Techcon Buna O-Ring, 9/16 Inch ID, Dispensing Valve Parts, 10 Pack

Description

This 9/16 inch ID Buna-N O-ring is one of the dispensing valve parts that keeps Techcon needle and spool valves sealing correctly under repeated cycling. It is sized for the TSD1400 service family used across several Techcon valve models, and it ships in packs of 10 so a maintenance bench can keep spares on hand instead of waiting on a single-unit reorder mid-run.

Where these dispensing valve parts fit

Buna-N (nitrile) is the standard seal material for general-purpose adhesive, sealant, and oil-based fluid dispensing where the material being dispensed is not aggressively solvent-heavy. This o-ring seats against the valve body and piston to prevent air or material bypass, so a worn or hardened seal here shows up as inconsistent shot size, dripping, or a valve that will not hold pressure between cycles. Left in service too long, a hardened seal can also score the piston bore, turning a cheap part swap into a bigger repair job later on.

Replacing these dispensing valve parts

Depressurize the valve, disassemble per the manufacturer’s service guide, and inspect the seal bore and piston surface for scoring before installing the new o-ring. A light coat of compatible o-ring lubricant eases installation and reduces first-cycle wear. Keep a full pack on the bench with tubing, fittings, and needle tips so a single failed seal does not stop a production run while a replacement ships. Logging the swap date and part number on the valve tag helps schedule the next preventive service interval accurately.

For related seals, valve bodies, and dispensing accessories, browse dispensing equipment parts, or visit Techcon for valve service documentation.

Need Help?

Need help matching an o-ring size or material to your valve model? Call (800) 220-1966 or email [email protected].