Pulsafeeder Eclipse Model 75 - Manual (Page 7)

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1. Introduction
1.1 General Description
Pulsafeeder’s Eclipse Standard/Eclipse Hypo Series pumps safely handle hazardous, highly corrosive, explosive
or toxic chemicals. Eclipse Hypo Series pumps were designed specifically for installation into Sodium
Hypochlorite applications. The Eclipse Standard/Eclipse Hypo Series pumps provide safe, leak-free service
because the magnetic coupling eliminates the need for traditional sealing methods, such as mechanical seals or
packing.
Eclipse Standard/Eclipse Hypo Series gear pumps mount to standard NEMA 56C, 143/145TC and 182/184TC
motors and IEC 63, 80, 100 and 112 B14 metric flanged (C-face) motors. This enables the pumps to be close
coupled, which provides greater assembled strength, complete isolated enclosure of all moving parts, and compact
design. This also eliminates the need for special base plate mounting, shaft couplings and guards, complicated
drives, and pump bearing lubrication and maintenance, while minimizing plant real estate for optimum pump
installation.
All Eclipse Standard/Eclipse Hypo Series pumps transmit rotational torque from the motor shaft to the pump shaft
by means of a magnetic drive coupling. The principle of operation of the magnetic drive coupling is that an
encapsulated driven magnet assembly is mounted on the end of the pump shaft. It is then contained by a closed
end containment shell or “containment can” which seals against the pump center housing with a static o-ring. A
drive magnet assembly attached to an electric motor shaft rotates around the containment can. When the drive
magnet assembly rotates, lines of magnetic flux or force cause the driven magnet assembly to rotate which in turn
causes the pump shaft to rotate.
All magnetic drive couplings are designed for satisfactory operation of the pump. The magnetic couplings have an
integral safety feature that allows them to “decouple” if the coupling torque limit is exceeded. This situation
might occur if foreign material were to jam the pump gears or if unusually high torque was developed on pump
start-up. Eclipse Standard/Eclipse Hypo Series pumps use permanent rare earth Neodymium Iron magnets that
can run decoupled without losing their magnetic strength provided magnet temperatures do not exceed 450
0 F
(232
0
C).
I F THE PUMP IS ALLOWED TO RUN FOR AN EXTENDED PERIOD OF TIME DECOUPLED , HIGH
TEMPERATURES COULD BE GENERATED THROUGH OPPOSING MAGNETIC FORCES THAT
ULTIMATELY WOULD CAUSE THE LOSS OF MAGNETIC STRENGTH .
Eclipse Standard/Eclipse Hypo Series pumps feature continuous operation over wide temperature and pressure
variations, constant volume pulsation free flow, the ability to handle wide viscosity variations, and ease of
inspection and maintenance. Specific limitations are covered in this manual and summarized in Section 11,
Specifications.
To achieve successful operation and maximum life from your pump, make sure that the pump selection and
materials are compatible with the service and operating conditions of your application.