Ferrules - Metal

metal ferrules

Valco zero volume ferrules may be used with all Valco fittings and with those of most other manufacturers. Valco metal ferrules cut a ring near the end of the tube, preventing tube release at high pressures without significantly deforming and restricting the tube interior. (However, if the hardness of the tubing is equal to or greater than that of the ferrule, deformation of the tube rather than a cut ring is likely.)

Make up usually takes only about a 1/4 turn beyond the point where the ferrule first starts to grab the tubing. The maximum pressure limit is generally determined by the yield strength of the tubing. The exception is for very narrow bore Type 316 stainless steel tubing, where the maximum operational limit of Valco ferrules and fittings is 10,000 psi, regardless of the tubing strength. The maximum pressure for brass is lower, and depends on the tubing used. If you have questions about a particular tubing/ferrule combination, consult our technical staff.

Select a material below to view sizes and product numbers:

Stainless, Type 303
Stainless, Type 316
Stainless, gold-plated

Hastelloy C
Nickel
Titanium
Brass

Type 303 stainless ferrules - package of 10

Properties: general purpose; GC, gas lines

Size Product No.
1/32" ZF.5-10
1/16" ZF1-10
1/8" ZF2-10

Type 316 stainless ferrules - package of 10

Properties: LC with high chloride ions in solution

Size Product No.
1/32" ZF.5S6-10
1/16" ZF1S6-10
1/8" ZF2S6-10
1/4" ZF4S6-10

Gold-plated stainless ferrules - package of 10

Properties: more inert than standard stainless

Size Product No.
1/32" ZF.5GP-10
1/16" ZF1GP-10
1/8" ZF2GP-10
1/4" ZF4GP-10

Hastelloy C ferrules - sold individually

Properties: resistant to pitting; resists oxidizing atmospheres

Size Product No.
1/32" ZF.5HC
1/16" ZF1HC
1/8" ZF2HC
1/4" ZF4HC

Nickel ferrules - sold individually

Properties: resistant to caustics, high temp halogens, and hydrogen halides

Size Product No.
1/32" ZF.5NI
1/16" ZF1NI
1/8" ZF2NI
1/4" ZF4NI

Titanium ferrules - sold individually

Properties: outstanding resistance to most media except hydrofluoric acids

Size Product No.
1/32" ZF.5TI
1/16" ZF1TI
1/8" ZF2TI
1/4" ZF4TI

Brass ferrules - package of 10

Not recommended for most chromatographic applications

Size Product No.
1/32" ZF.5B-10
1/16" ZF1B-10
1/8" ZF2B-10
1/4" ZF4B-10

MORE INFORMATION

SEE ALSO

TECH TIPS

  • For trace gas analysis, use gold-plated ferrules to achieve sealing with <10-9 cc/atm/sec leakage.
  • Identification
    To differentiate among the most commonly ordered metal ferrules, rings are engraved on the non-sealing surfaces. Click here to view a drawing.

METALS AT A GLANCE

  • Stainless, type 303
    GC, gas lines, general purpose
  • Stainless, type 316
    LC with high chloride ions in solution
  • Stainless, gold-plated
    More inert than standard stainless
  • Hastelloy C
    Resistant to pitting; resists oxidizing atmospheres
  • Nickel
    Resistant to caustics, high temp halogens, and hydrogen halides
  • Titanium
    Outstanding resistance to most media except hydrofluoric acids
  • Brass
    Not recommended for most chromatographic applications