Our Product
Nash
Liquid Ring
Vacuum Pump Series
THE ADVANTAGES OF A NASH LIQUID RING VACUUM PUMP
- ACCEPTS CARRYOVER
Soft solids, Moisture, slugs, Chemicals, etc, will not harm the pump. These impurities will simply be washed out through the pump discharge. -
COOL & QUIET OPERATION
The pump runs cool owing to the circulation of the sealing water inside the pump. The operation is also relatively quiet – not exceeding 85 dBA - CONSTANT OPERATION FOR ANY VACUUM LEVEL
Our pumps can operate constantly and continuously at any
vacuum level – from 29” HG Vac. to atmospheric pressure. - EASY MAINTENANCE
NASH pump has few parts and only one moving part. Therefore wear is less and thus maintenance is simpler and cheaper. - LONGER PUMP LIFE
Generally, a NASH pump has a longer life span, mainly due to its robust construction and because the NASH pump has only one moving part, the rotor, which is mounted on a shaft supported by a set of bearings designed for a B-10 service life of 20 years continuous operation. - ENVIRONMENTALLY FRIENDLY
The NASH pump does not require any oil-change, filters, oil-pans, condensers etc. Plant rooms run clean, free of oil contamination and oil discharge to sewers.
How Liquid Ring Vacuum Pumps Work
Liquid ring vacuum pumps are rotating positive displacement machines providing process vacuum in industrial applications such as chemical, electrical power, environmental, food & beverage processing and packaging, marine, mining, oil & gas, pharmaceutical, pulp & paper, and textiles. Liquid ring vacuum pumps utilize water or other processes compatible liquid as the sealant. The simple operation, with no contacting parts, make liquid ring vacuum pumps a safe and reliable choice for handling dirty and potentially dangerous gas streams. Liquid ring pumps are available in single and dual stage designs and also configured as compressors for even more versatility.
Principle Of Operation
The seal liquid forms the ring inside a pump body as the impeller spins creating small chambers for gas to be trapped. The axis of the rotor is eccentric from the body allowing the liquid to almost fill, and then almost empty each rotor chamber during a single revolution, forming the compression of the gas for the pumping action. Vacuum inlet and atmospheric discharge ports provide flow paths for the gas mixture being handled. The heat of compression of the gas is dissipated into the seal liquid, and some of the liquid flows out to discharge. The exhaust gas and residual water discharge is separated from the gas stream and directed to the house exhaust and returned to the pump respectively. Seal fluid is replaced by a constant flow of cooler seal fluid.
Watch This Video To Learn “How It Works”
SMALL CAPACITY PUMPS
(Vacuum levels up to 29in. HgA, 1.5 HP to 10 HP)
NASH small capacity liquid ring vacuum pumps feature monoblock or lantern designs. These designs deliver the benefits of a simple, compact, and economical installation. Our small capacity liquid ring pumps are available in a variety of materials including cast iron and stainless steel and are ideal for use in a vast range of general industrial processes.
MEDIUM CAPACITY PUMPS
(Vacuum levels up to 28in. HgA, 10 HP to 200 HP)
NASH medium capacity liquid ring vacuum pumps offer a highly powerful range of small to medium size single stage vacuum pumps for use in diverse industries including oil & gas, general industrial, and chemical.
Available in cast iron for less aggressive applications, and stainless steel for hostile applications and environments.
LARGE CAPACITY PUMPS
(Vacuum levels up to 25in. HgA, above 200 HP)
NASH medium to large capacity single stage vacuum pumps are ideal for demanding applications in extremely tough conditions. These heavy-duty pumps are able to serve a wide range of applications, which can typically include dewatering in the paper industry and vacuum filtering in mineral ore processing. Our large capacity pumps are available in a variety of materials including stainless steel, cast iron with some models featuring a polyisoprene lining.
TWO STAGE LIQUID RING VACUUM PUMPS
(Vacuum levels to 0.8in. Hg abs.)
NASH two stage liquid ring vacuum pumps are ideal for a variety of industrial applications and may be combined with ejectors or boosters to form hybrid packages, allowing higher vacuum levels. Nash offers TC two stage liquid ring vacuum pumps, available in ductile iron and stainless steel, and the AT two stage liquid ring vacuum pumps, available in cast iron. Both the TC and AT two stage vacuum pumps feature NASH conical porting.