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Progressing cavity pumps I n v e n t e d by Professor Rene Moineau in the 1930s, the p r o g r e s s i n g cavity is a versatile r o t a r y positive display cement pump. Finding application in m a n y industries, a wide choice is n o w a v a i l a b l e f r o m manufacturers a r o u n d the worlcL
## NEWS savings in installation and system costs, says Durco, and on most applications the need for a by-pass line or external flushing can be eliminated. The Durco Seal Sentry FM series consists of five models which are suitable for virtually all proprietary seals and most Durco pumps. According
EQ UIPMENT NEWS requirements in the low pressure range and is distinguished by high safety s t a n d a r d s . A mechanically a c t u a t e d 4-layer sandwich diaphragm design of pure PYFE is the heart of this m e t e r i n g p u m p series. It is resistant against nearly all chemicals which must be