Mi-T-M BACK-UP RING 18MM Part 25-0708

Description

Mi-T-M BACK-UP RING 18MM Part 25-0708

Protect your primary seals from extreme pressure blowouts and extend the life of your pump with a genuine OEM Mi-T-M replacement back-up ring. In high-PSI commercial pressure washers, rubber O-rings and primary water seals are subjected to immense dynamic force. Without proper support, these soft seals will quickly deform and extrude into the microscopic clearance gaps of your pump manifold, leading to sudden and complete pressure loss. Genuine Mi-T-M OEM back-up rings provide a rigid, precision-engineered barrier that holds your primary seals firmly in place, ensuring your equipment can handle its maximum rated pressure without failure.

Key Features & Benefits

• Anti-Extrusion Protection: Acts as a vital, structural reinforcement behind softer O-rings and V-packings, preventing them from being forced out of their grooves under extreme PSI.
• Exact-Fit Engineering: Machined to exact factory dimensions. A back-up ring is only effective if it perfectly fills the clearance gap; settling for off-brand parts risks catastrophic seal failure and metal-on-metal wear.
• Extreme-Duty Materials: Constructed from rigid, friction-resistant materials like Teflon (PTFE) or hard, chemical-resistant polymers designed to withstand harsh detergents and intense heat.
• Maximized Seal Life: By preventing microscopic flexing and extrusion, these rings drastically reduce the friction and tearing that destroy primary seals, keeping your pump in the field longer between rebuilds.

Common Applications

Back-up rings are critical structural components found deep inside high-pressure fluid systems. This OEM part is typically utilized in:

• High-Pressure Pump Manifolds: Supporting the water seals (V-packings) around the ceramic plungers.
• Unloader Valves: Protecting the internal stem O-rings that regulate your machine’s pressure spikes.
• Chemical Injectors: Reinforcing the seals that manage acidic or caustic cleaning agents.

Compatibility

Genuine Mi-T-M back-up rings are available as direct replacements for the internal components of Mi-T-M brand pumps, as well as the factory-specified AR (Annovi Reverberi) and General Pumps used across the Mi-T-M pressure washer lineup.

Warning: Back-up rings are precision-machined down to the fraction of a millimeter and vary wildly based on the exact pump model. You must strictly cross-reference your specific pump model number with your Mi-T-M parts breakdown before ordering to ensure correct fitment.

Back-up rings are strictly directional! You must always install the back-up ring on the low-pressure side of the O-ring or packing it is supporting. If you install it on the high-pressure side, the primary seal will simply blow past it, rendering the back-up ring completely useless and instantly causing a leak. Always refer to your pump’s exploded parts diagram for proper orientation during a rebuild.