Techcon TSD400-80 Teflon U-Cup Seal With Viton O-Ring

Description

Techcon TSD400-80 U-Cup Seal With Viton O-Ring is a dispensing valve parts item for Techcon spray and needle valve service. It replaces the seal set called out as a Teflon U-cup with Viton O-ring, helping maintenance teams rebuild valve assemblies without replacing the full dispensing valve.

dispensing valve parts Service Use

• Replacement seal work on compatible Techcon spray and needle valves.
• Maintenance benches stocking seals, O-rings, rods, retainers, and fittings.
• Dispensing stations handling adhesives, coatings, greases, or other controlled fluids.
• Planned rebuilds where small wetted parts are changed before valve performance drifts.
• Repair kits kept near mixing nozzle, 2 part mixing nozzle, and jb weld mixing nozzle inventory.

Use this part when the valve body, service guide, or removed component calls for TSD400-80. Small seals can look similar, so confirm the part number before installation. Clean the valve cavity, stem, and mating surfaces before the new seal goes in, and remove cured material that could cut or distort the replacement.

dispensing valve parts Handling Notes

Seal replacement is a good time to inspect the rest of the fluid path. Check nearby O-rings, seats, fasteners, and wetted surfaces for flattening, swelling, scratches, or chemical attack. A new seal will not correct a damaged stem or contaminated bore.

After reassembly, start with a controlled test shot and confirm shutoff before returning the valve to production. Keep this part with the rest of the valve-service spares so a technician can complete the rebuild without stopping to locate a small component.

For spray and needle valves, seal condition affects both leakage control and deposit repeatability. A worn seal can allow material to weep after shutoff or can let air and fluid behave inconsistently during cycling. Replacing the seal during planned maintenance helps avoid a longer teardown after cured material reaches areas that should stay clean.

Store service parts by valve family and keep them sealed until use. Do not leave small seals loose on a bench where metal chips, abrasive dust, or dried adhesive can cling to the surface. During rebuild work, lay out the removed parts in order so the technician can compare the old seal stack to the replacement before final assembly.

dispensing valve parts Specifications

For related valves, fittings, tips, and service items, browse dispensers, mixers, and nozzles. Current manufacturer information is available from Techcon.

Need Help?

Need help confirming a seal for your valve body or rebuild list? Call (800) 220-1966 or email [email protected].