Waterjet-cutters-CP022015-527.1558.1

Short Description:

Used for BFT/BHDT pump.
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Details

Product Name: Back-up Ring / Support Ring (Part No. CP022015/527)

Description:
This component is a Back Ring (also referred to as a back-up ring or support ring) specifically designed for the CP022001/2 series BFT waterjet intensifier pump . It is a precision rigid ring manufactured from a durable polymer or metal material.

In high-pressure waterjet systems, the back-up ring is a critical sealing support component. It is installed adjacent to an O-ring or other elastomeric seal within a seal groove . Its primary function is to prevent extrusion; under extreme pressure (up to 60,000-94,000 PSI / 4,137-6,480 bar), the rigid back-up ring fills the clearance gap between the softer primary seal and the metal gland wall . This action prevents the primary seal from being forced into the gap, which would otherwise cause rapid seal failure, high-pressure water leaks, and a drop in cutting pressure.

This component is listed as Item 8 in the CP022001/2 intensifier parts diagram .

Applications:

Provides anti-extrusion support for O-rings in the high-pressure seal stack of BFT waterjet intensifier pumps.
Installed within the high-pressure cylinder assembly to ensure proper sealing and prevent water leakage.
Used during scheduled preventive maintenance, major pump overhauls, or when external water leakage is detected.
Suitable for ultra-high pressure waterjet systems operating at 60,000-94,000 PSI.

Features:

Rigid Construction: Made from hard, non-deformable material to withstand extrusion forces under extreme pressure.
Anti-Extrusion Function: Fills the extrusion gap, preventing the softer primary seal from being forced into the gap.
Critical Consumable Component: Designed for periodic replacement; a worn or missing back-up ring leads to immediate seal failure.
Precision Dimensions: Manufactured to exact tolerances for a perfect fit within the designated seal groove.
Direct OEM Replacement: Listed as Item 8 in BFT intensifier CP022001/2 parts list .

Maintenance:

Failure Diagnosis (When to Replace):

External Water Leakage: Visible water weeping from the high-pressure cylinder area or weep hole indicates seal stack failure, requiring back-up ring replacement .
Pressure Drop: Inability to maintain rated cutting pressure suggests internal seal failure, often involving extrusion damage.
Visible Damage During Disassembly: When the pump is opened for maintenance, inspect the back-up ring for signs of deformation, cracking, splitting, flattening, or wear. Any visible damage warrants immediate replacement.
Scheduled Preventive Maintenance: Standard practice to replace the back-up ring together with the O-ring during any scheduled pump maintenance or major overhaul .

Inspection and Replacement Guidelines:

Always Replace with O-Rings: This is a single-use consumable component. Always replace it with a new one whenever the adjacent O-ring is replaced .
Full Depressurization (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, bleed down all high-pressure lines, and follow lockout/tagout procedures.
Clean Installation: Perform the rebuild in a designated clean area. Thoroughly clean the seal groove and all mating surfaces with a soft, lint-free cloth, removing all debris, old seal residue, and mineral deposits.
Groove Inspection: Inspect the seal groove for nicks, burrs, sharp edges, or damage that could compromise the seal stack.
Lubrication: Apply a thin, uniform layer of manufacturer-recommended high-pressure grease to the back-up ring and O-ring during installation to prevent pinching, rolling, or tearing during assembly.
Cross-Reference Information: This back-up ring is also known as CP022015/527 and is associated with BFT part numbers .
Purchase Together (Recommended): Due to the high technical requirements of end sealing, it is recommended to purchase the high-pressure water seal components (O-ring and back-up ring) together to ensure proper installation and fit .