|
|
Rotary Liquid Ring Pump
|
| |
| |
 |
Design and Construction
|
|
| |
|
The PVI liquid ring pumps are constructed of two main parts: rotor (shaft and impeller) and casing (cylinder and cylinder head), which in spite of their simple mechanisms offer high quality of performance.
|
PVI-T502 Ù
|
|
The material used in the pumps are of high quality and the parts are manufactured under the ISO and DIN standards with accepted tolerances of 100th of a millimeter. This accuracy leads to a minimum internal leakage and a maximum pump efficiency. Pumps' rotors are dynamically balanced with computerized devices which leads to elimination of dynamic vibrations.
|
|
Each pump is fully tested for its capacity, pressure, vacuum operation, power consumption and other measures of performance. All parts are 100% quality controlled by our QC department.
|
| |
|
Operating Mechanism
|
|
| |
 |
The vaned impeller rotates around the pump axis of rotation in an eccentric fashion. The liquid (usually water) is fed into the pump cylinder and, by centrifugal acceleration, forms a moving cylindrical ring against the casing.
|
|
The liquid ring creates seals between impeller vanes and the two sides of the cylinder. The eccentric rotation of the impeller causes cyclic variations of the volume enclosed by the impeller vanes and the ring. Air or gas/vapor is input to the pump via the inlet port. It is trapped in the compression chambers formed between the vanes and the liquid ring. Due to the reduction in the volume of these compression chambers which is a result of the eccentric rotation of the impeller, air or gas/vapor is compressed and discharged through the outlet port of the pump.
|
|
Cooling of the pump is done by the liquid (normally water). A fresh supply of liquid can be fed into the pump continuously or it can be cooled after discharge and fed back into the pump. The former method is more environment friendly since there is no waste of liquid (closed-loop).
|
| |
|
Types of Liquid Ring Pumps
|
|
| |
|
PVI liquid ring vacuum pumps are manufactured in two different types: one stage and two stage. They can be used as vacuum pumps or air/gas compressors. For information about models' naming designation, please refer to this link.
|
|
|
PVI-T202 Ù
|
|
|
PVI-1500 Ù
|
|
For information about operating conditions in which the technical specifications are obtained plus other explanations, please refer to this page.
|
| |
|
Advantages of PVI Liquid Ring Pumps
|
|
| |
- Reduced water consumption
- Reduced power consumption
- Operating with no vibration and reduced noise level
- Capability of simultaneous transfer of gas and liquid
- Low service and maintenance costs
- 1 year of warranty and 15 years of after sales services
- Oil-free operation
- Easy installation without the need to use additional equipment even in large models
- Based on the latest technology of manufacturing liquid ring pumps
|
- Increasing the speed of reaching the maximum suction pressure
- Increased suction pressure (up to 99 % for oil packages)
- Ability to reach an absolute vacuum pressure of 0.01 mbar (in combination with rotary pumps)
- Designed for heavy-duty and non-stop operation
- Using mechanical seals for two stage models (for one stage type, they can be installed upon customer request)
- Contact and friction less operation of internal parts, hence an increase in mechanical efficiency and lifetime of the machine
|
| |
|
Applications
|
|
| |
|
PVI liquid ring pumps can be used as vacuum pumps or air/gas compressors. Liquid ring pump packages (with oil or water as the liquid) can also be used as closed-loop systems. For information about each type of application, please refer to the corresponding page found below:
|
|
Vacuum Pump
|
Air/Gas Compressor
|
Oil/Water Package Unit
|
|
|
|
|