Pumps come in a wide variety of types, offering different technical features to suit many different uses. But which type is best for your application? Design Solutions takes a look at a few of the latest pump products

When it comes to selecting a pump for an application, there are many to choose from. But selecting the right pump depends on a number of factors.

Recently, Michael Smith Engineers introduced a pump for high precision liquid transfer. Micropump is a range of ultra-compact external gear pumps covering flow rates from 8.5ml/min to 40lit/min at maximum discharge pressures between 5.2 and 8.5bar depending on the model and fluid.

There are nine series of pumps in the range, and with the options available users are able to specify a pump tailored to their application. There is also a choice of metallurgies including stainless steel and Hastelloy, and a number of gear materials can be specified to suit the liquid being pumped and/or the duty parameters. Of additional benefit, all pumps have magnet drives, eliminating the risk of process fluids leaking; and the external gear design provides a smooth, pulse-free and accurate output, ensuring even and constant distribution of the process liquid.

Applications for these have so far included dosing additives to animal feed to prevent contamination and infection, transferring liquids in specialist fuel cell development prototype work, and pumping for diesel exhaust fluid into exhaust gases to reduce nitrous oxide from diesel generators.

Designed to deliver accurate and constant volumes of different liquids are Becktech’s Componenti Series 63 clam shell peristaltic pumps. These self-priming devices eliminate both pump and fluid contamination by separating pumped liquids from all mechanical elements of the pump.

The pumps are resistant to

a range of chemical products and are available with hosing in silicone or Santoprene for food applications, or Tygon or Viton for industrial use. Furthermore, they can run dry and come in 12/24V DC and 117/230V AC ranges, offering variable output flow range.

The DC models also offer reversible rotation. Additional features include three-roller fixed or sprung pump heads to match user flow and precision needs, and a clam shell opening for rapid tube replacement with internal hose guides to avoid tube pinching.

According to the company, these pumps are suitable for use in hot beverage and drink dispensers, ‘bag-in-box’ applications, and in the food industry and industrial dosing equipment.

Pump solutions

Edwards, meanwhile, has launched a range of dry scroll vacuum pumps for use in scientific, laboratory, research and development applications.

The nXDS is an environmentally friendly oil-free vacuum pump with no lubricants in the vacuum. With its advanced scroll design and tip seal technology, it has a longer lifetime, the company explains.

Intelligent control functions are also featured, with control modes including serial, USB, remote parallel and analogue, as well as manual operation with simple up/down buttons. Full serial communications mode provides feedback about the state of the pump and assists with preventative maintenance regimes. Additional features of the nXDS include easy installation and running, low acoustic noise of 52dB(A) and a standby mode which reduces power consumption.

In the range, users can choose from four sizes to best suit their pumping requirements: the nXDS6i, nXDS10i, nXDS15i and nXDS20i which offer pumping speeds between 6m3hr-1 and 20m3hr-1. Applications include beam lines and high energy physics, backing turbo molecular pumps, distillation, extraction and filtration, scanning electron microscopes, etc.

Xylem, meanwhile, has introduced the compact Flojet LF Plus series of low flow industrial motor driven diaphragm pumps. These, explains the company, have a new design that reduces diaphragm cleaning time by up to 40% and weigh just 20oz.

The pumps are suitable for applications throughout the industrial, agricultural, automotive and food processing industries. Their reciprocating diaphragm technology means the pumps perform optimally in harsh environments – from agricultural misting and tree top boom spraying to chemical washdown for aircraft and automotive use, in addition to many applications for filtration, cooling, liquid dispensing, food processing, pressure boosting, and automotive diesel fluid transfer.

Features of these pumps include quick disconnect ports, flexible mounting feet, an inline fuse, and a manual on/off switch. Furthermore, the pumps are capable of attaining operating pressures of up to 40psi (2.75bar), have self-priming capabilities up to 1.8m and dependable dry-run capabilities. The pumps also offer a 1.0GPM (3.8LPM) flow rate, and have a one-piece welded pressure switch design to keep reliability in and the elements out, states the company.

Michael Smith Engineers