Product Name: Snap Ring / Retaining Ring (Part No. S24B20/103 / 4101571)

Description:
This component is a snap ring (also known as a retaining ring or circlip) specifically designed for BFT waterjet intensifier pumps . It is a precision-engineered circular fastener manufactured from spring-tempered steel, featuring an open-end design with lug holes that allow for compression during installation into a precision-machined internal groove .

According to BFT waterjet parts documentation, this snap ring is listed as Item 22 in the CP022001/2 intensifier assembly parts diagram . Its primary function is to provide reliable axial retention, securing critical internal components such as seal heads, bushings, displacement sensor pistons, and initiators in their proper axial position within the high-pressure cylinder or intensifier assembly . It prevents component displacement or movement during high-pressure operation up to 60,000–94,000 PSI (approximately 4,137–6,480 bar).

Within the BFT intensifier assembly, this snap ring works in conjunction with other components including the initiator (XN5/220) and plug (XST9/220) to maintain proper positioning and alignment of the intensifier's displacement sensor and hydraulic components .

Applications:

• Retains internal components (seals, spacers, bushings, displacement sensor piston) within the high-pressure cylinder or intensifier assembly of BFT waterjet pumps

• Provides axial positioning and prevents component movement under high-pressure cycling

• Specifically used with initiator (XN5/220) in CP022001/2 intensifier assembly

• Used during scheduled preventive maintenance, major pump overhauls, or when component retention is compromised

• Compatible with BFT intensifier assemblies CP022001/2 and HT022012/172

Features:

• Spring-Tempered Steel Construction: Provides high tensile strength, fatigue resistance, and durability under cyclic loading

• Open-End Configuration: Features lug holes for installation using standard snap ring pliers 

• Precision Dimensions: Manufactured to exact tolerances for consistent fit within standard groove specifications

• Axial Retention: Provides reliable mechanical retention without requiring additional fasteners or threading

• Corrosion-Resistant Finish: Surface treatment for extended service life in wet operating environments

• Direct OEM Replacement: Listed as Item 22 in BFT intensifier CP022001/2 parts list; cross-referenced with part number 4101571 and S24B20/103 

Maintenance:

Failure Diagnosis (When to Inspect/Replace):

• Component Movement: If internal parts shift or become misaligned, the snap ring may have lost its retaining force

• External Leakage: Water or hydraulic oil weeping from the cylinder area may indicate snap ring failure allowing seal movement

• Visible Damage During Inspection: Inspect the snap ring for signs of deformation, cracking, corrosion, or loss of spring tension

• Noise or Vibration: Unusual sounds during pump operation may indicate loose internal components due to snap ring failure

• Scheduled Overhaul: Standard practice to inspect snap rings during major pump overhauls and replace them if any wear or damage is detected

Inspection and Replacement Guidelines:

• Use Proper Tooling: Always use the correct size and type of snap ring pliers (internal retaining ring pliers) to avoid distorting the ring during removal or installation . If pliers are unavailable, a small flathead screwdriver can be used with extreme caution, inserting it into the opening and applying gentle pressure to expand the ring 

• Groove Inspection: Before installing a new snap ring, inspect the corresponding internal groove for wear, burrs, or damage that could affect proper seating

• Full Seating Check: During installation, ensure the snap ring is fully and evenly seated in its groove. Partial seating may cause component failure under pressure

• Replacement Criteria: Replace the snap ring immediately if cracks, deformation, corrosion, or loss of spring tension is observed. Do not reuse a damaged snap ring

• Full Depressurization: Always fully depressurize the waterjet system (high-pressure water, hydraulic system, and air supply) and follow lockout/tagout procedures before removing or servicing components secured by this snap ring

• Do Not Over-Expand: Avoid stretching the snap ring beyond its designed working range, as over-expansion can cause loss of retaining force or permanent deformation

• Replace as a Set: When servicing the intensifier assembly, inspect and potentially replace related components such as initiator (XN5/220), plug (XST9/220), and other sealing elements 

• Take Precautions: Be careful not to scratch the shaft or housing surface when removing the snap ring, as damage could compromise sealing 

Cross-Reference Information:

• BFT #: S24B20/103 

• Alternative #: 4101571

• Also known as: Snap Ring, Retaining Ring, Circlip

• Item 22 in Intensifier Assembly CP022001/2 

• Item 22 in Intensifier Assembly HT022012/172

• Works with: Initiator (XN5/220), Plug (XST9/220), High Pressure Cylinder (CP022009/779) 

• Rated Pressure: 60,000–94,000 PSI (4,137–6,480 bar)