VICI M Series - Manual (Page 23)

19
Model M50
Valcon H2
The M50 cap is a carbon fiber-reinforced, PTFE-lubricated inert polymer.
This material is routinely used at 5000 psi at temperatures not more than
75°C.
Ceramic
The M50 pump rotor is made of ceramic (ZrO
2
), which is resistant to most
chemicals.
PTFE
The piston tips are made from PTFE. Polytetrafluoroethylene is the generic
name for the class of materials such as Teflon
® . It offers superior chemical
resistance and lends itself to good sealing characteristics. Because it’s so
easy to handle, it is often used in low pressure situations such as the M50
pump. Compounds of low molecular weight can permeate PTFE.
Guidelines
Specific reagent combinations should be tested to insure compatibility with
pump components. Since the least chemically inert component in these
composites is PEEK, for optimum component lifetime the following guide-
lines* (for PEEK at room temperature) should be followed:
Acids and bases ...................No stronger than 1 M (exceptions noted below)
Sulfuric acid ..........................Resistant to 10%
Hydrochloric acid ..................Resistant to 20%
Hydrofluoric acid ...................Not resistant to 40% (no data on lower conc.)
Nitric acid ..............................Resistant to 10%
Dibutylamine in Toluene ........Not rated
Sodium hydroxide .................Resistant
Hydrogen sulfide ...................Resistant
Methyl mercaptan .................Not rated
Acetone ................................Resistant (see Viton
® note on previous page)
Methyl ethyl ketone ...............Resistant
Methyl alcohol .......................Resistant
Toluene .................................Resistant
Xylene ...................................Resistant
Chloroform ............................Resistant
Chlorobenzene .....................Resistant
Iodine/iodide in water ............Not rated
Sodium hypochlorite .............Resistant
(household bleach)
Permanganate ......................Resistant
Hexane .................................Resistant
* Corrosion Resistance Tables, Schweitzer, Marcel Dekker, 1991