Value Collection ZMSCH3X30 O-ring 30x36x3 Inch Buna-n

Product Description

The VALUE COLLECTION ZMSCH3X30 is a large-diameter Buna-N (Nitrile Butadiene Rubber) O-ring designed for static and dynamic sealing applications where resistance to petroleum-based fluids is required. With a 30-inch inside diameter, 36-inch outside diameter, and 3-inch cross-section thickness, this round-profile ring seals reliably across a wide temperature range of -40 degrees F to 250 degrees F. The 70-durometer hardness provides a firm, resilient seal suitable for high-compression applications. Licensed trades including plumbers, pipefitters, and HVAC mechanics install this type of seal in large-bore valves, pumps, flanges, and fluid system assemblies.

This O-ring is suited for industrial and commercial fluid systems where petroleum product exposure is common. Typical applications include hydraulic systems, fuel handling equipment, large-bore pump housings, and industrial valve assemblies. Its Buna-N compound offers excellent compression set resistance along with strong tear and abrasion resistance, making it a dependable choice for demanding, high-cycle installations. Sold in a package of 50 units with a minimum order quantity of 1.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — the most widely used O-ring elastomer for petroleum product compatibility
• Operating temperature range: -40 degrees F to 250 degrees F
• 70-durometer hardness rating for firm compression set performance
• Round cross-section profile for consistent sealing contact
• Excellent resistance to tear and abrasion in high-cycle service
• Meets SAE and MIL-Spec standards

Compatibility

Compatible with petroleum products and petroleum-based fluids. Meets SAE and MIL-Spec standards. Not FDA approved. Should not be stored in direct sunlight or near motors or electrical equipment that generates ozone.

Installation Notes

Installation of large-bore O-rings of this size is typically performed by licensed plumbers, pipefitters, or industrial mechanics. Always depressurize and isolate the system before removing or replacing any sealing components. Inspect the mating groove and sealing surfaces for nicks, scoring, or contamination before seating the new ring. Avoid twisting or stretching the O-ring beyond its natural diameter during installation, and use a compatible lubricant approved for Buna-N elastomers and the system fluid.