Pneumatic Valve Seal Assembly 20428052 Pump Replacement Parts
Pneumatic Valve Seal Assembly 20428052 Pump Replacement Parts
The part 20428052 is a seal assembly for the HP pneumatic on/off (dump) valve used in 60 000 psi (4 100 bar) waterjet Intensifier-Assembly-80072333-Good-Quality-Water-Jet-Parts-In-Stock-p.html target='_blank'>Intensifier pumps. This precision Seal Kit maintains airtight performance in normally-open pneumatic valve actuators, preventing hydraulic and air leaks that can compromise cycle control and machine safety.
Specifications
Valve Type:Normally-open pneumatic dump (on/off) valve seal assembly
Rated Pressure:60 000 psi (4 100 bar)
Operating Medium:Clean, dry compressed air (typically 80–100 psi supply)
Component Materials:O-Rings, PTFE Backup Rings, stainless sTeel bearing disk
Seal Cross-Section:0.25″ (6.35 mm) ID/OD format (0.25″ nominal diameter)
OEM SKU:20428052
Installation & Maintenance
Shutdown & Depressurize: Isolate hydraulic and pneumatic supplies; relieve system pressure.
Remove Valve Assembly: Unscrew the pneumatic valve from the intensifier manifold and disconnect solenoid wiring if present.
Disassemble Valve: Extract the old seal assembly—O-rings, backup rings, and bearing disk—using suitable picks or presses.
Inspect & Clean: DeGrease all mating surfaces and inspect the actuator bore for scoring or damage.
Install New Seal Kit: Lubricate new O-rings with manufacturer-approved lubricant; seat backup rings and bearing disk in correct orientation.
Reassemble & Test: Reinstall the valve, reconnect air and electrical, bring up to low air pressure for leak check, then ramp hydraulic pressure to verify proper dump action and Sealing.
Specifications
Valve Type:Normally-open pneumatic dump (on/off) valve seal assembly
Rated Pressure:60 000 psi (4 100 bar)
Operating Medium:Clean, dry compressed air (typically 80–100 psi supply)
Component Materials:O-Rings, PTFE Backup Rings, stainless sTeel bearing disk
Seal Cross-Section:0.25″ (6.35 mm) ID/OD format (0.25″ nominal diameter)
OEM SKU:20428052
Installation & Maintenance
Shutdown & Depressurize: Isolate hydraulic and pneumatic supplies; relieve system pressure.
Remove Valve Assembly: Unscrew the pneumatic valve from the intensifier manifold and disconnect solenoid wiring if present.
Disassemble Valve: Extract the old seal assembly—O-rings, backup rings, and bearing disk—using suitable picks or presses.
Inspect & Clean: DeGrease all mating surfaces and inspect the actuator bore for scoring or damage.
Install New Seal Kit: Lubricate new O-rings with manufacturer-approved lubricant; seat backup rings and bearing disk in correct orientation.
Reassemble & Test: Reinstall the valve, reconnect air and electrical, bring up to low air pressure for leak check, then ramp hydraulic pressure to verify proper dump action and Sealing.
