Value Collection TES70018 O-ring Dash 018 Ptfe Silicone

Product Description

The VALUE COLLECTION TES70018 is a Dash 018 O-ring designed for applications that demand both broad chemical resistance and reliable elastomeric recovery. The ring measures 0.75 inches inside diameter, 0.875 inches outside diameter, and 0.0625 inches thick with a round cross section. Construction uses a seamless PTFE-FEP encapsulation layer that fully encloses a silicone elastomer core. This design matches the chemical and temperature resistance of solid PTFE while retaining the flexibility and compression-set recovery of silicone. Hardness is rated at 70 Shore A. Licensed plumbers, pipefitters, HVAC technicians, and maintenance mechanics install this type of seal in fluid and gas handling systems where aggressive media or wide temperature swings would degrade standard nitrile or neoprene rings.

This O-ring suits residential and commercial installations wherever a chemically resistant, flexible face or radial seal is required. Typical use cases include chemical process lines, food-grade fluid systems, high-temperature steam or condensate connections, and HVAC refrigerant-adjacent fittings where PTFE-level chemical inertness is specified. The Dash 018 sizing is a standard AS568 designation, making the TES70018 a direct dimensional fit wherever that dash number is called out in a parts list or service manual.

Key Features

• Seamless PTFE-FEP encapsulation fully encloses the silicone core for uniform chemical resistance
• Operating temperature range of -75 degrees F to 400 degrees F suits cryogenic through high-heat service
• Round cross section provides predictable, uniform sealing load under compression
• 70 Shore A hardness rated Hard for positive sealing in standard groove geometries
• Dash 018 per AS568 standard sizing for straightforward replacement without measurement
• Combines PTFE chemical inertness with silicone elasticity and compression recovery

Compatibility

Designed as a standard Dash 018 AS568-dimension replacement O-ring for face-seal and radial-seal grooves specifying 0.75 inches ID, 0.875 inches OD, and 0.0625 inches cross-section thickness in PTFE-encapsulated silicone construction.

Installation Notes

Depressurize and isolate the line or fitting before removing the existing O-ring. Clean the groove of debris and inspect for wear or corrosion before seating the new ring. Avoid stretching the ring beyond its elastic limit during installation; use an appropriate O-ring installation tool for tight grooves. Verify groove dimensions match Dash 018 specifications before final assembly to ensure proper compression and sealing.