FreFlow - Self-priming centrifugal pumps
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FreFlow Self-priming centrifugal pumps

SPX has many years experience in designing, manufacturing and maintaining self-priming centrifugal pumps for contaminated liquids. On the basis of this experience, the FreFlow FreFlow – Self-priming centrifugal pumps for various applications pumps were developed to cover a broad field of applications. High priority has been given FreFlow pumps are self-priming centrifugal pumps suitable for handling to the design ensuring easy operation and contaminated and low-viscosity liquids. Its innovative design, eliminating the amazing reliability. need for a non-return valve, results in less...

Typical product applications From know-how to finding solutions Petrochemical K E Y F E AT U R E S • Excellent self-priming ability • No non-return valve required in inlet • Oil bath for the mechanical seal • Ideal for handling contaminated liquids • Outstanding qualities for liquids containing gas or air • Easy maintenance (back pull-out) • Easy operation • Mechanical seals to EN 12756 (DIN 24960) Industrial Water The FreFlow has been designed to meet the customer’s needs for handling contaminated liquids as well as liquids General Industry containing air or gas. The compact design makes...

N O N O N - R E T U R N VA LV E R EQU I R E D I N TH E I N LET • Easy operation • Less maintenance E XC E L L E N T S E L F - P R I M I N G AB I LITI E S • Ability to handle liquids containing air or gas • A separate vacuum pump nor any other equipment is required MOD U LAR D E S IG N • 4 bearing bracket groups • Fewer parts thanks to high interchange-ability of parts within the range • Rugged construction D I FFE R E NT D R IVE POSS I B I LITI E S • Flexible operation • Adaptable to your systems I N S PE CTI ON AN D CLEAN I N G COVE R • Easy maintenance and cleaning

VA R I O U S S E A L O P T I O N S • Including double mechanical seals • Suitable for a variety of applications W E A R P L AT E • Easily replaceable • Simple and inexpensive maintenance • Extend pump life at maximum performance BAC K - P U L L - O U T SYS T E M • Easy maintenance • No need to remove from pipework OI L CHAM B E R • An oil chamber located behind the mechanical seal lubricates the seal faces when priming – thus preventing the seal from running dry • No crystallization between the seal faces • Longer seal life • Less risk of process downtime H E AV Y D U T Y B E A R I N G S •...

Technical data The FreFlow range consists of 19 pumps with connections from 32 mm to 150 mm, with a capacity of up to 300 m3/h and a delivery head of up to 70 meters. The self-priming ability is 7 meters. The maximum system pressure is 9 bar and the pumps can transport liquids with a viscosity of max 150 mPa.s. The pumps in the FreFlow programme offer flexible operation thanks to the different drive possibilities. FR E Pumps with bearing bracket FR E F Pumps coupled to a flange motor on extended shaft FR E S Pumps coupled to IEC standard motor FR E M Pumps coupled to a petrol or diesel engine

Operating principle The self-priming operation of the FreFlow is based on the injection principle. On start-up the air in the suction pipe is drawn into the pump, with the air and liquid mixture being compressed in the pump. This mixture flows to the top of the pump casing where the air separates from the liquid and is removed through the discharge pipe. The liquid recirculates in the pump casing until all air is evacuated from the suction pipe. The pump functions thereafter as a conventional centri-fugal pump. D: Impeller liquid. The special design prevents the pump emptying after it...

Self-priming centrifugal pumps Your local contact: Dr. A.F. Philipsweg 51, 9403 AD Assen P.O. Box 9, 9400 AA Assen, THE NETHERLANDS P: +31 (0)592 37 67 67 F: +31 (0)592 37 67 60 E: johnson-pump.nl@spx.com SPX reserves the right to incorporate our latest design and material changes without notice or obligation. Design features, materials of construction and dimensional data, as described in this bulletin, are provided for your information only and should not be relied upon unless confirmed in writing. Please contact your local sales representative for product availability in your region. For...