Value Collection ZMSCH70225 O-ring Dash 225 Nbr 50 Pack

Product Description

The VALUE COLLECTION ZMSCH70225 is a Dash 225 O-ring made from Nitrile Butadiene Rubber (NBR), also known as Buna-N, for use in fluid and pneumatic sealing applications across HVAC, plumbing, hydraulic, and general mechanical systems. It measures 1.875 inches inside diameter, 2.125 inches outside diameter, and 0.125 inches thick, with a round cross section. Rated at 70 Shore A hardness, this O-ring delivers strong compression set resistance, tear resistance, and abrasion resistance. It is sold in a package quantity of 50, making it practical for service technicians who replace multiple seals in a single job.

This O-ring is suited for applications involving petroleum-based fluids, hydraulic oils, and similar media. It performs across a temperature range of -40 degrees F to 250 degrees F, making it appropriate for both refrigeration-adjacent and higher-temperature mechanical systems. Common install scenarios include pump seals, valve bodies, fittings, and hydraulic couplings in residential and light commercial equipment. Licensed HVAC technicians, plumbers, and industrial mechanics will encounter this size regularly in service work on fluid-handling components.

Key Features

• Buna-N (NBR) elastomer provides excellent resistance to petroleum products and hydraulic fluids
• 1.875 inches ID x 2.125 inches OD x 0.125 inches thick, Dash 225 standard sizing
• 70 Shore A hardness rating for reliable compression set and sealing performance
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross section for consistent seating in standard O-ring grooves
• Meets SAE and MIL-Spec standards; package quantity of 50 per order

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Conforms to SAE and MIL-Spec standards for Dash 225 O-rings. Not FDA approved; not recommended for food-contact or ozone-heavy environments. Store away from direct sunlight, motors, and electrical equipment that may generate ozone.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or hydraulic system mechanics during equipment service or component replacement. Always depressurize and de-energize the system before removing or installing O-rings. Inspect the mating groove for nicks, burrs, or contamination before seating the new ring. Avoid overstretching during installation; use a compatible lubricant appropriate to the fluid media in the system.