Carefully selecting the materials of construction, whether for the structure, or for the seals and for the wear components, made as a function of plant type and the fluids to be handled, allows the problems related to pumping of liquids "at risk" to be solved safely and efficiently; even in the most complex working processes.
PP (Polypropylene)
Characterized by good mechanical properties, broad resistance against chemical agents and a high operating temperature. Not suitable for strongly oxidizing concentrated acids and halogens (fluorine, chlorine, bromine, iodine). Maximum operating temperature: 90°C
PVC (Polyvinyl chloride)
Material widely used in plant engineering applications. Resistance to acids, bases, saline solutions and organic compounds. Not suitable for aromatic and chlorinated hydrocarbons. Maximum operating temperature: 45°C
PVDF (Polyvinylidene fluoride)
Features an exceptional resistance to acids, saline solutions, aliphatic, aromatic and chlorinated hydrocarbons, alcohols and halogens. Not suitable for organic bases, alkaline solutions, ketones, esters and ethers. Indicated for the semiconductor industry and for liquids to be protected from contamination. Maximum operating temperature: 100°C
PE-HD (High-density polyethylene)
Chemical resistance similar to polypropylene. Valued for its abrasion resistance. Maximum operating temperature: 60°C
EPDM (Ethylene-propylene rubber)
Elastomer with high modulus of elasticity, strong resistance to acids, bases, alcohols ketones. Not recommended for hydrocarbons, oils and greases. Maximum operating temperature: 90°C
FPM (Fluoroelastomer rubber)
Features high thermal stability, low permanent deformation and high chemical resistance against acids, solvents, lubricants or fuels.
Sintered Ceramic (Al203 99%)
Base material for seal rings and parts subject to wear. Superior hardness, wear resistance and resistance against chemical agents. Not recommended in the presence of hydrogen fluoride, sodium carbonateand sodium hypochlorite at high concentrations and temperatures.
Sintered silicon carbide (SiC, without free silicon)
Material with characteristics more resistant than aluminum oxide: greater resistance to thermal shock and chemically inert at the operating temperatures of the plastic pumps.
PTFE (Polytetrafluorethylene)
Chemically inert up to 250°C in the presence of any chemical agent, the only substances for which it is not recommended are cast alkaline metals, chlorine trifluoride and gaseous fluorine at high temperatures. It may be 'loaded' with materials such as glass or ceramic or with graphite and carbon. Excellent for seal components and wear bushings.
FEP – PFA
Fluoropolymer with chemical resistance characteristics similar to PTFE but with less permeability. Suitable for welding processes: it is used for covering mechanical seal and O-ring springs.