Techcon P3018EPK 30cc EPR O-Ring, Dispensing Valve Parts, Pack of 10

Description

The Techcon P3018EPK is a replacement EPR O-ring sized for 30cc syringe barrel and adapter assemblies, sold in packs of 10. It seals the connection where the barrel adapter meets the dispensing valve parts that control fluid flow, so a worn or hardened O-ring here is a common source of a slow leak or an inconsistent bead that otherwise looks like a valve problem.

EPR (ethylene propylene rubber) is the general-purpose choice across most water-based and many solvent-free adhesive and sealant chemistries. Techcon also sells this same 30cc/55cc size in Viton under part number P3022VPK for shops running more aggressive fluids or solvents that would swell or degrade EPR over time.

Dispensing Valve Parts Specifications

• Application: 30cc syringe barrel / adapter assembly seal
• Inside diameter: 17.5 mm
• Cross section: 2 mm
• Material: EPR (ethylene propylene rubber)
• Color: black
• Packaging: 10 O-rings per pack
• Compatible alternate: P3022VPK (same size, Viton compound)

Why These Dispensing Valve Parts Wear Out First

O-rings are a maintenance item long before the barrel or valve body itself needs replacing. Every time an operator disconnects and reconnects a syringe barrel from its adapter, the seal takes a small amount of wear, and repeated exposure to adhesive chemistry can dry out or swell the rubber depending on the compound. A shop running high daily cycle counts on 30cc barrels should keep a pack of these on hand rather than waiting for a visible leak to show up mid-run, since a hardened O-ring often shows up first as inconsistent shot size rather than an obvious drip.

Matching the O-ring compound to the fluid in use matters more than it looks. EPR handles most standard adhesives, sealants, and water-based fluids without issue, but shops dispensing solvents, some cyanoacrylates, or aggressive cleaning fluids through the same barrels should confirm chemical compatibility before defaulting to EPR, and step up to the Viton version if there is any doubt.

Chemical Concepts carries this O-ring alongside the full line of Techcon dispensing valves, mixers, and nozzles, so replacement seals, barrels, and needles can ship together. For help matching an O-ring compound to your fluid, call (800) 220-1966 or email [email protected]. Techcon’s syringe barrel accessory resources list compound compatibility by chemistry family.