Biogas Rotary Lobe Pump / Abrasive Biogas Substrate / Low-Wear /
Resistant To Pressure
An operator of a biogas plant was looking for a reliable pump for
pumping very abrasive biogas
substrate from a fermenter into a secondary fermenter. The rotary
lobe pump which had been
used before had a very high wearing of rotors.
It was very important for the operator of the biogas plant to use a
pump in his plant, which has
high durability, works low-wear and is easy to maintain in case of
maintenance. Because of the
design of the pipe connection system, the pump had to manage an
underpressure of -0.4 bar.
The customer chose a Accuvon rotary lobe pump AF 125. The speed of
the AF 125 is controlled
via a frequency converter, depending on the underpressure. The
underpressure as well as the
pumping pressure will be measured with electronic manometers.
The customer is very satisfied with the Accuvon AF 125.
Accuvon products in agriculture and biogas
| 1 | • Biogas plants |
| 2 | • Vat filling station |
| 3 | • Silages |
| 4 | • Mobile liquid manure pump |
| 5 | • Fermenter |
| 6 | • Separation |
| 7 | • Solids supply |
Application Data:
| Pump type | Accuvon AF 125 |
| Pumped medium | renewable-biogas substrate |
| Temperature | 20 - 40°C |
| Rated capacity | 32 - 80 m³/h |
| Speed | 110 - 276 rpm |
| pH-value | neutral |
| Entrance pressure | -0.4 bar |
| Working pressure | up to 4 bar |
Technical Data:
| Casing | Grey cast iron |
| Radial casing liners | Hart metal |
| Casing protection plate | Hart metal |
| Mechanical seal | SIC / SIC |
| O-Rings | NBR |
| Shaft seals | NBR |
| Rotors | dual-lobe, linear, Premium profile, steel |
| Drive | Helical gear motor, 22 kW |
Advantages of this Accuvon AF 125
| 1 | - Free ball channel Ø 75 mm |
| 2 | - Low-wear biogas rotor with Premium profile |
| 3 | - Electronic protection from running dry |
| 4 | - Pumping of abrasive Media |
| 5 | - Resistant to pressure |
| 6 | - Medium unwetted shafts |
| 7 | - Self-priming |
| 8 | - Temperature sensor in the pump casing |
| 9 | - Adjustable speed, depending on entrance pressure via frequency
converter |
| 10 | - Ease of maintenance (Maintenance in Place) |
operating principle
• Self-priming, valveless, positive displacement pump
• Designed with two shafts with parallel axes
• The shafts move relatively to one another thanks to external
timing gear
• The displacers (=rotors) roll off each other with minimum axial
and radial clearance
• In every position, the rotors and casing close the suction
chamber against the pressure chamber
• Gentle, low-pulsation pumping
• For viscous, solid, abrasive or shear-sensitive media
Accuvon's range of rotors –the Premium rotor
Premium profile– of biogas rotors
• Large sealing area
• Effective wiper edge
• Pressure-resistant
• Made of steel, stainless steel or plastic
axial and radial casing protection
To protect the pump casing from abrasive media and solids, we
developed replaceable casing protection plates and liners several
years ago.
The casing protection is replaced in a few steps, based on the MIP
principle.
Easy maintenance– Maintenance in Place
• Reduced maintenance times and downtimes
• Maintenance at installation site by customer's in-house staff
