Whether in medical technology, environmental protection/analysis,
in the laboratory or process engineering, many applications are today unthinkable without
the use of mechanically driven diaphragm pumps for gases. Their particular properties such
as oil-free, maintenance-free and uncontaminated operation make them suitable for numerous
fields of application. Despite their wide distribution, they are treated only marginally,
if at all, in the general literature and, up until now, there has been neither a general
account nor a comprehensive summary account of these pumps.
The intention of this book is to fill this gap and provide an overview of the diaphragm
pumps with mechanical drive. In addition, examples of applications and advice concerning
selection of the right pump are included in the subject matter.
This book will serve to inform and stimulate both the engineer constructively working on
design plans, and the engineer undergoing training.
Read the Table of Contents HERE.
by Roland Anderson, Laboratory Products Manager, KNF Neuberger, Inc.
The demand for a reliable vacuum source has led to several different
vacuum pump solutions. Many large industrial and academic labs traditionally use a centrally
located house vacuum system. House vacuums normally consist of a large, powerful vacuum pump
designed to distribute vacuum throughout the facility using an installed piping network. Others
use water aspirators and oil-sealed vacuum pumps.
Where gases with high moisture content must be evacuated during vacuum
drying operations, condensate may collect in the vacuum pump head. Consequently, the pump
may not perform properly and may take more time to evacuate the designated volume.
Read how KNF's
new, self-cleaning PowerDry® models clear moisture from the pump head to dramatically
increase pump efficiency.
Diaphragm pumps can be used for the transfer and dosing of liquids in many
different applications. This article concentrates on fast running diaphragm
liquid pumps. It describes the operating principle, construction and
characteristics of these pumps and shows the technical advantages. Read about the use of such pumps in laboratory equipment.
The possible uses of the pressure control valve are widely varied and well established. It can be used in two possible ways depending on the application. Maintain constant back pressure for exact flow rates under free flow conditions, with positive pressure on the inlet side or with varying back pressure, or with the operation under vacuum, or serve as a safety device for protection of the pump, motor, pipework, vessels and other accessories. Installed as a bypass valve, it prevents damage from excessive pressure build up in the system caused by dirt, misuse or other problems.
A number of technological breakthroughs in fluid-handling pumping
systems have occurred over the past ten years, including better materials,
advanced controls, and more efficient constructions, giving engineers more
design flexibility than ever before. This article gives you a brief
introduction to the many design choices now available to you while designing
your system.
by Eric Pepe and George Halfinger, KNF
Neuberger, Inc.
The positive displacement metering pump is generally the first choice for providing
precise and repeatable flow in many medical device fluid dispensing applications.
Understanding the full range of established and newer metering pump technologies available
allows for the selection of the best metering pump to meet your fluid handling needs.
To achieve the highest possible safety in service, pumps employed in the chemical
industry must be gas-tight, chemically resistant and maintenance-free. To avoid unwelcome
chemical reactions and to maintain the purity of the gases, contamination by the pumping
process must be prevented. Read how KNF overcame the many design challenges
presented by using PTFE materials.
It’s the kind of scenario that makes engineers and medical device designers
cringe. You’ve finished designing a $50,000 blood analyzer and, with 50 units in the
field, you’re already moving on to your next project. Then the news comes in.....
This article shows the importance of the designer communicating with
his pump supplier early in the design process.
While a pump often is the heart of pollution equipment and devices that use pumps,
clear guidelines highlighting key criteria for selecting an appropriate pump have been
seriously lacking. For pollution equipment designers and manufacturers, this situation can
lead to disastrous product failures product failure; for end-users, it can be the
difference between purchasing equipment that provides reliable data acquisition and
durable performance, equipment that fails short of the mark. Read how a pump
should be considered as a sub system, not as a standard commodity.
Compressors and vacuum pumps are the heart of many medical devices, such as
diagnostic equipment, oxygen generators, aspirators, and nebulizers. Unlike many other
applications, however, the special requirements of medical OEM’s demand more than
simply a pump with the correct flow rate and pressure level.
High quality and long life required from medical equipment are pushing advances in
compressor and vacuum pump technology. Too often, standard products
are purchased too late in the design process to meet the complex, dynamic
needs of a system. The author explains how a modified design, that will more
closely meet specific system needs, should be investigated.
by Werner Trares of Freudenberg
Spezialdichtungsprodukte KG and Erwin Hauser of KNF Neuberger GmbH
Diaphragm pumps for gas and vapor
have had a place in the analysis, medical, and process engineering markets, as well as in
the laboratory. They can deliver media uncontaminated, have high gas tightness, and can be
designed so that the parts coming in contact with the media are chemically resistant.
Depending on the diaphragm type used, the properties and applications of these pumps can
vary in considerable detail. This article explains the three basic designs of diaphragm in use today;
the
flat diaphragm, the molded diaphragm, and the structured diaphragm, and the
proper application of each.
KNF's patented structured diaphragm has made it possible to
significantly reduce the size for a given performance. Diaphragm pumps for compressing and
evaluating gases can be classified by the type of diaphragm they employ. It is the
diaphragm that determines the performance of the pump. The story of KNF Neuberger’s development of
the patented structured diaphragm can only be described as the application of precision design
practices.
Unit
Conversion Tools:
KNF
NEUBERGER, INC. Two Black Forest Road
Trenton, New Jersey 08691-1810
609-890-8600 • Fax 609-890-8323 • site
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