Value Collection ZMSCH90447 O-ring Dash 447 Nitrile 90 Duro

Product Description

The VALUE COLLECTION ZMSCH90447 is a Dash 447 Buna-N (Nitrile Butadiene Rubber) O-ring designed for static and dynamic sealing applications in fluid and pneumatic systems. It measures 9 inches inside diameter by 9-1/2 inches outside diameter with a 1/4 inch cross-section thickness. Hardness is rated at 90 Shore A durometer, placing it in the extra-hard category for applications requiring minimal compression deflection. The temperature range spans -40 degrees F to 250 degrees F, making it suitable for a wide range of operating environments. Sold in packages of 5 per unit.

Buna-N O-rings at this size and durometer rating are commonly installed in large-bore hydraulic cylinders, industrial pump housings, compressor end caps, valve bonnets, and similar assemblies found in commercial HVAC, refrigeration, plumbing, and industrial fluid-handling systems. The 90 durometer hardness is well suited for high-pressure applications where extrusion resistance is a priority. Petroleum-based fluids are the primary compatible media, including mineral oils, hydraulic fluids, and fuels.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction — the most widely used O-ring elastomer for petroleum-product compatibility
• 90 Shore A durometer rating provides extra-hard compression set and extrusion resistance in high-pressure seating
• Operating range of -40 degrees F to 250 degrees F suits a broad range of commercial and industrial service conditions
• Excellent tear and abrasion resistance for dynamic sealing applications subject to movement or vibration
• Meets SAE and MIL-Spec standards for dimensional and material compliance
• Package quantity of 5 units per order supports service stock and repeat installations

Compatibility

Compatible with petroleum products including mineral oils, hydraulic fluids, and fuel media. Designed to meet SAE and MIL-Spec dimensional standards for Dash 447 O-rings. Not FDA approved — not intended for food, beverage, or pharmaceutical contact applications. Should not be stored in direct sunlight or near motors or electrical equipment that may generate ozone.

Installation Notes

O-ring installation should be performed by a qualified mechanic, plumber, or fluid-systems technician. De-energize and depressurize the system fully before breaking any seal or fitting. Inspect the gland and mating surfaces for scoring or corrosion prior to installation, and lightly lubricate the O-ring with a compatible fluid to prevent rolling or twisting during assembly. Avoid using sharp tools that may nick or cut the elastomer during seating.