Self-priming Centrifugal Liquid Ring Pump0 pages

Standard design
Self-priming pumps.
The ability to maintain a vacuum under changing suction conditions
makes A Series pumps ideally suited for scavenge duties and
applications where the inlet pipework is only partially fi lled, or
where the incoming liquid includes entrained air or gas. The
construction materials and quick disassembly design make them
particularly suitable for a wide variety of applications.
They must be initially fi lled with liquid for the fi rst start-up;
afterwards, a small liquid reservoir remains to enable rapid selfpriming
to occur even if the suction pipe is emptied.
A 21- A 31: Close-coupled pumps with the impeller directly
supported by the electric motor shaft. Easy-opening front cover,
by unscrewing three hand-nuts, allows quick inspection without
disconnecting the inlet and outlet pipes.
A 41 - A 51 - A 66 - A 81: Close-coupled design with separate IEC
motor and fl exible coupling. Easy-opening front cover, for quick
inspection without disturbing the inlet and outlet pipes.
All CF-8M 1.4408 / AISI 316 Stainless steel parts.
Investment cast, with electro-chemical polishing.
Flow rates up to 50 m3/h, heads up to max. 35 m
(3,5 bar) (50 Hz).
Seals:
Mechanical seals with seats to EN 12756.
ISO 3069 standards.
Single internal mechanical seal
Single external mechanical seal
Elastomers (certifi ed to FDA):
EPDM
Fluorocarbon (Viton)
Silicone
P.T.F.E. (FEP)
Connections:
DIN - SMS - IDF - BS / RJT - DS - CLAMP and EN 1092-1
PN16 fl anges to suit most international standards.
Applications
A Series pumps are suitable for a wide range of liquids
(CIP solutions, juices, milk, whey, syrups, oil, wine, water,
spirits, chemical and pharmaceutical media).
Self-priming pumps
A series
A 21 - A31 pump
A 41 - A 51 pump
A 41 - A 51 pump with shroud