20427648 waterjet valve
Product ID: 20427648 – 3-Port Pneumatic Dump Valve Body (Bleed Down Valve Body)
Description:
This component is a three-port (3-port) pneumatic valve body, specifically a round-style bleed down valve body or dump valve body, designed for ultra-high pressure (UHP) waterjet cutting systems . It serves as the main housing that directs and regulates the flow of high-pressure water through the pneumatic dump valve assembly, providing a rapid pressure release function for the cutting system .
The valve body is configured as a normally open (NO) three-port round pneumatic valve body used in 60,000 PSI (approximately 4,137 bar) waterjet systems . The two side ports feature 3/8-inch high-pressure (HP) connections, while the bottom port is designed for a specific adapter (VL49830904) .
Applications:
Used as the primary dump valve body in the pneumatic dump valve assembly of waterjet intensifier pumps and cutting systems
Installed in the high-pressure water line between the intensifier pump outlet and the cutting head to enable rapid pressure bleed-down during emergency stops, program pauses, or tool changes
Suitable for ultra-high pressure waterjet systems operating at 60,000 PSI (approximately 4,137 bar)
Compatible with KMT, Waterjet Sweden, Multicam, Caretta, TechniJet, FLOW, OMAX, and WSI waterjet intensifier systems
Features:
Three-Port Pneumatic Design: Precision-machined three-port configuration with two side ports (3/8" HP connection) and one bottom port for rapid pressure release
Normally Open Configuration: Default state is open, allowing high-pressure water to flow; pneumatic actuation is required to close the valve
High-Strength Material: Manufactured from high-grade steel or stainless steel, offering superior corrosion resistance, durability, and dimensional stability under extreme pressure cycling
CNC-Machined Precision: CNC-machined to exact tolerances with high dimensional accuracy for perfect fit, airtight sealing, and leak-free operation
High Fatigue Resistance: Manufactured with advanced heat treatment processes (solid solution double-aging) and high-pressure bore mirror finishing to increase metal fatigue resistance
Smooth Shifting and Accurate Timing: Ensures smooth intensifier shifting, stable hydraulic cycling, and consistent pressure output for reliable cutting performance
Product Weight: Approximately 0.24 kg to 1.32 kg (0.53–2.91 lbs) depending on source
OEM Compatibility: Replaces OEM part numbers including 5000398 and cross-references with VL20427648
Maintenance:
Critical Safety Component: The dump valve body is a safety device designed to instantly release high pressure from the system. Proper maintenance is imperative to prevent potential injury
Inspection: During pneumatic valve or intensifier overhaul, inspect the valve body for signs of cracking, corrosion, pitting, erosion, or thread damage. Pay particular attention to internal flow passages and sealing surfaces
Thread Inspection: Check all threaded ports (two side 3/8" HP ports and bottom port) for signs of wear, galling, corrosion, or deformation. Damaged threads can cause high-pressure leaks
Seal Replacement: When servicing the dump valve assembly, always replace all associated seals, O-rings, and gaskets. Do not reuse old sealing components
Full Depressurization (Critical): Always fully depressurize both the hydraulic system and the high-pressure water system, and vent compressed air supply, before removing or servicing the valve body. Follow lockout/tagout procedures to prevent severe injury from high-pressure water release
Internal Passage Cleaning: Clean the internal flow passages thoroughly using low-pressure water and a soft brush. Remove all debris, mineral deposits, or old seal residue that could restrict flow or damage downstream components
Torque Compliance: When reinstalling, tighten all connections (gland nuts, adapters) to the specific torque values listed in the equipment service manual. Over-tightening may damage threads; under-tightening may cause high-pressure leaks
Thread Lubrication: Apply manufacturer-recommended high-pressure thread lubricant or anti-seize compound to all threads during reassembly to prevent galling and ensure accurate torque application
Replacement Criteria: Replace the valve body if cracks, severe corrosion, internal erosion, or thread damage is detected. Do not attempt to repair a cracked or severely eroded valve body
Compatibility Verification: Before installation, verify that the valve body matches the specific waterjet system model and pressure rating (60,000 PSI) and is compatible with the appropriate adapter (VL49830904) for the bottom port
Port Adapter Note: The bottom port requires a special adapter (VL49830904) for connection to the high-pressure water system. Ensure this adapter is present and in good condition during installation
