PRESSURE-CARTRIDGE-1215869-1215870.2165.3-1

Short Description:

Used for BFT/BHDT pump.
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Details

Product Name: Pressure Cartridge / Hydraulic Seal Cartridge (Part Nos. 1215869 / 1215870)

Description:
This component is a pressure cartridge, also known as a hydraulic seal cartridge or seal carrier assembly, designed for the hydraulic (low-pressure) side of high-pressure waterjet intensifier pumps . It is a pre-assembled unit that contains precision dynamic seals, O-rings, and backup rings configured specifically for the hydraulic section of the intensifier pump .

The pressure cartridge serves as a critical sealing interface between the hydraulic piston and the cylinder bore, preventing hydraulic oil leakage and maintaining pressure integrity under high-cycle operation . The two part numbers (1215869 and 1215870) likely represent the left and right cartridges for opposite sides of the intensifier, or different pressure ratings (e.g., 60K vs 90K).

This cartridge assembly is compatible with intensifier pumps utilizing a .875 inch (7/8") plunger and is rated for both 60,000 PSI (approximately 4,137 bar) and 90,000 PSI (approximately 6,200 bar) operation . It is a standard component in KMT waterjet intensifier pumps, including PRO I, PRO II, PRO III, SL-IV, SL-V, and SL-VI series (15–60 HP), as well as WSI K-Series pumps (30–60 HP) .

Applications:

Seals the hydraulic (oil) side of the reciprocating piston assembly in waterjet intensifier pumps
Prevents hydraulic oil leakage and cross-contamination between the oil and water circuits
Installed within the hydraulic cylinder body, surrounding the piston rod or plunger
Suitable for ultra-high pressure waterjet systems operating at 60,000–90,000 PSI (approximately 4,137–6,200 bar)
Compatible with KMT (SL-IV, SL-V, SL-VI, PRO series) and WSI K-Series waterjet pumps

Features:

Pre-Assembled Configuration: Ensures correct seal orientation and stacking order, reducing installation errors
High-Pressure Rating: Engineered for continuous operation at 60,000–90,000 PSI (4,137–6,200 bar)
Premium Materials: Manufactured from high-pressure-rated materials including polyurethane, PTFE, and high-durometer elastomers for extended service life
Anti-Extrusion Design: Includes rigid backup rings to prevent seal deformation under high-pressure cycling
Dynamic Sealing Capability: Designed for reciprocating motion applications on the hydraulic piston assembly
OEM Compatibility: Direct replacement for KMT part numbers 05130091, 05009030, and others
Repairable Design: Can be rebuilt using dedicated repair kits (e.g., KMT #80084759)

Maintenance:

When to Replace:

External Hydraulic Leakage: Visible oil weeping from the pump cylinder area or weep holes indicates cartridge seal failure requiring replacement
Hydraulic Oil Contamination: Milky or discolored hydraulic oil may indicate water intrusion past the cartridge seals
Pressure Drop or Erratic Cycling: Inability to maintain rated cutting pressure or irregular intensifier cycling suggests internal seal degradation
Regular Preventive Maintenance: Manufacturers recommend inspecting hydraulic seal cartridges during scheduled pump overhauls (typically every 4,500–5,000 operating hours)
During Major Pump Rebuild: When performing major maintenance on the intensifier pump, replace or rebuild the hydraulic cartridges

Inspection and Replacement Guidelines:

Full Depressurization (Critical): Before any maintenance, fully depressurize both the hydraulic system and the high-pressure water system, disconnect power, and follow lockout/tagout procedures
Clean Room Conditions: Perform seal replacement in a designated clean area to prevent contamination of new seals with abrasive particles
Use Proper Tools: A specialized cartridge removal tool is available to extract the cartridge from the hydraulic cylinder head . Use plastic or wooden dowels for seal removal; do not use metal tools that could scratch the cartridge body
Inspect Cartridge Body: Before rebuilding or reinstalling, inspect the cartridge body for scratches, deformation, or signs of metal-to-metal contact
Lubrication: Apply manufacturer-recommended high-pressure grease (e.g., FML-2) to all seal components and the cartridge body during installation
Seal Orientation: Install seals starting from the center and working toward the ends. Ensure proper orientation of U-cup packing seals as illustrated in the service manual
Verify Installation: After reassembly, verify that the plunger moves freely when handled. Slowly pressurize the system and check for external leakage before returning to full operation
Repair Kit Option: Instead of replacing the entire cartridge, the seals can be removed and replaced using a dedicated repair kit (e.g., KMT #80084759)