Thermoplastic ASTRA pumps
The current range of thermoplastic made pumps includes sizes from 1/4″ to 2″ inches.
The polymers used, depending upon the chemical resistance required are ;
Glass fibre reinforced Polypropylene ( PP ) and Carbon fibre reinforced Poly VinyliDene Fluorure ( PVDF ) ; glass or carbon fibres reinforcements increse the mechanical resistance at the max. admissible operating temperture.
All parts are injection moulded and sturdy.
On request and for a restriced choice of sizes we offer pumps constructed in pure PVDF.
The central casing is made of injection moulded glass fibre reinforced polypropylene for its broad chemical resistance to corrosive chemicals and corrosive atmosphere.
Thermoplastic diaphragms offer high resistance to chemical corrosion and abrasion and deliver long life cycles; are available in Keyflex®, Santoprene®, and Polyurethane. The broad range of applications these materials are adequate to, eases the choice of the correct execution of the pump materials’ specific for the application.
Elastomeric diaphragms deploy a blend of rubbers embedding a nylon mesh designed to increse their mechanical resistance.
Most common elastomeric rubbears are nitrilic (NBR) and ethylene propylene diene monomer (EPDM) based.
We offer both and on request and can deliver also fluorinted rubber FKM made diaphragms (e.g.: Viton®).
PTFE diaphragms, PTFE is the fluoro-polymer material with the broadest chemical resistance. Our PTFE diaphragms are manifactured with special process to be flexible and resistant and are always backed up by a rear diaphragm of thermoplastic rubber, which increases resistance and service life.