Value Collection ZMSCS70157 Silicone O-ring Dash 157

Product Description

The VALUE COLLECTION ZMSCS70157 is a silicone O-ring with a round cross section, sized to Dash 157 specifications. It measures 4.5 inches inside diameter, 4.688 inches outside diameter, and 0.094 inches thick. With a durometer hardness rating of 70 (Hard), this O-ring is engineered for static and dynamic sealing applications that demand reliable performance across a wide temperature range. Silicone compound provides good dry heat resistance and strong resistance to weathering and ozone exposure. Sold in a pack of 10 units. Licensed trades and MRO technicians working with fluid and gas systems will find this a practical stocking item.

This O-ring is suited for use in HVAC, plumbing, pool and spa, and general industrial sealing applications where exposure to oils, chemicals, and solvents may occur at moderate levels. The silicone material performs reliably from -80 degrees F to 450 degrees F, making it a practical choice for systems that cycle through extreme temperature swings or require long-term dry heat resistance. It is not FDA approved and should not be used in food-contact or potable-water applications where FDA compliance is required.

Key Features

• Silicone compound rated from -80 degrees F to 450 degrees F continuous service temperature
• Round cross section with 0.094-inch thickness for consistent groove fit
• Durometer hardness of 70 (Hard) for stable compression under load
• Good resistance to weathering, ozone, and dry heat
• Limited compatibility with oils, chemicals, and solvents — verify media compatibility before use
• Sold in a pack of 10 for convenient stocking

Compatibility

Designed as a Dash 157 standard O-ring replacement for static or dynamic seal grooves requiring a 4.5-inch inside diameter and 0.094-inch cross-section thickness in HVAC, plumbing, pool, and general industrial equipment.

Installation Notes

Installation should be performed by a qualified technician familiar with sealing system requirements. Always depressurize and de-energize the system before removing or replacing O-rings. Inspect the groove for damage, debris, or corrosion before seating the new ring. Verify that the silicone compound is chemically compatible with the process media before installation — silicone has limited resistance to petroleum-based oils and should not be used where prolonged oil immersion is expected.