Seal On/Off Valve 302094 High Quality WaterWaterjet-Quartz-High-Pressure-Water-Jet-Cutter-With-Abrasive-p.html target='_blank'>Jet Cutting Machines Parts

The Seal Assembly, Stem, On/Off Valve (P/N 302094) is a precision-molded elastomeric seal that fits over the stem of the integrated on/off valve in Waterjet Cutting Heads, preventing high-pressure water from leaking past the valve stem. 

Material:High-performance elastomer (seal) and nitrile/synthetic O-ring (backup)
Pressure Rating:Up to 60,000 psi (4,100 bar)
Function:Seals valve stem to prevent leakage when the on/off valve is closed
Packaged as:Single seal assembly; also available in rebuild kits (e.g., On/Off Valve Rebuild Kit 301259)

Installation & Maintenance
Disassembly: Remove the integrated on/off valve body from the cutting head and unthread the gland nut to expose the valve stem
Seal Replacement: Slide off the old 302094 seal and backup O-ring. Inspect the stem and gland bore for nicks or wear.
Lubrication: Lightly coat the new seal and O-ring with compatible silicone grease to ease installation and prevent damage.
Reassembly: Install the seal onto the stem, replace the O-ring (if applicable), then reassemble the valve and torque the gland nut to OEM specifications.
Testing: Cycle the valve to ensure smooth operation and perform a seat test to confirm no leakage at maximum operating pressure.