Product ID: 10187250 – SST Backup Ring / High-Pressure Seal Gasket

Description:
This component is a stainless steel (SST) backup ring, also known as a high-pressure seal gasket or metal sealing ring, designed for waterjet cutting systems . It is a precision-machined metal ring that serves as an anti-extrusion support component within high-pressure sealing assemblies. The backup ring is installed adjacent to an O-ring or elastomeric seal to prevent seal extrusion into clearance gaps under ultra-high pressure conditions .

This component is manufactured by AccuStream (KMT Waterjet Systems) under OEM part number 10187250 and is cross-referenced as production number 1-12733 . It is rated for maximum working pressure of 4,100 bar (approximately 60,000 PSI) and is constructed from corrosion-resistant stainless steel .

Applications:

• Used as a backup ring within high-pressure sealing assemblies in waterjet intensifier pumps and pneumatic on/off valves 

• Installed adjacent to O-rings in the sealing head assembly, high-pressure cylinder, check valve assemblies, and dump valve components

• Suitable for ultra-high pressure waterjet systems operating at 60,000 PSI (approximately 4,100 bar) 

• Compatible with KMT, AccuStream, SL-VI series pumps, and other standard waterjet intensifier systems 

Features:

• Stainless Steel Construction: Manufactured from SST material offering excellent corrosion resistance, high strength, and durability in harsh waterjet environments 

• 4,100 Bar Pressure Rating: Engineered for continuous operation at 60,000 PSI without deformation or extrusion failure 

• Precision-Machined: Produced with high dimensional accuracy using CNC machining and three-dimensional measurement inspection 

• Anti-Extrusion Function: Functions as a rigid barrier, preventing the softer O-ring material from being forced into clearance gaps under ultra-high pressure

• High Fatigue Resistance: Manufactured with advanced heat treatment processes (solution double-aging) and high-pressure bore mirror finishing to increase metal fatigue resistance 

• Corrosion and Wear Protection: Surface treatment provides enhanced durability and extended service life in waterjet operating environments

• OEM Compatibility: Direct replacement part for KMT AccuStream systems

Maintenance:

• Critical Wear Component: The backup ring is a consumable part that should be replaced whenever the associated O-ring or primary seal is replaced. Do not reuse a backup ring that shows signs of permanent compression set, splitting, deformation, or edge damage

• Inspection: During seal replacement or pump overhaul, inspect the backup ring for signs of cracking, wear, extrusion damage, or loss of dimensional integrity. Even minor damage warrants replacement

• Orientation: When installing, place the backup ring on the low-pressure side of the O-ring or primary seal unless specified otherwise in the equipment service manual

• Groove Inspection: Before installing a new backup ring, ensure the corresponding internal groove in the cylinder bore or sealing head is clean, smooth, and free from burrs, nicks, or damage that could compromise the seal

• Surface Preparation: Clean all sealing surfaces thoroughly with a soft cloth and low-pressure water. Remove all debris, old seal residue, and mineral deposits. Do not use abrasive tools that could scratch sealing surfaces

• Lubrication: Apply manufacturer-recommended high-pressure grease to the backup ring and O-ring during installation to prevent pinching, rolling, or damage during assembly

• Full Depressurization: Always fully depressurize both the hydraulic system and the high-pressure water system before disassembling any component containing backup rings. Follow lockout/tagout procedures

• Do Not Use Alone: Never install a backup ring without its corresponding O-ring or primary seal, as the backup ring alone does not provide sealing function

• Storage: Store spare backup rings in a clean, dry environment away from direct sunlight, ozone, or harsh chemicals to prevent material degradation

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