Polytetrafluoroethylene (PTFE)

Polytetrafluoroethylene (PTFE)

PTFE is the most chemically inert man-made compound known. Newdiaphragm design and material processing have significantly improvedflex life, which is now equivalent to or exceeding rubber compounds. Abacker diaphragm is used to provide additional support.


* Not Available in all models
**Maximum temperaturelimits are based on mechanical stress only. Certain chemicals cansignificantly reduce the maximum safe operating temperature.

Halogenated Solvents Explosion Hazard

Pump models containing aluminum wetted parts cannot be used with111.-Trichloroethylene, Methylene Chloride, or other HalogenatedHydrocarbon solvents that react and explode. Although manufacturers ofthose solvents typically add inhibitors to prevent a reaction, thereis no assurance that they will prevent a reaction under allconditions. Special caution should be exercised when handlingreclaimed or used solvents since the inhibitors are often degraded.Only Stainless Steel, Acetal, or PVDF pumps should be used for thesematerials. Other examples of Halogenated Hydrocarbon Solvents (H.H.C.)include, but are not limited to, the following: Trichloroethane,Methyl Chloride, Carbon Tetrachloride, and Chloroform Dichlorethylene.

Wet End Material Compatibility Guide

Non-Metallics

Polypropylene – A general purpose low cost material havingbroad chemical resistance for use in a wide variety of chemical applications.

Kynar (PVDF) – A high performance fluorpolymer resin withexcellent chemical resistance properties. Used for pumping aggressivechemicals at elevated temperature. Material also has excellentmechanical properties.

Groundable Acetal – An excellent material for use in solventtransfer applications. The material incorporates metallic fibers inthe resin to render the material conductive to eliminate static chargebuild up and potential static discharge.

Rating
A = Excellent | B = Good | C = Fair | D = Poor

Non-Metallic Wet End Materials
Temperatue Limits**
Acid Service
Caustic Service
Solvents (Ketones/Acetates
Hydrocarbons Aromatic/Chlorinated
Polypropylene
+32˚ to 175˚F
A
A
NR
NR
PVDF
+10˚ to 200˚F
A
A
*
*
Groundable Acetal
-20˚ to 180˚F
D
D
A
A

*Check chemicalcompatibility guide for part specific solvent or hydrocarbon.
**Maximum temperature is based on mechanical stress only. Certainchemicals can significantly reduce maximum safe operating temperature.