Nash Liquid Ring Vacuum Pumps - Sizing Up The Device's CapabilitiesNash liquid ring vacuum pumps are designed to operate in wet environments. These products are manufactured by Gardner Denver Inc. and are known for their low maintenance. They come in various models and are equipped with multiple features and perform several functions. Before highlighting several Nash liquid ring vacuum pumps, let's look first at how a liquid ring pump works. How a liquid ring pump works These devices compress gas through a vaned impeller which rotates within. The device forms a moving cylindrical ring within a casing through centrifugal acceleration whenever liquid is put into the pump. The liquid ring then produces seals between the impeller vanes which results in the formation of compression chambers where gas is trapped. One important aspect that manufacturers of liquid ring pumps take into account is the proper sizing of the devices. To size a liquid ring vacuum pump, manufacturers take note of some information, including mass flow rate, inlet temperature and pressure, discharge pressure and the temperature of the seal fluid. Vapor pressure and seal fluid data are also part of the sizing requirements for these pumps. Vacuum pumps from Nash Nash liquid ring systems are offered in various models. One of these is the Vectra GL/XL. This device is used in industrial operations and features internal seals and gas scavenging. The Vectra is available in ductile iron or stainless steel and is offered in various shaft sealing options. Another model from the Nash brand is the P2620. This pump is designed to cope with demanding industrial operations, including those used in the paper, mining and chemical industries. The model is protected from corrosion by a polyisoprene body coating. For condensing process vapors, Nash has the TC/TCM two-stage models. These pumps are said to be highly reliable and have the ability to attain vacuum levels of down to 8" HgA. According to the manufacturer, this translates to an absolute pressure of around 40 percent lower than a single stage pump. For plastics industries and medical technology uses, the Nash 2BV7 monoblock pump is the one recommended by the manufacturer. This liquid ring pump is touted as having a high vacuum capability and extra water handling ability. The mini size also makes it easy to use. Nash liquid ring vacuum pumps are available for use in different industries and scientific applications. Models are designed with various features and functions and in varying sizes. For a reliable liquid ring device, Nash might be a name worth the attention of consumers. |