Value Collection ZMSCV70243 Viton O-ring Dash 243

Product Description

The VALUE COLLECTION ZMSCV70243 is a Dash 243 Viton (fluoroelastomer) O-ring designed for static and dynamic sealing applications in HVAC, plumbing, refrigeration, and industrial fluid systems. It measures 4.125 inches inside diameter, 4.375 inches outside diameter, and 0.125 inches thick with a round cross section. The fluoroelastomer compound delivers high-temperature resistance up to 400 degrees F, a low compression set, and broad chemical compatibility. These properties make it a reliable choice for sealing against petroleum-based fluids, hydraulic media, and similar aggressive substances. Hardness is rated at 70 Shore A. Sold in a package of 5 rings.

This O-ring suits residential and commercial applications where elevated operating temperatures or petroleum product exposure would degrade standard nitrile or EPDM seals. Typical installation scenarios include pump housings, valve bodies, compressor service ports, refrigerant-side fittings, and hydraulic cylinder end caps. The Dash 243 designation is a standard AS568 size, making this ring a direct dimensional match for any groove machined to that specification. Plumbers, HVAC technicians, and industrial maintenance mechanics are the primary installers.

Key Features

• Fluoroelastomer (Viton-type) compound rated from -15 degrees F to 400 degrees F
• Good resistance to petroleum products, fuels, and hydraulic fluids
• Low compression set for long-term sealing integrity under sustained load
• Suitable for vacuum service and exhibits low gas permeability
• Round cross section, 70 Shore A hardness for a firm, reliable seal
• Standard AS568 Dash 243 dimensions for direct groove-to-spec fitment

Compatibility

Designed as a direct dimensional replacement for any AS568 Dash 243 groove application. Compatible with petroleum products and a wide spectrum of chemical media. Not FDA approved; not intended for food-contact or potable-water service.

Installation Notes

Depressurize and isolate the system before removing the old O-ring. Inspect the groove for nicks, burrs, or corrosion that could damage the new seal. Apply a thin film of compatible grease or system fluid to the O-ring before seating to ease installation and prevent initial dry-running damage. Verify groove dimensions match the Dash 243 specification before torquing the mating hardware to the system manufacturer's specified value.