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Grundfos UNILIFT AP35B – drainage pump with free passage 35 mm
Grundfos UNILIFT AP35B is a single-stage submersible pump from the AP Basic series, designed for pumping wastewater with a free passage of 35 mm. The pump is suitable for drainage, grey water, treated water from grease filters and applications with larger particles. It is approved according to EN 12050-1 for use in lifting stations containing faecal matter.
Main advantages of UNILIFT AP35B
- 35 mm free passage for larger particles and fibers.
- Vortex impeller for minimal risk of clogging.
- Approved according to EN 12050-1 for lifting stations with faecal matter.
- All hydraulic parts made of stainless steel for long life.
- Cooling jacket for continuous operation in partial immersion.
- Highly reliable mechanical shaft seal with oil chamber.
- Glass-sealed cable entry to prevent water ingress.
- Easy access for replacing consumables – cable, float, bearing seal, impeller and rotor.
Applications
- Drainage and drainage of rainwater from roofs, parking lots and other surfaces.
- Pumping grey water from washing machines, sinks, showers and bathrooms.
- Treated water from grease filters in commercial kitchens and restaurants.
- Domestic wastewater from septic and sludge systems.
- Drainage of viaducts, underpasses and other infrastructure sites.
- Liquids containing fibers from light industry, laundry and textile applications.
- Installation in lifting stations with auto-coupling and guide rails.
Suitable liquids
- Clean, non-aggressive water.
- Slightly polluted grey wastewater.
- Drainage and rainwater with small impurities.
- Treated water from grease filters.
- Liquids containing fibers and larger particles up to 35 mm.
General technical characteristics
| Characteristics | Value |
|---|---|
| Pump type | Single-stage submersible drainage pump |
| Working fluid | Clean, non-aggressive water and grey waste water |
| Maximum particle size | 35mm |
| Liquid temperature range | 0–40 °C (with short periods up to 70 °C) |
| pH range | 4–10 |
| Degree of protection | IP68 |
| Insulation class | F (155 °C) |
| Maximum immersion depth | 10 m |
| Output connection | Rp 1½" (AP35.40) or Rp 2" (AP35.50) |
| Cooling | From the pumped liquid via a cooling jacket and internal riser pipe |
| Engine protection | Blockage protection and thermal protection included |
| Impeller type | Vortex, stainless steel, with L-shaped blades and protective cap |
| Sealing gasket | Mechanical seal combination with bellows and lip seal with 60 ml oil |
Installation
UNILIFT AP35B is suitable for permanent and portable installations. The pump can be installed vertically, inclined or horizontally, with the outlet opening at the highest point. It is available with a float for automatic start/stop or without a float for manual control via an external controller. It is suitable for installation on auto-coupling with guide rails in pumping stations.
Operating modes
- Automatic mode: With float for automatic start/stop between two liquid levels.
- Manual mode: Without float, controlled by external controller or manual on/off.
- Single-phase pumps: With built-in thermal protection and capacitor.
- Three-phase pumps: Without built-in protection, require an external controller with motor protection.
Component materials
The UNILIFT AP35B is constructed entirely of stainless steel for all hydraulic parts, which ensures exceptional strength, corrosion resistance and long service life.
| Component | Material | Standard |
|---|---|---|
| Pump housing | Stainless steel | 1.4301 / AISI 304 |
| Lifting pipe | Stainless steel | 1.4301 / AISI 304 |
| Impeller | Stainless steel | 1.4301 / AISI 304 |
| Pump shirt | Stainless steel | 1.4401 / AISI 316 |
| Shaft (wet part) | Stainless steel | 1.4301 / AISI 304 |
| Camps | Heavy-duty, pre-lubricated ball bearings | - |
| O-rings | NBR rubber | - |
| Screws | Stainless steel | 1.4301 / AISI 304 |
| Oil | Shell Ondina X420 | - |
| Cable | Neoprene (H07RN8-F) | - |
Advantages of materials
- AISI 304 stainless steel: High corrosion resistance and strength for all main hydraulic components.
- Stainless steel AISI 316: The pump jacket is made of higher grade stainless steel for additional protection against corrosion.
- Vortex impeller: Reduces the risk of fiber clogging and provides a free passage of 35 mm.
- Mechanical shaft seal with oil chamber: Protects seals and motor from water ingress and extends service life.
- Heavy-duty bearings: Pre-lubricated and sealed for long life and quiet operation.
- Neoprene cable: High quality, waterproof cable, suitable for submersible work.
Approvals and certificates
Grundfos UNILIFT AP35B has the necessary safety and quality approvals and certificates that guarantee reliable operation in domestic, commercial and industrial applications, including lifting stations with fecal matter.
Major approvals
- CE marking: The pump complies with the requirements of European directives for safety, health and environmental protection.
- EN 12050-1: Approval for use in lifting stations containing faecal matter. This approval ensures that the pump is suitable for applications with higher safety and reliability requirements.
- EN 60335-2-41: Safety standard for submersible sewage pumps.
- ISO 9906: Standard for hydraulic performance of pumps.
Why are approvals important?
- Health and Safety: Approvals ensure that the pump meets strict safety and reliability standards.
- Regulatory compliance: The use of approved products is mandatory in many countries for installations related to wastewater disposal, especially in faecal matter plants.
- Trust and quality: Certified products have passed rigorous testing and meet high quality standards.
- EN 12050-1: This approval is particularly important for applications where the pump will be working with fecal matter and a higher level of reliability and safety is required.
UNILIFT AP35B model comparison
UNILIFT AP35B is available in several versions according to the outlet diameter (40 or 50), power (06, 08), voltage (1-phase 230 V or 3-phase 400 V) and control (automatic with float or manual). The main models are AP35.40.06 and AP35.40.08.
| Characteristics | AP35.40.06 | AP35.40.08 |
|---|---|---|
| Output diameter | Rp 1½" | Rp 1½" |
| Power P2 (50 Hz) | 0.6kW | 0.7kW |
| Power P1 (50 Hz) | 0.9kW | 1.1–1.2kW |
| Rated current (1×230 V) | 4.0A | 5.5A |
| Starting current (1×230 V) | 17.3A | 23.0 A |
| Rotation speed (50 Hz) | 2810–2830 rpm | 2795–2820 rpm |
| Maximum pressure | ~9.5m | ~12m |
| Maximum flow rate | ~16 m³/h | ~20 m³/h |
| Weight (net) | 13.0–13.3 kg | 13.5–13.9 kg |
| Voltage | 1×230 V or 3×400 V | 1×230 V or 3×400 V |
| Management | Automatic (A) or manual | Automatic (A) or manual |
| Free passage | 35mm | 35mm |
| Approval | EN 12050-1 | EN 12050-1 |
Which model to choose?
- AP35.40.06: Suitable for small and medium installations with moderate head (up to 9.5 m) and flow rate. Ideal for pumping grey water, drainage water and treated water from grease filters in small commercial and domestic applications.
- AP35.40.08: More powerful model with up to 12 m head and higher flow rate. Suitable for more demanding applications where higher head or higher flow rate is required, such as larger pumping stations, industrial applications and sites with higher requirements.
The technical specifications are in accordance with the provided Grundfos UNILIFT AP35B technical catalogue. Please check the specific product number, voltage, cable length, control type (automatic or manual) and number of phases before ordering.