Value Collection ZMSCH3X36 O-ring 36in Id Nitrile

Product Description

The VALUE COLLECTION ZMSCH3X36 is a large-diameter Buna-N (nitrile butadiene rubber) O-ring designed for static and dynamic sealing applications across industrial, mechanical, and fluid-handling systems. With a 36-inch inside diameter, 42-inch outside diameter, and 3-inch thickness, this round-cross-section seal is built for heavy-duty installations where reliable compression set and fluid containment are critical. The 70-durometer hardness rating provides a firm, stable seal suitable for high-demand service environments. Rated for temperatures from -40 degrees F to 250 degrees F, it covers a wide service range for both cold and moderately elevated heat conditions.

This O-ring is suited for residential, commercial, and light industrial applications involving petroleum-based fluids, hydraulic systems, fuel handling, and pneumatic equipment. Its large format makes it a common choice for tank lids, large-bore flanges, pump housings, and custom gasket applications where standard off-the-shelf sizes fall short. HVAC technicians, plumbers, pipefitters, and industrial maintenance professionals are the primary installers. It meets SAE and MIL-Spec standards, making it appropriate for regulated and specification-driven work.

Key Features

• Buna-N elastomer — the most widely used O-ring material, with excellent resistance to petroleum products
• 70-durometer hardness for firm compression and reliable sealing under pressure
• Operating temperature range: -40 degrees F to 250 degrees F
• Excellent compression set, tear resistance, and abrasion resistance
• Round cross-section profile for consistent groove seating
• Meets SAE and MIL-Spec standards

Compatibility

Compatible with petroleum products and petroleum-based fluids. Not FDA approved; not suitable for food-contact or potable-water applications without independent verification. Designed as a standard Buna-N O-ring for large-bore sealing applications where a 36-inch ID, 42-inch OD, 3-inch thick round-cross-section seal is specified.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or industrial maintenance technicians depending on the system type. Before servicing, shut down the system, relieve all pressure, and drain or isolate the fluid being sealed. Ensure the mating groove is clean, dry, and free of burrs or debris before seating the O-ring. Do not store this O-ring in direct sunlight or near motors, generators, or other electrical equipment that may generate ozone, as ozone exposure degrades nitrile rubber over time.