February 2011
RMI/RMA
PRESS RELEASE
Richter Chemie-Technik, Germany : Plastic-lined magnetic drive pump RMI and RMA
Magnetic drive pump for medium-duty process applications in
ISO/DIN and ASME/ANSI design
Richter Chemie-Technik is known as the 1st choice in the process industry with its plastic-lined
magnetic drive process pumps for conveying corrosive, environmentally critical and high-purity
fluids, especially with high pressure and temperature requirements and large flow volumes.
Operators' requirements now tend to lie in the medium to low range for many of the new and
expanded fields of application. As a consequence, Richter Chemie-Technik has developed
magnetic drive pumps whose design is tailored to this medium range of requirements.
The company launched the plastic-lined magnetic drive process pump RMA in ASME/ANSI
design in 2009, available from 1.5 x 1 x6” to 3 x 2 x 10”. It is now being followed by the
ISO/DIN version RMI: The sealless magnetic drive pump with a fluoroplastic lining is available
in eight sizes from 40-25-125 to 80-50-200 as a frame-mounted and close-coupled pump.
These mag-drive pumps impress with their pure PFA lining without carbon fillers – this is a topquality lining with a uniform thickness of 3 to 5 mm, which is anchored vacuum-proof. This
material offers very high chemical resistance, temperature resistance up to 150°C, full FDA
conformity as well as inertness versus pure fluids. Another feature is the outstanding
permeation resistance of PFA. Whereas the housing and impeller/magnet assembly are lined
with pure PFA, pure PTFE is used for the wetted part of the dual can made of carbon-fibrereinforced plastic.
The basic safety features of a plastic-lined magnetic drive process pump from Richter were
naturally retained. For example, plain bearings of the design “SAFEGLIDE® PLUS” made of
silicon carbide (SSiC) are used: they offer protection against dry running for 30 to 60 min.
Moreover, the pump surface is designed to be very wear-resistant thanks to external corrosion
protection (epoxy coating).
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February 2011
RMI/RMA
The full-surface ductile cast iron shell according to EN-JS 1049/ ASTM A395 absorbs
pipework forces and eliminates the need for expansion joints. In the event of rolling bearing
failure, a thrust ring protects the can against damage from a possibly tumbling drive magnet
assembly
The properties of the magnetic drive pump RMI, at a glance:
 The entire pump is FDA-compliant
 Minimum life-cycle costs and very easy maintenance (double back-pull-out design
facilitates maintenance work on the motor and rolling bearings without releasing the system
pressure)
 Designed with high efficiency (high-performance permanent magnets made of neodymiumiron-boron and samarium-cobalt; these guarantee a constant magnetic energy density even
at high operating temperatures; patented magnet attachment underneath the PFA lining)
 The can is eddy-current-free – as a result, no heating of the fluid and no energy waste
(metal-free dual can system, made of thick-walled, pure PTFE on the wetted side; the
discharge side has a carbon-fibre-reinforced plastic with high safety reserves)
 Flexibility with regard to the fluids thanks to universal corrosion resistance and high-quality
external corrosion protection
 The solids restriction rings in the housing and magnet assembly prevent the ingress of
particles into the can area, permitting the conveyance of solids-containing fluids
 Split impeller/magnet assembly design minimises the variety of parts and therefore the
volume kept in stock.
 Flow capacity
o

Delivery head
o

up to 360 ft (110 m) at 50 Hz
Pressure
o

up to 660 USgpm (150 m3/h) at 50 Hz
up to 290 psi (20 bar)
Temperature range
o
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-30°C (-20°F) up to 150°C (300°F) in plants acc. to ISO standards
February 2011
RMI/RMA
Conclusion: These pumps are a genuine alternative to pumps made of expensive, long-leadtime metals (e.g. Hastelloy®, tantalum etc.), full plastic pumps, plastic-lined mechanical seal
pumps, metallic pumps with double mechanical seals and a liquid sealing or quenching system
as well as stainless steel magnetic drive pumps.
The Richter series RMI and RMA were developed as an economical-priced alternative to these
conventional solutions. With an intentionally reduced range of options and accessories, they
are designed for lighter to medium-duty applications in the chemical, pharmaceutical and
petrochemical, semiconductor, pulp, metal, food processing and waste disposal/recycling
industries. Thanks to its service-friendly design, its good hydraulics and the overall good value
for money with low life-cycle costs, the RMI and the RMA are maybe the most economical
magnetic drive pumps on the market.
Fig. 1: The new plastic-lined magnetic drive pumps series RMI/RMA for medium-duty process applications
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February 2011
RMI/RMA
If the performances of the RMI/RMA are insufficient Richter is able to deliver lined process
pumps with flow rates up to 2650 USgpm (600m3/hr) with its pump series MNK/MNKA. So
Richter is capable of delivering a suitable plastic-lined pump for all kind of applications.
Contact:
Richter Chemie-Technik , Germany,
Mr. Lutz Rosin, tel. +49 (0) 2152/146-136,
e-mail: lrosin@idexcorp.com
Website : www.richter-ct.com
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