Magnet drive pump 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:
- Process oriented design
- Magnet drive
- Leakproof
- Horizontally mounted
- Modular system
- Center mounting bracket
- Oiled ball bearing
Single-stage pumps
| Technical data |
The performance characteristics can be downloaded here
Materials
Standard construction
| Component | A-8 | S-8 |
| Pump casing | 316 austenite | Cast steel |
| Impeller | 316 austenite | 316 austenite |
| Isolation shell | Hastelloy C | Hastelloy C |
| Pump shaft | 316 austenite | 316 austenite / C-steel |
| Bearing lantern/bearing carrier | Cast steel | Cast steel |
| Drive shaft | C-steel | C-steel |
Further materials such as the following are available: H-2 (Hastelloy C), A-9 (alloy-20), T-1 (titanium), D-1 (duplex).
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 +450 °C
p up to PN 150
Special constructions and higher outputs are available.
Identification code:
Suffixes (designs):
| H1 | heated pump casing |
| H2 | jacketed bearing lantern |
| F | internal filter |
| E1 | external feeding, internal secondary-flow boring enclosed |
| E2 | external flushing and venting; internal secondary-flow boring non-enclosed |
| E1F | external secondary flow with main flow filter per DGRL |
| D | double isolation shell |
| J | inducer |
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.
