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Valco Instruments Co. Inc. Sales:
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general reference
Properties of Metals
Titanium
Although it is more difficult to machine than
common alloys containing aluminum and
vanadium,Valco uses Grade 2 pure titanium
in order to avoid possible contamination of
the sample stream with these metals.
Good for organic and inorganic salts except
aluminum and calcium chlorides, and all alkalis
except boiling concentrated potassium hydroxide.
Good with dilute, low temperature formic, lactic,
sulfuric, hydrochloric, and phosphoric acids, but
rapidly attacked by hydrofluoric acid. Good with
dilute nitric acid at low temperatures; corrodes at
high concentrations and temperatures. Can ignite
with fuming nitric acid. Attacked by oxalic acid,
concentrated phosphoric acid, hot trichloroacetic
acid, and zinc chloride.
Due to the nature of this metal, valves made of
titanium typically have a shorter lifetime than HPLC
grade stainless steel or Hastelloy C-22.
Zirconium
Excellent resistance to hydrochloric acid, good
with hot sulfuric acid at concentrations up to 70%
and boiling nitric acid at up to 90%. Attacked by
hydrofluoric acid.
Brass
Used where a soft metal ferrule is desirable but no
corrosive materials are present. Although Valco
brass ferrules work as replacements in inexpensive
commercial brass fittings, they are generally not
recommended for chromatography applications.
material availability
by product line
Note: This list represents materials available in at
least some of the products in the lines listed. Not all
products in a line are available in all the materials
mentioned.
Fittings
Cheminert
CTFE
PEEK
PFA
Polypropylene
Stainless steel,Type 316
Valco
300 series stainless steel
PEEK
Ferrules
Valco
CTFE
FEP
Hastelloy C
Nickel
PFA
Polyimide, graphite
Polyimide,Valcon
Polyimide, virgin
PTFE, virgin
PTFE, glass-filled
Stainless,Type 303
Stainless,Type 316
Stainless, gold-plated
Titanium
Brass
Cheminert
PEEK
Tubing
Electroformed nickel
(EFNI)
ETFE
FEP
Hastelloy C
Nickel 200
PEEK
PTFE
Stainless steel,Type 316
Titanium
Valve rotors
Cheminert
Valcon E
Valcon E2
Valcon E3
Valcon H
Valcon M
Valcon P
Valcon T
Valcon TF
Diaphragm
A specialized polyimide
Valco
Valcon E
Valcon E2
Valcon H
Valcon M
Valcon P
Valcon R
Valcon T
Valcon TF
Valve
stators/ bodies
Cheminert
CTFE
Hastelloy C
Nitronic 60 stainless
PAEK
PPS
PVDF
Stainless steel,Type 316
Titanium
Diaphragm
Hastelloy C
Nitronic 60
Stainless steel,Type 316
Valco
Hastelloy C
Inconel 600
Monel 400
Nickel 200
Nitronic 50
Nitronic 60
Stainless steel,Type 316
Titanium
Zirconium
CHROMalytic TECHnology Pty Ltd AUSTRALIAN Distributors e-mail:
Tel: 03 9762 2034
