The VVN series liquid ring vacuum pumps are intended for handling air, non-aggressive and inert gases as well as gas-vapor mixtures, preliminary cleaned from mechanical impurities and the most part of the liquid phase. The pumps do not require complete gas treatment off the liquid phase and allow its presence in the pumped gas.
The pump models VVN1-1.5 and 2VVN1-0.8 are manufactured as the monoblock versions close-coupled with the electric motor.
The models VVN1-3-E, VVN1-6-E, VVN1-12-E, 2VVN1-0.8-E are also available as the explosion-proof versions.
The VVN pumps are produced by the leading pump manufacturing companies of HMS Group: HMS Livgidromash (Russia) and Nasosenergomash (Ukraine).
APPLICATION
Pumps of the VVN series are widely applicable in various industries for handling gases and vapors for filtration under vacuum, in degassing systems, vacuum condensers and driers, evaporation, rectification, condensation, crystallization, concentration, sublimation, and other processes.
TECHNICAL DATA
Capacity
up to 19 200 m³/h
Vacuum
up to 60 / 80 А%
Suction pressure
0.02 - 0.04 bar
Operation pressure
200 / 400 millibar (absolute)
Drive power
up to 630 kW
Power supply
220 / 380 / 6 000 V
Materials
Parts
Material options*
Pump Casing
Grey Cast Iron / Steel A352GrLCC, J02503/J02505 / Steel X10CrNiTi18-9 or Steel 321
Casing covers
Impeller
Guide plate
Carbon Steel 1020, S20C and similar / Steel 321 or X10CrNiTi18-9 / Bronze
Shaft
Carbon Steel 1020, S20C and similar / Steel 431 or Х20CrNi72
* Other construction materials are available in accordance with customer requirements. Some limitation in material options may apply.
Design Features & Advantages
1. Casing covers (side lids) are made by casting of grey cast iron or construction steel. The die cast covers made of corrosion-resistant steel are also available as an option.
2. The seal chambers allow installation of both gland seal with expanded graphite packing or single/dual mechanical seal with API 682 piping plans.
3. High-strength guide plates are available in bronze, mild steel or stainless steel versions.
4. The casing is made of cast iron with subsequent machining. The steel welded casings are also available by customer’s request.
5. The impeller is dynamically balanced to ensure low rotor vibration that increases the operational lifetime of bearings and seals.
6. The nozzles flanges can be manufactured in accordance with the requirements of ISO, DIN, ASME, ANSI standards.
7. The pumps are supplied with standard or heavy-duty bearings with at least 100 000 hours operational lifetime. Grease or oil bath lubrication with oil cooler is optionally provided.
8. A rigid high-strength shaft provides minimal vibration and runout to increase operational lifetime of seals and bearings. A stainless steel shaft with a coating and complete isolation from the pumped fluid is optionally provided.
Pumps models VVN1-3-E, VVN1-6-E, VVN1-12-E, 2VVN1-0.8-E are provided in high-grade explosion-proof version accordingly to the Russian state safety standards, with temperature resistance class up to +200 °C.
The equipment is certified for application in explosion hazard zones in accordance with relevant industry requirements approved in the Russian Federation. Other countries may require specific certification procedures or harmonization of the applicable standards.
