Product Name: Bent HP Tube (1/4″) – Part No. 20498652

Description:
The Bent HP Tube 20498652 is a pre‑formed, rigid high‑pressure (HP) fluid conduit designed for waterjet cutting systems operating up to 60,000 PSI (approximately 4,137 bar). The “25” designation typically indicates a 1/4 inch (6.35 mm) outer diameter, the industry standard for smaller high‑flow waterjet plumbing.

Manufactured from corrosion‑resistant stainless steel, the tube features a precision‑machined 60‑degree cone seat on each end for metal‑to‑metal sealing. The tube is pre‑bent to a specific geometry (e.g. 90°) to route high‑pressure water around machine components without requiring field bending. It serves as a permanent, vibration‑resistant connection between the intensifier pump, on/off valve and cutting head.

Applications:

• Changing the direction of high‑pressure water flow by a specific angle (e.g. 90°) to route plumbing around the Z‑axis slide or gantry.

• Connecting the outlet of the on/off valve (water switch) to the inlet of the cutting head rotary joint.

• Providing a rigid, leak‑free fluid passage in space‑constrained areas where flexible hose is not suitable.

Features:

• Pre‑formed Geometry: Eliminates the need for field bending, which can weaken the tube and create stress risers.

• High‑Strength Material: Manufactured from stainless steel to withstand continuous pressure cycling up to 60,000 PSI.

• Cone Seat Ends: Precision‑machined 60‑degree cone sealing surfaces for a reliable metal‑to‑metal seal with standard HP fittings.

• Corrosion‑Resistant: Resists pitting and degradation from water and abrasive dust.

Maintenance:

Failure Diagnosis (When to Replace):

• Visible Cracks or Deformation: Any cracking, bulging or permanent bending of the tube warrants immediate replacement.

• Deep Scratches or Gouges: Surface damage that penetrates the protective layer can act as a stress riser and lead to fatigue failure.

• Cone Seat Damage: Nicks, galling or pitting on the 60‑degree cone sealing surface will cause high‑pressure leaks.

• External Water Leakage: Persistent weeping from the tube connections indicates a failed cone seal, damaged threads or insufficient torque.

Inspection & Replacement Guidelines:

• Full Depressurisation (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, bleed down all high‑pressure lines, and follow lockout/tagout procedures. Never service a pressurised HP line.

• Visual Inspection: Examine the tube and both cone seats for damage before installation. Pay special attention to the outer radius of the bend, where stress is highest.

• Vibration Damping: Ensure the tube is properly secured with clamps or brackets. Excessive vibration leads to fatigue failure at the bend or end fittings.

• Thread Care: Clean all threads and cone seats thoroughly before assembly. Use a dedicated HP tube cleaning brush.

• Lubrication: Apply a thin, even layer of high‑pressure anti‑seize compound to the male threads of the gland nuts only. Do not apply lubricant to the cone sealing surfaces.

• Torque Compliance: Tighten the gland nuts to the torque value specified in the equipment service manual (e.g. 50 ft‑lbs for 1/4″ HP connections). Use two wrenches (one to counter‑hold the tube) to avoid twisting stress.

• Replacement: Do not attempt to straighten or re‑bend a pre‑formed tube; this work‑hardens the metal and creates stress risers. Replace the tube immediately if any damage is detected.

Cross‑Reference Information:

• H2O Jet #20498652

• Compatible with 60K waterjet intensifier systems

• 1/4″ OD, pre‑bent HP tube

• Used with standard 1/4″ high‑pressure fittings (gland nut and cone)