An O-ring is a circular sealing element used in HVAC systems, plumbing, and mechanical devices to prevent leaks between parts. Made from flexible materials like rubber or silicone, O-rings sit in a groove and compress during assembly to create a tight seal. They help maintain system efficiency, prevent damage, and reduce safety risks caused by leaks.
/ˈoʊ ˌrɪŋ/
An O-ring is a circular sealing element used in HVAC systems, plumbing, and mechanical devices to prevent leaks between parts. Made from flexible materials like rubber or silicone, O-rings sit in a groove and compress during assembly to create a tight seal. They help maintain system efficiency, prevent damage, and reduce safety risks caused by leaks.
What does an O-ring do?
It seals the gap between parts to prevent leaks of air, water, or refrigerant.
Source: The Cooling Company
Material, size, and lubrication affect sealing performance.
During AC maintenance, a technician replaces worn O-rings on refrigerant lines to restore airtight seals and prevent leaks.
Inspect O-rings regularly and replace them with the correct size and material. Use compatible lubrication to avoid damage during installation.
“Inspect O-rings regularly and replace them with the correct size and material. Use compatible lubrication to avoid damage during installation.”
The O-ring seal was first patented in 1937 and remains a staple in fluid systems.
How do I know if an O-ring needs replacing?
Signs include cracking, flattening, brittleness, or visible leaks at the joint.
Can I reuse an O-ring?
It is best to replace them, especially after disassembly or if they show wear.
Does size really matter?
Yes. Incorrect sizing can prevent proper sealing and cause leaks.
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