PN 150
Special constructions and higher outputs are available.

Identification code:

Identification Code:

SLM APC 0.30 X 01.5 X 08 A - 13E03H12


Nominal pipe size of suction flange: 3"


Nominal pipe size of discharge flange; 1 1/2"


Nominal size of impeller; 8" 


Type suffix


Magnet drive size


Type of magnet


Length of magnetic drive


Code of application


Suffixes (designs):



heated pump casing


jacketed bearing lantern


internal filter


external feeding, internal secondary-flow boring enclosed


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


external secondary flow with main flow filter per DGRL


double isolation shell



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.

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.

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.

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.