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Vacuum blocks ELMO-BV

 

1. GENERAL INFORMATION

Preliminary rarefaction blocks named ELMO-BV vacuum blocks made on the base of vacuum pumps with the closed lubrication loop. Vacuum pumps are rotary blade fan centrifugal pumps with a rotor on roller bearing, a flange electric motor and automatic lube system. Vacuum pumps have low mass, sizes and power consumption.
ELMO-BV blocks have a reliable mechanical construction and simple technical service. They are noiseless, with the low level of vibration and air-cooling.
ELMO-BV blocks are intended for exploitation in the wide temperature range of environment and adapted for round-the-clock work.
ELMO-BV vacuum blocks are in use in flowsheets, being all-sufficient equipment and can be used as vacuum pumps of the preliminary rarefaction coupled with Roots type vacuum pumps incorporating two-lobed rotors.
 

2. PURPOSE

 
ELMO-BV vacuum blocks are intended for vacuum degassing tanks of power transformers in voltage range from 110 to 1150 kV, which withstand residual pressure 50 Pa (0,5 mm of mercury column), during installation and repair of them.
Using ELMO-BV vacuum blocks for transformers’ tanks which don’t withstand residual pressure 50 Pа is possible after strengthening of them in legal agreement with their plant-manufacturer.
 

3. SPECIFICATION

 
Parameter
unit
ELMO-BV-100
ELMO-BV-150
ELMO-BV-180
Capacity

 м3/h

l/s

 360

100.0

530

147.0

630

175.0

Residual pressure

mbar

Pa

 0,5

50

 0,5

50

0,5

50

Supply voltage

 V

 400-690

400-690

400-690

Installed capacity

 kW

 7.5

11.0

15.0

Frequency

 Hz

 50

50

50

Rotation speed

 min-1

 1450

 1450

1450

Noise level

dB

 76

77

78

Sucker diameter

 inch

mm

 2

50

3

75

3

75

Exhaust pipe diameter

 inch

mm

 2

50

3

75

3

75

Amount of oil in the system

 l

 6

 12

12

Length

 mm

 1500

2000

2000

Width

 mm

 900

1100

1100

Height

 mm

 1100

740

740

Weight

 kg

 420

 800

850

 

4. CONSTRUCTION

 
ELMO-BV vacuum blocks are made in a protective metallic container with removable wheels allowing moving blocks on hard even surfaces easily.
There are 4 ring-bolt placed on the top for loading and unloading by a crane and 2 slots in the bottom for an autoloader's work. 
 
         suction line with a valve and protective filter are placed on the left above;
         air-cooled vacuum pump is placed on the left below;
         control panel is placed on the right above.