Key Benefits
By doing so, the lantern ring:
- Reduces Friction and Heat generated by the rotating shaft.
- Flushes Away Contaminants and Abrasive Particles before they can damage the packing or shaft surface.
- Maintains Proper Lubrication to extend the lifespan of packing rings.
- Protects Against Shaft Scoring or Corrosion by providing a fluid barrier.
- Helps Maintain Sealing Pressure and improves overall sealing performance.
Typical Installation
Lantern rings are generally positioned between the middle packing rings—for example, between the third and fourth ring—in a multi-ring packing arrangement. This strategic placement ensures that the flush fluid reaches the heart of the stuffing box where it’s needed most.
Common Applications
Lantern rings are widely used in:
- Centrifugal Pumps
- Slurry and Chemical Pumps
- Agitators and Mixers
- Valves and Other Rotary Equipment
- Water and Wastewater Treatment Systems
- Mining, Pulp & Paper, Power Generation, and Marine Industries
Material Options
Lantern rings are available in a range of materials to meet varying service conditions:
- Brass or Bronze: Common for general industrial and water service applications.
- Stainless Steel: High strength and corrosion resistance for aggressive or sanitary environments.
- PTFE (Teflon®): Excellent chemical resistance and non-stick properties.
- Glass-Filled Nylon or Other Thermoplastics: Lightweight, economical options for non-corrosive environments.
Benefits of Using Lantern Rings
- Protects shaft sleeves and packing from excessive wear
- Reduces maintenance frequency and downtime
- Enhances system cleanliness and reliability
- Easily integrated into existing packing arrangements
- Suitable for both new equipment and retrofits
