Nc UHP O-Ring-Seal-Pneumatic-Valve-Repair-Kit-05116025-Good-Quality-Water-Jet-Parts-p.html target='_blank'>Pneumatic Valve Repair Kit 20477521 Pump Replacement Parts

The part 20477521 is a normally-closed pneumatic valve repair kit for 90 000 psi (6 200 bar) Intensifier-Assembly-80072333-Good-Quality-Water-Jet-Parts-In-Stock-p.html target='_blank'>Intensifier dump valves, containing all internal seals, Backup Rings, Valve Stem, and seat needed to rebuild the on/off valve actuator without a full assembly replacement.

The 20477521 repair kit includes:
Seal Assembly: Top actuator O-ring and seal assembly
Valve Seat: Precision-machined seat for leak-free closure
Valve Stem: Flat-end stainless sTeel stem (NC type)
Backup Rings: Brass and stainless steel rings to support seals
O-Rings: Two O-rings for stem and Piston-Seal-1-11673-Abrasive-Waterjet-Parts-With-Good-Quality-Supplier-p.html target='_blank'>Piston Sealing
Bearing Disk: Ensures smooth piston movement and correct alignment

Specifications
Valve Type:Normally-Closed Pneumatic Dump Valve
Rated Pressure:90 000 psi (6 200 bar)
Actuation Medium:Clean, dry compressed air (80–100 psi)
Seal Materials:O-rings; PTFE backup rings
Valve Stem Material:Stainless steel
Kit Weight:~0.062 lbs (28 g)

Installation & Maintenance
Depressurize: Fully isolate hydraulic and pneumatic supplies; relieve all pressure.
Remove Valve: Unscrew the dump valve from the intensifier manifold; disconnect air lines.
Disassemble: Remove old seals, backup rings, seat, and stem. Inspect bore and components for wear.
Rebuild: Install new kit components in correct sequence: O-rings → backup rings → seat → stem → bearing disk.
Reassemble & Test: Reinstall valve, reconnect air, cycle at low pressure to check for leaks, then ramp to full 90 K psi and verify proper operation

If you need other Techni Waterjet Parts,Please contact us!