The positive displacement technology handles backpressure fluctuations, cavitation and air entrainment.
Pumps & Systems, April 2008In today's upstream and midstream oil and gas environment, screw pumps are playing a larger role in what has traditionally been a centrifugal and reciprocating pump...
Q. Can rotary type pumps be used to pump slurries? If so, should users be aware of any special precautions? A. Rotary pumps may be used to transfer slurries when the application dictates....
Pumps and Systems, July 2009   Within the personal care products industry, changing formulations on a frequent basis to meet marketing requirements can be costly and time consuming in terms...
Q. Must multiple pumps operated in series or parallel be identical in size? A. No, they do not have to be identical. However, pumps intended to operate in series must be close in size regarding...
The Challenge A paint and coatings plant that produces both cationic paste with pigments and cationic binders without pigments for truck shipment to automotive OEMs was experiencing difficulties...
Q.What are “nonclog pumps,” and in what applications are they used? Figure 1. Dry pit pump – overhung flexibly coupled vertical end suction A. “Nonclog pumps” are rotodynamic...
Prepare for the 4th Edition of API 682
This comprehensive international standard for mechanical seal and system use has many important changes.After more than five years of planning, the American Petroleum Institute (API) is preparing to...
Q. What are some ways to monitor the power used by a rotary pump? A. Instrumentation and systems can be used, such as: Torque meter—The most direct way to monitor power is a torque meter with...
Q. We recently purchased several magnetically driven rotary pumps for our process and want to know if we need to be aware of any special operational considerations. A. The operation of magnetically...
Q. What information is available regarding bearing minimum loads for pumps? A. All rolling element bearings require a minimum applied load. This ensures that normal elasto-hydrodynamic operation...
Metering Pump Application and SelectionA wide range of metering pumps has been developed to fit the diverse applications in process engineering. Before selecting a metering pump, consider the...
By most definitions, metering pumps handle small or low flow volumes that are precisely dispensed at pre-set intervals. Most metering pumps, however, need to vary flows either manually or through some...
Without question, liquid storage terminals play an integral part in the ongoing success and relevance of a wide array of industries worldwide. They serve a vital role in the global economy as transfer...
Pumps & Systems, June 2008The rotary lobe pump belongs to the positive displacement pump family. It is a dual shaft pump design with external timing gears, allowing two intermeshing rotors to...
Pumps and Systems, March 2009When you think about it, getting people and businesses to acknowledge the benefits of increasing energy efficiency is an easy sell. Are there any people or companies...
For the non-expert in pump technology, selecting the most appropriate pump technology for a specific application or process system can be challenging because many of today's pumps are so...
Transporting crude oil has always presented unique fluid-handling challenges. For example, pipelines often traverse remote territory in harsh environments, so they require pumping solutions capable of...
Technical professionals understand a variety of fluid-transfer performance concepts. The principles have much to do with evaluating if an individual pump will succeed in accomplishing its...
A power company in the Atlanta, Ga., area wanted to replace its older, coal-fired electric generating units with gas turbine, combined cycle technology to reduce nitrogen oxide (NOx), sulfur dioxide...
High energy prices pose an unprecedented profit-robbing threat to every manufacturing operation, large or small. Left unmanaged and unchecked, rising energy expenditures can erode a company's...
Pumps & Systems, April 2008Called the "fastest-growing alternative fuel" in the United States by the Department of Energy, biodiesel continues to play an increasingly significant role in the...
Multiple screw pump performance specifications are shown in the table below.Pump TypeFlow Rate GPMPressure Range PSIViscosity Range cStTwin Screw25 - 5,50050 - 1,500Gas - 1,000,000Three Screw1 -...
Hydraulic Institute Pump FAQs February 2010
Q. We have an application for pumps handling hot oil at 700 deg F. What special care should we take in selecting and installing such pumps? A. Pumps for handling oils within the range of 150 deg...
Hydraulic Institute Pump FAQs August 2010
Q. What is the preferred method for starting reciprocating power pumps?A. Starting a reciprocating pump with a closed discharge valve is naturally difficult due to the high torque required to overcome...
Non-Metallic Mag Drive Pumps: Great Equipment for Aggressive Fluids
Non-metallic magnetic driven gear pump technology improves equipment life and maintenance costs for metering and transfer applications.Finding an efficient and economically feasible way to transfer...
Pumps and Sytems, March 2009 Editor's Note: This is the second in a series of five articles based on the Hydraulic Institute's new Positive Displacement (PD) Pumps: Fundamentals, Design and...
Pumps and Systems, July 2009Organizations affected by regulatory requirements to remove lead from pipes, faucets and plumbing fixtures are likely well-down the path of investigating material options...
Hydraulic Institute Pump FAQs June 2011
Q. When purchasing rotodynamic (centrifugal or vertical) pumps, how can we estimate if the efficiency of the proposed design is the best to be expected for our application?A. The Hydraulic Institute...
Executive SummaryWhen assessing the vast chemical industry, it is usually not advisable to deal in generalities. However, as a base for the market's examination, Beth Beloof and Marianne Lines,...