Challenges
Pulsating Flow (2 Pulses/Rev)
Bi-lobe configuration produces pronounced pressure pulsation, requiring dampeners on sensitive downstream lines.
Limited Dry-Running Capability
Rotor-to-casing clearance requires product lubrication; dry running causes rapid casing wear.
Abrasive Solid Particle Wear
Hard particles in slurry exceed clearance tolerance and score rotor and casing surfaces.
High-Pressure Slip at Low Viscosity
At viscosities below 100 cP, internal slip across rotor clearances reduces volumetric efficiency.
Noise at High Speed (>300 RPM)
Bi-lobe pulsation generates mechanical noise exceeding 85 dB(A) without acoustic enclosure.
Solutions
- Pulsation Dampener on Outlet Pipework: Bladder-type dampener reduces pressure variation to ±5% of mean discharge pressure.
- Flushed Mechanical Seal (Clean Fluid Purge): Continuous clean liquid flush prevents dry-running and cools seal faces.
- Hardened Rotor Coating (Tungsten Carbide): Extends rotor life 5× against abrasive slurries and crystalline product wear.
- VFD Speed Control (10–500 RPM): Lower speed increases residence time per cavity; restores volumetric efficiency at low viscosity.
- Acoustic Enclosure + Anti-Vibration Mounts: Reduces noise to <78 dB(A); prevents vibration transmission to connected pipework.
Applications
- Pharmaceutical: API slurry transfer, cream/ointment dosing, viscous liquid metering, GMP hygienic transfer.
- Food & Beverage: Jam, honey, chocolate, cream, fruit pulp, sauce and thick beverage transfer.
- Dairy: Cream, yogurt, cheese curd, whey concentrate, condensed milk gentle transfer.
- Cosmetics: Lotion, gel, cream, and paste transfer without shear-induced phase separation.
- Chemical: Resin, adhesive, polymer, and lubricant positive-displacement transfer.
Product Catalogue & Technical Datasheet
Model | Flow Rate (m³/h) | Speed (RPM) | Diff. Pressure (bar) | Viscosity Max (cP) | Inlet/Outlet Ø (DN) | Suction Lift (m) | Cavity Vol. (cm³/rev) | L × W × H (mm) | Weight (kg) |
BL-004 | 0.5–4 | 10–300 VFD | Up to 15 | 500,000 | DN 25 | Up to 8 | 20 | 380×200×280 | 28 |
BL-012 | 2–12 | 10–300 VFD | Up to 15 | 500,000 | DN 40 | Up to 8 | 60 | 450×240×320 | 42 |
BL-030 | 5–30 | 10–300 VFD | Up to 15 | 500,000 | DN 65 | Up to 8 | 150 | 560×290×390 | 68 |
BL-060 | 10–60 | 10–250 VFD | Up to 15 | 500,000 | DN 80 | Up to 8 | 300 | 680×350×460 | 105 |
BL-120 | 20–120 | 10–200 VFD | Up to 12 | 500,000 | DN 100 | Up to 8 | 600 | 820×420×550 | 165 |
BL-200 | 40–200 | 10–200 VFD | Up to 12 | 300,000 | DN 125 | Up to 8 | 1,000 | 980×500×650 | 240 |
BL-350 | 80–350 | 10–150 VFD | Up to 10 | 200,000 | DN 150 | Up to 6 | 1,800 | 1,200×620×780 | 360 |