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31Z86 - ESAB 31Z86 Regulator Safety Disc Retaining Cap

Packaging: pack of 1
$35.50/EA $21.27/pack of 1 only $21.27/EASave 40%

Usually ships within 3-5 business days

OVERVIEW

Keep Your Regulator Safe with the ESAB 31Z86 Cap

Safety is the number one priority in any welding shop, especially when dealing with high-pressure compressed gases. The ESAB 31Z86 Safety Disc Cap is the small but mighty part that keeps your oxygen or acetylene regulator from turning into a hazard. This brass cap screws into the side or back of your regulator and holds the safety rupture disc in place. If your regulator ever experiences a massive pressure surge, that disc is designed to pop to release the pressure safely. This cap is what makes sure the disc stays where it belongs until that moment comes.

Over time, these caps can get lost during repairs, or the threads can get stripped if they are cross-threaded. Sometimes, they just get beat up in a busy shop environment. If you are rebuilding a Purox or Oxweld regulator, or if you've had a safety disc blow and need to inspect the assembly, you need to make sure this cap is in perfect condition. A damaged cap might not hold the pressure correctly or could prevent the safety device from working when you need it most.

Don't take chances with "making it work" using random bolts or fittings. Gas regulators are precision instruments. This genuine ESAB part is designed to fit perfectly, ensuring your gear meets safety standards and keeps you welding without worry. It’s a simple, affordable fix that protects your expensive equipment and, more importantly, you and your crew.

Why Choose Genuine Parts?

  • Perfect Fit: No fighting with mismatched threads.
  • Safety First: Designed to vent gas safely if the relief valve trips.
  • Durability: Solid brass construction stands up to shop abuse.
  • Peace of Mind: Know your regulator is assembled correctly.
Additional Information
Brand:ESAB
Product Type:Safety Cap
Packaging Description:1 Per Ea
Material:Brass
Compatible Equipment:Purox Regulators, Oxweld Regulators, ESAB R-Series
Part Type:Replacement Part
Application:Gas Regulation Safety

INCLUDED

  • 1 x 31Z86 Safety Disc Cap

APPLICATIONS

  • Repairing ESAB, Purox, and Oxweld gas regulators
  • Replacing blown safety rupture disc assemblies
  • Routine maintenance of oxy-fuel cutting and welding equipment
  • Restoring vintage regulators to safe working condition

FAQ

The 31Z86 cap screws into the regulator body to hold the safety rupture disc in place, ensuring the pressure relief mechanism functions correctly.

No, the 31Z86 is the cap only. The safety rupture disc and washers are typically sold separately.

It is machined from high-quality brass.

It fits a variety of ESAB, Purox, and Oxweld regulators, particularly the R-series models.

If the cap is cracked or the threads are damaged, yes. However, a leak usually indicates the rupture disc underneath has failed and needs replacement as well.

Absolutely not. This cap is designed with specific dimensions and often venting features to allow the safety device to operate. Using a bolt creates a bomb hazard.

It should be tightened to the manufacturer's specified torque settings to ensure the disc seals but is not crushed. Consult your regulator's service manual.

Yes, this is a genuine ESAB replacement part.