O protetor de mancal (also known internationally as a "bearing isolator") is an industrial sealing device designed to protect bearings and lubricant inside a bearing housing against external contamination and leaks. These use a contactless technology, that is, they create a labyrinth path that physically blocks the entry of dust, water, or chemicals while retaining oil or grease inside the equipment.
The MBG harmonizes a stationary and a rotating part into a unified body, creating an impassable barrier against external contamination while ensuring that every drop of lubricant returns to its place of origin. Thus, while the lubricant is kept exactly where it should be, external threats are blocked by the precision of our design.
The efficiency of machinery and equipment depends directly on the integrity of the bearings. Our protectors form an insurmountable barrier against dust, moisture, and external contaminants, while ensuring the lubricant remains exactly where it should be.
Direct results for your plant:
The ultimate solution for high performance. Through a complex architecture of grooves and precision chambers, the MBG model utilizes a contactless labyrinth seal system, eliminating friction.
Standard Material: Bronze;
Highlight: Harmonizes stationary and rotating parts in a unified body;
Performance: Operates at temperatures from -20°C to +200°C with maximum speed of 3,500 m/min.
Developed for total tightness (Leak-Proof) in critical environments.
Magnetic Model: Lapped flat faces that guarantee absolute seal in static or dynamic regimes.
STS Model: Ideal for the Food Industry (washdown protocols), resisting constant cleaning procedures without compromising the lubricant.
Innovation aimed at equipment with axial misalignment. The sliding rotor absorbs internal movements, eliminating friction wear on the shaft.
Differentiator: Double drive system for superior fixation (grip), mitigating slippage risks.
The pinnacle of sealing technology for the Pulp & Paper, Petrochemical, and Chemical sectors.
Technology: PTFE reinforced with Molybdenum (self-lubricating);
Resistance: Withstands severe chemical attacks and temperatures from -40°C to +121°C;
Advantage: Virtually zero torque and non-abrasive design that preserves the shaft against grooves.
With over 25 years of expertise, Granpac combines tradition with constant innovation. Our differentials reflect our commitment to technical excellence and compliance:
| Characteristics | STANDARD BEARING | PB MODEL | LS MODEL | LN MODEL |
|---|---|---|---|---|
| Primary Application | General / Food Grade | Axial Misalignment | High Speed | Extreme Chemical |
| Base Material | Bronze | High Strength Bronze | PTFE + Molybdenum | Specialized PTFE |
| Temperature Range | Industrial Standard | 20°C to +80°C | -40°C to +121°C | -40°C to +121°C |
| Maximum Speed | Standard | High Reliability | 3,500 m/min | 3,500 m/min |
| Technical Edge | Dual Sealing | Sliding Rotor | Virtual Zero Torque | Chemical Resistance |
| Asset Protection | Wear-free | Isolates Axial Movement | Groove-Free Shaft | Physical Stability |
| Focus Industry | Food / Pumps | Motors / Gearboxes | Petrochemical | Pulp & Paper |
