Your benefits

* Cost-effective pumping. The BG pump creates a stableprocess that leads to improved operation of the equipmentupstream of the BG and improves the total output.

* Energy savings. The BG pump runs smoothly and with highefficiency when there is a gas problem. While other pumpswould not function or have a high energy consumption.

* Saving chemicals. Large savings can be realised by using aBG pump, because the need for defoamers or other chemi-cals can be significantly reduced.

* Maintenance savings. BG is part of a Modular System allow-ing for a reduced number of spare parts, simplified serviceand shortened downtimes.

Capacity 40-4000 m/h3

Head 5-100m

Temperature Max. 100°C

Flanges ISO 7005 PN10-PN16

(BS 4504-ANSI 150-JIS 10K-16K)

Lubrication Grease or oil

Specification ISO 5199 ”Technical specification

for centrifugal pumps class II”

BG Degassing Centrifugal Pump

ApplicationsBG degassing pumps are used for pumping stock con-sistencies up to 10% and other liquids with gas contents up to 70%. Ideal for gas handling in the recycled fibre process. Applications include foam from flotation cells and pulper drum pumps.

Design

Where gas is causing an unstable flow in the process, BG is used to create a steady reliable flow. The BG pump is designed to separate gas from the pumped liquid.

The pumps are part of a Modular System, but with a special patended impeller, a special casing cover and a seal cartridge of a new design. The pump has all of the advantages of a Sulzer namely rugged construction, back-pull out design to simplify service and provide high efficiency.

Vacuum systemThe vacuum pump is a specially adapted liquid ring pump in stainless steel, which is capable of handling both water and fibres without damage. Normally, how-ever, there are no fibres in the degassing system.

The vacuum system creates the necessary differential pressure to make the BG-pump run smoothly.

Other vacuum sources than a vacuum pump might also be used.

FunctioningAll pumps are equipped with semi-open impellers. These impellers have back vanes and special passages that make it possible for the gas to escape behind the impel-ler. The gas separated in the pump is transferred through the seal cartridge and is then returned to the storage tank, through the vacuum pump, via a pipe above the level of the liquid.

Properties

50 Hz

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Code 24 27

Pump casing Duplex stainless steel High alloy stainless steel

Casing cover 2324 1.4527

Wear disc Duplex stainless steel High alloy stainless steel

2324 1.4527

Impeller Duplex stainless steel High alloy stainless steel

2324 1.4527

Shaft Duplex stainless steel Duplex stainless steel

2324 2324

Shaft sleeve Duplex stainless steel High alloy stainless steel

2324 1.4539

LELZ 161

ABB 132M

3 4 5

320-1540

320-1040 425-2040

420-1540

430-2540435-3040

440-3548

535-3060530-2560315-0840

550-4060425-2048

550-4060

315-0840

320-1040320-1540

420-1540425-2040

430-2540 435-3040

440-3548

1500 rpm

<1000 rpm

9 20002002010 100 100050 500 l/s

120

500050050

100

50

1000100

10

5 m3/h

m

40 200 2000

20

30

40

www.sulzer.comE10114 en 5.2012 © Sulzer Pumps

This data sheet is a general presentation. It does not provide any warranty or guarantee of any kind. Please, contact us for a description of the warranties and guarantees offered with our products. Directions for use and safety will be given separately. All information herein is subject to change without notice.

Typical installation of a BG pump. No fibre to drain by connecting the vacuum pump outlet to the tank.

Installations

Materials

Bearing assembly sizesPerformance curvesType designations

BG Pump series

4 Bearing assy. size

25 Suction size (cm)

20 Discharge size (cm)

40 Impeller size (cm)

BG 425-2040

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