Mini DeBEE

The Mini DeBEE is a pilot-scale, high-pressure homogenizer designed to bridge the gap between R&D and production. While it can handle small R&D samples (minimum ~20 mL), its continuous flow capabilities (up to 20 L/hr) make it suitable for:

• Clinical Trial Batches: Producing Phase I/II materials.
• Pilot Scale-Up: Establishing process parameters that guarantee 100% scalability to the larger DeBEE 2000/3000 production units.
• Small-Scale Production: Manufacturing high-value biotech or pharmaceutical products.

The main differences are power and control:

• Drive System: The Mini DeBEE uses an electric-hydraulic power unit (requiring 3-phase power), whereas smaller units are often air-driven or simpler electric benchtops. This provides more consistent pressure at higher flow rates.

• Yes. Since both systems use the same patented modular Emulsifying Cell (EC) technology, results (particle size, lysis efficiency) are directly scalable. If you optimized a process on the Nano DeBEE at 25,000 PSI with a specific Nozzle, the same settings on the Mini DeBEE will yield the same product quality.

• Unlike the standard plug-in laboratory units, the Mini DeBEE typically requires 3-phase power (typically 220V or 380V, depending on your specific configuration) to drive the motor.

• @ 30,000 PSI: Up to ~20 Liters per hour (LPH).
• @ 45,000 PSI: Up to ~15 Liters per hour (LPH).

Note: Flow rates can vary slightly based on product viscosity and check valve configuration.

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• Yes. The Mini DeBEE is designed for pharmaceutical GMP environments. It can be cleaned in place by flushing cleaning agents (NaOH, water, solvents) through the system without disassembling the high-pressure cylinder or Emulsifying Cell.

• Pressure is set via the hydraulic pressure control valve (often a manual knob on the front panel). The intensifier ratio ensures that the hydraulic oil pressure translates to the high process pressure (e.g., a 1:10 or 1:20 intensification ratio).

• Hydraulic Oil: Check the oil level and temperature gauge daily. The hydraulic oil should be changed annually or every 2,000 operating hours.
• Oil Filter: Replace the hydraulic oil filter during the oil change to protect the pump.
• Cooling Water: Ensure the heat exchanger for the hydraulic oil (distinct from the product heat exchanger) is receiving water flow to prevent the oil from overheating.

• Plunger Seal: Leakage into the "barrier" or rinse chamber (visible dripping behind the cylinder).
• Check Valve (CV) O-Rings: Fluctuating pressure or inability to reach target pressure often indicates a worn static seal or a pitted valve seat.

• Yes. The EC is modular. You can swap between Parallel Flow (Cavitation, laminar shear), Reverse Flow (Shear/Impact), or change nozzle sizes (e.g., Z05 vs. Z08) using standard wrenches included in the tool kit. Always ensure the system is depressurized before opening the EC. Parallel flow is typically used in cell lysis, while reverse flow is typically used in emulsions.

• To replace the Plunger Seal watch this video - Replacing the plunger seal on the Mini DeBEE homogenizer
• To determine if the Plunger Seal need to be replaced follow these steps:

Preparation

• Flush the system thoroughly (CIP).
• Depressurize completely.
• Disconnect the Inlet Hose (Tri-Clamp) and the Outlet High-Pressure Tubing (Gland & Collar) from the cylinder head.

Remove the High-Pressure Cylinder

• Support the Cylinder: The stainless-steel cylinder is heavy. You may need a second person or a support block to hold it steady once unbolted.
• Loosen Mounting Bolts: Using the appropriate wrench, remove the 4 (or more) bolts securing the cylinder to the distance piece/hydraulic face.
• Extract the Cylinder:
  
  • Slowly pull the cylinder straight forward (away from the machine).
  • CRITICAL: Do not let the cylinder "hang" on the plunger. Keep it perfectly horizontal until it clears the plunger tip.
  • Tip: Rotating the cylinder slightly as you pull can help break the friction of the seal.

Inspect the Plunger (The Piston)

• The plunger will remain attached to the hydraulic drive, protruding out.
• Clean: Wipe the plunger with a soft, lint-free tissue.
• Fingernail Test: Run your fingernail along the length of the plunger (the working zone).
  
  • Fail: If your nail "clicks" or catches on a scratch, the plunger is scored. Replace immediately.
  • Pass: If it feels glassy smooth, the plunger is likely reusable.

Inspect the Seal

• The seal is located inside the bore of the High-Pressure Cylinder you removed.
• Extraction: Use a specialized seal removal tool or a plastic/brass pick. Never use a steel screwdriver or pick, as scratching the cylinder bore (stuffing box) will cause permanent leaks.
• Examine the Seal:
  
  • Ragged Edges: Indicates "extrusion" (seal blowing out the back). Check your Backup Ring.
  • Grooves: Vertical lines inside the seal indicate it was grinding against a damaged plunger.

Reassembly Tip

• Lubricate: Apply a generous amount of water or suitable lubricant (depending on process compatibility) to the plunger and the new seal.
• Alignment: When pushing the cylinder back on, you will feel resistance when the seal hits the plunger tip. Do not force it. Wiggle gently or rotate to help the seal "climb" onto the plunger without rolling.
• Torque: Tighten the mounting bolts in a "star" (crisscross) pattern to ensure the cylinder is aligned perfectly with the drive.

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• Check that the cooling water supply is turned on and flowing to the hydraulic heat exchanger.
• Check if the ambient room temperature is too high.
• Verify the hydraulic oil level is not low.

• Air Lock: The system is likely air-bound. Stop the unit, open the priming valve or loosen the outlet fitting slightly to bleed air while running at low pressure (priming mode).
• Inlet Blockage: Check the inlet filter or suction line for clogs.
• Stuck Check Valve: If the product is sticky, the inlet ball valve may be stuck in the closed position.

• This is often cavitation in the hydraulic pump or aeration in the product line.
• Check the hydraulic oil level immediately.
• Ensure your product feed is sufficient, and the pump isn't "starving" for material.

If a leak is detected, follow the "S.T.O.P." protocol:

• Stop the machine (hit the E-Stop if the leak is a high-pressure spray).
• Trace the fluid: Is it Product, Oil, or Water?
• Observe the source: Is it a Weep Hole (Seal failure) or a Fitting (Loose connection)?
• Proceed:
  
  • If Weep Hole: Replace Seal.
  • If Fitting: Depressurize & Tighten.

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This indicates a failure of the High-Pressure Plunger Seal.

• Diagnosis: The seal that wraps around the ceramic/steel plunger has worn out. Product is bypassing the seal and exiting via the safety weep holes.
• Action: Stop the unit immediately. Replace the Plunger Seal, Backup Ring, and inspect the Plunger for scoring.
  
  • Note: On the Mini DeBEE, check the "distance piece" or gap between the hydraulic cylinder and the high-pressure cylinder. If product is spraying here, it confirms a plunger seal failure.

This indicates a failure of an EC O-Rings or Face Seal.

• Diagnosis: Locate exactly which weep hole the fluid is coming from (see "Weep Hole Locations" diagram in the manual).
  
  • Leak at Cylinder Connection: Inlet Face Seal failure.
  • Leak at Nozzle Nut: Nozzle O-ring or Gasket failure.
  • Leak at Back Pressure Valve: Reactor seal failure.
• Action: Depressurize and replace the specific O-ring. Do not overtighten the nut to stop the leak; this will not work and may damage the threads.

The Inlet Connection Seal is compromised.

• Diagnosis: Often caused by vibration loosening the inlet hopper/feed line connection.
• Action: Tighten the sanitary clamp or fitting. If it persists, replace the gasket.

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