MATERIALS & HANDLING
RING OF LIGHT L
Sealryt looks at the crucial role that lantern rings play in the smooth running of rotating equipment
antern rings are essential to the successful operating of rotating equipment, since they are specifi cally designed to
deliver fl ush water to the shaft surface when used with mechanical packing.
TYPES OF LANTERN RINGS There are various diff erent types of lantern rings and they can be manufactured from materials such as steel, aluminum, brass, and Tefl on. Shaft sealing technology specialist
SealRyt, produces its own unique lantern rings, tailored to address specifi c challenges in the industry.
INNOVATIVE DESIGN SealRyt lantern rings SLR (Structural Lantern Rings) are distinct from the standard ones on the market since they were developed to ensure the delivery of water to the shaft as eff iciently as possible. The design not only achieves this
but also boasts a robust structure capable of withstanding higher pressures within the stuff ing box, this arises from the mechanical action of tightened packing. Additionally, the design mitigates
clogging issues - a common problem with conventional lantern rings where small ports and shallow channels on either the outer diameter (OD) or inner diameter (ID) often lead to blockages.
COMMON INSTALLATION ISSUES Despite their essential role, lantern rings can encounter issues owing to improper installation, including: Incorrect sizing: If the lantern ring is not correctly sized for the equipment, it will not function eff ectively. Poor confi guration matching: Installers must ensure the packing set confi guration matches the actual stuff ing box setup. Failing to do so can lead to poor performance.
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Standard PTFE versus an SLR
A glass and moly fi lled PTFE lantern ring
Pump packing utlising the SLR in a 2L3 confi guration
By way of illustration consider
a typical pump model number indicating a confi guration such as ‘2L3’. This means there are two rings of packing at the bottom, followed by the lantern ring (denoted by ’L’), and then three more rings extending to the atmosphere – they might be confi gured wrongly during the installation process.
THE IMPORTANCE OF PROPER PLACEMENT It’s important to carefully inspect the stuff ing box and take accurate measurements to ensure the correct placement of the product. Placing the lantern ring incorrectly can cause problems such as reduced performance and ineff ective sealing. Proper positioning is crucial to avoid these issues and maintain optimal function.
A SLR PRODUCT VIDEO LINK For more insight, a video at this following link
https://tinyurl.com/ zrnder9a explains various aspects of the product, their materials, and functions. Remember, correct placement of the ring inside the stuff ing box is crucial. The company has been sealing
shafts in all types of industries for over 20 years. Sealryt urges anyone who has any rotating shaft sealing questions or wants to learn more about pump seals, mechanical packing or failure points, or to contact a Sealryt engineer.
For more information visit:
www.sealryt.com
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