The Dynamic Seal 302951 is an OEM-style seal designed for high-pressure Pump-5-Axis-Waterjet-Cutting-Machine-For-Carbon-Fiber-p.html target='_blank'>Waterjet Pumps, providing dynamic sealing between the hydraulic piston and cylinder bore to prevent fluid bypass and maintain consistent cutting pressure. With an outer diameter of 0.570″ and inner diameter of 0.311″, it’s molded from a gray, high-resilience elastomer to withstand repeated cycling up to 60 000 psi .
Specifications
Manufacturer / OEM Part: 302951
Outer Diameter (OD): 0.570 in (14.48 mm)
Inner Diameter (ID): 0.311 in (7.90 mm)
Cross-Section: Standard dynamic seal profile
Material: Gray elastomer (proprietary blend for high-pressure wear resistance)
Pressure Rating: Up to 60 000 psi (4 100 bar)
Operating Temperature: −20 °F to +200 °F (typical elastomer range)
Installation & Maintenance
Depressurize System: Safely relieve pump pressure and drain fluid before disassembly.
Disassemble Piston Assembly: Remove the cylinder head and extract the piston per OEM service manual.
Remove Old Seal: Pry out the worn dynamic seal using a non-marring pick.
Inspect Components: Clean and inspect piston and bore for scoring; polish minor imperfections.
Install New Seal: Lubricate seal lip with pump oil, press into gland groove ensuring flush seating.
Reassemble & Test: Reinstall piston, cylinder head, repressurize slowly, and verify stable pressure under no-load conditions.
