Grundfos SFG.32.260 .34.5.1B (98787871)
Product ID: 98787871
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Grundfos SFG.32.260 .34.5.1B (98787871)
The Grundfos range of horizontal submersible SFG flowmakers is designed for applications involving the mixing of large volumes in biological treatment plants where the flowmakers help to keep solids suspended in the liquid. The flowmakers are equipped with a gearbox and a large diameter propeller for energy-efficiency.
The squirrel-cage induction motor is protected against overload by means of three thermistors (PTC sensors) in the motor windings.
The products are equipped with IE3 motor components.
To prevent ingress of the surrounding liquid, the flowmakers have two radial FKM rubber lip seals together with a ceramic wear ring and a mechanical shaft seal made of silicon carbide/silicon carbide or tungsten carbide/tungsten carbide, depending on size. The secondary seal between the gearbox and the motor is made of carbon/aluminium oxide.
The oil-filled gearbox is monitored for the ingress of water by a leak sensor incorporated as standard in the seal housing. The sensor can trigger an alarm signal and/or switch off the motor by means of an external Grundfos relay, type ALR-20/A.
The gearbox incorporates tapered roller bearings absorbing the axial force from the propeller.
Motors range from 0.7 to 8.0 kW.
A wide range of accessories made of stainless steel AISI304/316 ensures easy installation and long trouble-free operation.
| Technical: | |
| Thrust to power: | 0.980 |
| Axial trust force: | 3370 N |
| Rated flow: | 2990 l/s |
| Mean velocity: | 0.56 m/s |
| Propeller speed: | 34 rpm |
| Tip speed: | 4.63 m/s |
| Gear ratio: | 29.000 |
| Propeller diameter: | 2600 mm |
| Number of propeller blades: | 2 |
| Primary shaft seal: | 2 RADIAL LIP SEALS |
| Testing standard: | ISO 21630 |
| Materials: | |
| Motor: | AISI EN-GJL-250 |
| Hub: | AISI EN-GJS-400-15 |
| Paint thickness: | 450 micrometre |
| Secondary shaft seal: | CARBIDE/CARBIDE |
| Installation: | |
| Maximum installation depth: | 20 m |
| Fits column profile tube, size: | 120/120 mm |
| Liquid: | |
| Liquid temperature range: | 5 .. 40 °C |
| Electrical data: | |
| Power input - P1: | 3.7 kW |
| Power input Act: | 3.44 kW |
| Rated power - P2: | 3.2 kW |
| Mains frequency: | 50 Hz |
| Rated voltage: | 3 x 400-415 V |
| Voltage tolerance: | +6/-10 % |
| Rated current: | 8.8 A |
| Starting current: | 84 A |
| Cos phi - power factor: | 0.63 |
| Cos phi - p.f. at 3/4 load: | 0.53 |
| Cos phi - p.f. at 1/2 load: | 0.4 |
| Rated speed: | 975 rpm |
| Motor efficiency at full load: | 86.9 % |
| Motor efficiency at 3/4 load: | 85.3 % |
| Motor efficiency at 1/2 load: | 81.4 % |
| Number of poles: | 6 |
| Start. method: | star/delta |
| Enclosure class (IEC 34-5): | IP68 |
| Insulation class (IEC 85): | H |
| Explosion proof: | no |
| Built-in motor protection: | PTC THERMISTOR |
| Length of power cable: | 15 m |
| Power plug: | No plug |
| Controls: | |
| Moisture sensor: | without moisture sensors |
| Water-in-oil sensor: | with water-in-oil sensor |
| Others: | |
| Net weight: | 318 kg |
Applications
- Wastewater treatment — Treating wastewater is about maintaining optimal and effective processes at mechanical, biological and chemical treatment stages. A full-line supplier, Grundfos ensures that hydraulic stability is maintained and capacity not exceeded for all processes.
category
- AgitatorsAgitators, such as small-scale submersible mixers and large-scale flowmakers, are designed for prefabricated pumping stations and large tanks respectively. They ensure that particles remain evenly distributed in wastewater and sludge, preventing sedimentation and supporting treatment processes.
- Submersible wastewater pumpsGrundfos submersible wastewater pumps are designed as sealed units combining a pump and integrated motor that can operate below the surface of wastewater. Submersible wastewater pumps are perfect in permanent installations for efficient removal of wastewater from a property whether from washing machines, sinks and showers or drainage from the garden.