Value Collection ZMSCS70330 Silicone O-ring Dash 330 10-pack

Product Description

The VALUE COLLECTION ZMSCS70330 is a round cross-section silicone O-ring supplied in a pack of 10. It measures 2.125 inches inside diameter, 2.5 inches outside diameter, and 0.1875 inches (3/16 inches) thick, conforming to Dash 330 sizing. With a hardness rating of 70 Shore A, this O-ring is suited for static and dynamic sealing applications that demand reliable performance across a wide temperature range. Silicone construction provides good dry heat resistance and strong weather and ozone resistance. Licensed HVAC technicians, plumbers, and maintenance professionals commonly specify this material when sealing joints exposed to heat cycling or outdoor environments.

This O-ring is appropriate for residential and light commercial applications involving oils, chemicals, and solvents where silicone compatibility has been confirmed. It is recommended for systems requiring service across an extended temperature range, from -80 degrees F to 450 degrees F. Typical install scenarios include shaft seals, pipe connections, valve bodies, and equipment housings. Note that this silicone formulation offers limited oil resistance, so verify fluid compatibility before specifying it in high-oil-concentration environments.

Key Features

• Dash 330 standard sizing: 2.125 inches ID, 2.5 inches OD, 0.1875 inches thick
• Silicone material rated for -80 degrees F to 450 degrees F continuous service
• 70 Shore A hardness for firm, consistent sealing compression
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents (limited oil resistance — verify application)
• Sold in a 10-piece pack with a minimum order quantity of 1 pack

Compatibility

Designed as a standard Dash 330 replacement O-ring for any gland or groove machined to accommodate a 2.125-inch ID silicone O-ring per AS568 sizing conventions.

Installation Notes

Installation should be performed by a qualified technician familiar with the sealing system being serviced. Power down or depressurize the system completely before replacing any O-ring. Inspect the gland groove for nicks, corrosion, or debris before seating the new ring. Avoid twisting the O-ring during installation, as torsional stress reduces service life.