Value Collection TES70218 O-ring Dash 218 Ptfe Silicone

Product Description

The VALUE COLLECTION TES70218 is a Dash 218 O-ring with a polytetrafluoroethylene (PTFE) FEP encapsulated silicone construction, designed for sealing applications that demand both broad chemical resistance and reliable elasticity. The ring measures 1.25 inches inside diameter, 1.5 inches outside diameter, and 0.125 inches thick with a round cross section. The seamless Teflon FEP encapsulation fully encloses a silicone elastomer core, combining the chemical and temperature resistance of solid PTFE with the compression recovery of silicone. It carries a hardness rating of 70 Shore and suits installations handled by licensed plumbers, HVAC technicians, and mechanical contractors.

This O-ring is suited for sealing flanges, fittings, valves, and fluid system connections where exposure to aggressive chemicals or wide temperature swings is a concern. The PTFE encapsulated design performs across a working temperature range of -75 degrees F to 400 degrees F, making it appropriate for both hot-fluid plumbing systems and HVAC refrigerant-side applications where chemical compatibility is a priority. It is sold individually and is used in residential and light commercial mechanical systems.

Key Features

• Seamless Teflon FEP encapsulation completely encloses the silicone elastomer core for uniform chemical resistance
• Matches chemical and temperature resistance of solid PTFE O-rings while retaining elastomer recovery properties
• Wide service temperature range: -75 degrees F to 400 degrees F
• Round cross section with consistent 0.125 inches thickness for reliable compression sealing
• Hardness rating of 70 Shore for firm, durable sealing under pressure
• Dash 218 standard sizing for straightforward cross-reference and replacement

Compatibility

Designed as an OEM-style replacement or serviceable seal for fluid system components requiring a Dash 218 PTFE-encapsulated silicone O-ring, including valves, fittings, and flanged connections in plumbing and HVAC applications.

Installation Notes

Installation is typically performed by licensed plumbers or HVAC technicians during valve service, flange assembly, or fitting replacement. Shut off and depressurize the system completely before removing the existing seal. Inspect the groove and mating surfaces for nicks or corrosion that could compromise the new seal. Do not stretch or nick the encapsulation during installation, as damage to the PTFE layer reduces chemical resistance.