10188233-Backup-Ring-Brass.308.3-1
Product Name: Brass Backup Ring (Part No. 10188233)
Description:
This component is a brass backup ring specifically designed for the pneumatic on/off valve assembly in high-pressure waterjet cutting systems . It is a precision-machined rigid ring installed adjacent to the seal assembly (20428052) within the valve body (10189181), positioned between the HP Gland (BV701184) and the dynamic seal .
The primary function of this backup ring is to provide critical anti-extrusion support to the elastomeric high-pressure seal. Under ultra-high pressure operation (60,000–90,000 PSI / 4,137–6,200 bar), the rigid brass ring fills the extrusion gap between the softer seal material and the gland wall, preventing the seal from being forced into the clearance gap, which would otherwise cause rapid seal failure and high-pressure water leakage .
Manufactured from brass, this component offers excellent corrosion resistance, anti-galling properties, and dimensional stability in waterjet environments . It is a standard consumable part in pneumatic on/off valve assemblies for KMT, AccuStream, Flow, OMAX, H2O Jet, WSI, BFT, and Techni waterjet systems . Cross-reference part numbers include 1-11104, WK000174, 0560996121, and 0560996123 .
In the pneumatic control valve assembly, the brass backup ring (Item 4) works in conjunction with the following components :
10177855 – Pneumatic Actuator Assembly, NC
10189181 – Valve Body
BV701184 – HP Gland
20428052 – Seal Assembly
20435636 – Valve Stem
10178697 – Valve Seat
Applications:
Provides anti-extrusion support for the high-pressure seal in pneumatic on/off valve (water switch) assemblies of waterjet cutting systems
Installed between the HP Gland and the seal assembly within the valve body
Suitable for ultra-high pressure waterjet systems operating at 60,000–90,000 PSI (4,137–6,200 bar)
Compatible with KMT, AccuStream, Flow, OMAX, WSI, BFT, H2O Jet, and Techni waterjet systems
Used during scheduled preventive maintenance or when valve leakage is detected
Included in bleed down maintenance kits (e.g., 05116017) for MotoJet pumps
Features:
Brass Construction: Provides excellent corrosion resistance, anti-galling properties, and dimensional stability in high-moisture waterjet environments
Anti-Extrusion Function: The rigid brass material provides a non-deformable barrier that prevents the elastomeric seal from being forced into clearance gaps under extreme pressure
Precision-Machined: Manufactured to exact OEM tolerances for a perfect fit within the designated valve groove
Critical Consumable Component: Designed for single-use application and periodic replacement during valve service
Kit Integration: Standard component in pneumatic valve repair kits and bleed down maintenance kits
Dimensional Compatibility: Engineered to work with 1/4" HP seal assemblies
Maintenance:
When to Replace (Failure Diagnosis):
External Water Leakage: Visible high-pressure water weeping from the valve body indicates seal failure, and the brass backup ring must be replaced together with the primary seal
Valve Seal Service: Always replace the brass backup ring whenever the adjacent seal assembly (20428052) is replaced. Do not reuse old rings
Preventive Maintenance: Replace as part of scheduled valve overhaul during pump maintenance intervals (typically every 500-1,000 operating hours)
Visible Damage During Inspection: Inspect the ring for deformation, cracking, flattening, galling, or wear. Replace immediately if any damage is visible
Inspection and Replacement Guidelines:
Replace as a Set: When replacing the seal assembly (20428052), always replace the brass backup ring simultaneously. The backup ring alone does not provide sealing function
Orientation: Install the backup ring on the low-pressure side of the seal assembly, adjacent to the HP Gland, as shown in the equipment service manual
Clean Installation: Thoroughly clean the valve body groove and sealing surfaces before installing new components. Remove all debris, old seal residue, and mineral deposits
Lubrication: Apply a thin, uniform layer of manufacturer-recommended high-pressure grease to the backup ring and seal assembly during installation to prevent pinching, rolling, or damage during assembly
Full Depressurization (Critical): Always fully depressurize the waterjet system (high-pressure water, hydraulic system, and air supply) and follow lockout/tagout procedures before disassembling the pneumatic valve assembly
Torque Compliance: When reinstalling, tighten the HP Gland (BV701184) to the specific torque value listed in the equipment service manual to ensure proper compression of the seal stack
Kit Replacement: This brass backup ring is commonly available as part of complete on/off valve repair kits (e.g., 05116025, 05116017), which include the seal assembly, backup ring, valve stem, and other required components for a complete valve overhaul
Cross-Reference Information:
H2O Jet #: 10188233
Also known as Back-Up Ring, 1/4" Seal
