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flights of the screws and the pump body. The gases are conveyed by
the rotation of the screws to the exhaust, where they are discharged.

The COBRA NW screw vacuum pumps are driven by water-cooled
motors.

Oil circuit

Since the complete operating principle works without contact, no oil
circuit is needed in the work area.

Cooling

The vacuum pump is cooled by

a cooling water circuit (4) in the cylinder and motor. The cooling
water flow is preset at 1 l/min at the factory and can be adjusted
with valve CWR. This cooling water circuit is used to cool the
motor of the pump, the frequency inverter and also the body of
the NW pump.

NOTE

:

 

The

 

COBRA

 

BC

 

vacuum

 

pumps

 

are

 

always

 

delivered

 

without

 

oil

 

and

 

without

 

cooling

 

water.

 

Operation

 

without

 

these

 

coolants

 

can

 

result

 

in

  

damage

 

to

  

the

  

vacuum

  

pump.

Nitrogen system

The nitrogen system performs t

wo

 mai

n functions:

nitrogen is used as sealing gas. The nitrogen is injected between

 

the

transmission and the process gas to achieve good closeness.

 

The

Nitrogen flow used for the sealing is set by two

orifice plates

(

f

).

W

ith

 

a

 

pressure of 1,5 bar, the flow is around 8-10 l/min.

nitrogen is used as dilution gas as an option. It is injected inside the
cylinder which located in middle of screw. Nitrogen flow injected

 

in

the middle hole is preset at 2 - 5 l/ min and can be adjusted with
valve DGR 1 (optional), depending on the application. When flow

 

is

too low a warning then an alarm signal is generated by

 

flowmeter

DGF to the PLC. Status of the pump depends on the

 

alarm function

set  by user (factory setting : None, pump continues

 

running with

an alarm). Dilution improves the screws functioning,

 

especially

when sucking  corrosive gases.

Optional functions/ Use of available
accessories

A temperature sensor mounted on the cylinder, measures the

 

temperature inside the cylinder.

A silencer or sound absorber (accessory) at the exhaust reduces the

 

noise

of the pump and collects any condensate.

A leak-protection non-return valve (optional) at the exhaust traps the

 

condensate in the pump when the pump is switched off.

The LCD controller processes the data of the sensors (see chapter
“Communication with the equipment”) as follows:

discharge pressure

temperature in the cylinder

current

cooling water flow rate

On/ Off button

The vacuum pump is delivered with on/ off button.

Versions

Further vacuum pump descriptions state the nominal displacement and
the design level.

Example: BC 0101 G
BC = standard version
0101 = 100 m

3

/h

G = Design

Safety

Intended use

DEFINITION

: To rule out any misunderstanding, the term “handling”

of the vacuum pump covers transport, storage, installation and
operation of the pump as well as effects on operating states and
troubleshooting on the vacuum pump.

The vacuum pump is intended for industrial use. It may only be
operated by qualified personnel.

The different application possibilities and limit values for operation
described in “Product description” and “Installation requirements”
must be observed by the manufacturer of the system into which the
vacuum pump is to be integrated and by users.

The need for personal safety regulations depends in principle on the
type of use. The operator must provide the users with the necessary
means and must inform his personnel about the dangers emanating
from the processed product.

The operator of the vacuum pump must observe the safety regulations
and must train and instruct his personnel accordingly.

Local regulations regarding the motors and electric control elements
must be observed when installing the pump in potentially explosive
environments.

The maintenance instructions must be followed and observed.

These installation and maintenance instructions must be read and
understood before the vacuum pump is used. If you have any doubts,
contact your Busch representative.

Safety information

The vacuum pump is designed and manufactured in compliance with
the latest technical standards and safety regulations. Nevertheless an
element of residual risk remains.

Various safety instructions are to be found in this handbook and on the
pump. These instructions must be followed. You can recognise these
instructions by the signal words DANGER, WARNING and CAUTION,
which are defined as follows:

DANGER

Disregard of this safety note will always lead to accidents with po-
tentially fatal injuries and serious damages.

WARNING

Disregard of this safety note may lead to accidents with potentially
fatal injuries and serious damages.

CAUTION

Disregard of this safety note will always lead to accidents with minor
injuries and damages to property.

Noise emission

Refer to the table “Technical data” for the permissible noise level in
free field conditions according to EN ISO 2151.

CAUTION

The intensity of the noise of the vacuum pump is higher within a
certain area of the pump.

Risk of hearing damage.

Users must wear ear protection when spending a longer period of
time in the vicinity of a non-insulated vacuum pump.

BC 0101 G

Safety

0870704904 (En)

Page 5

Содержание COBRA BC 0101 G

Страница 1: ...0870704904 0004_en Original instructions Modi cations reserved 20 10 2021 Instruction Manual COBRA Screw Vacuum Pumps BC 0101 G Get technical data instruction manuals service kits...

Страница 2: ...e system 13 Switching the system off 13 Maintenance 13 Maintenance program 14 Weekly 14 Monthly 14 Yearly 14 Every 16 000 hours of operation at the latest after 4 years 14 Lock Out Tag Out procedure 1...

Страница 3: ...control Interface CWC Cooling water connections TIC Tool interface connection HC Handpad connection EB Eye bolts CP PLC box PB Start Stop button PL Power led ES Warning Alarm led OSG Oil sight glass...

Страница 4: ...erned the vacuum pump is suitable for evacuation of a 300 liters tank The vacuum pump is not suitable for continuous duty at a pressure more or equal than 150 hPa mbar Caution the operating cycle of 1...

Страница 5: ...d the design level Example BC 0101 G BC standard version 0101 100 m3 h G Design Safety Intended use DEFINITION To rule out any misunderstanding the term handling of the vacuum pump covers transport st...

Страница 6: ...wer supply l Switch off the water quick connections inlet first then outlet l Put the label or warning board Maintenance processing on or next to the pump Safety Lockout procedure l Take off the label...

Страница 7: ...rs and corresponding actions Without this form duly completed and signed by a legally responsible person the pump should not be disassembled l Proceed to disassembly of the vacuum pump Please make sur...

Страница 8: ...cuum pump is equipped with accessories that could influence the centre of gravity this must be taken into account when lifting and a belt must additionally be attached to a specific point l Fasten the...

Страница 9: ...n and start up Necessary installation instructions CAUTION If the necessary installation instructions are not followed and particularly in the case of inadequate cooling Risk of damage to and total de...

Страница 10: ...e case of long intake lines the line cross section should be larger than the intake flange to prevent a drop in the performance of the vacuum pump If you have any doubts contact your Busch representat...

Страница 11: ...OBRA BC 0101 G vacuum pumps are always delivered without oil see the chapter Oil types for information on the recommended oils l Prepare the quantity of oil specified in the table Oil quantity Oil fil...

Страница 12: ...owmeter must be connected in such a way that switching on leads to an alarm and stopping of the vacuum pump when the flow drops below 0 3 l min Saving the operating parameters As soon as the vacuum pu...

Страница 13: ...if the pump is shut down for a longer period of time Drain the cooling water u Pull off the connections for the inlet and outlet of the cooling water u Drain the cooling water completely u If necessa...

Страница 14: ...u Make sure that the operating room is clean and free of dust clean if necessary l Make sure that the vacuum pump has been switched off and that it cannot be switched on again accidentally l Check the...

Страница 15: ...s also a danger to the environment Wear protective clothing when replacing contaminated oil Contaminated oil must be treated specially and must be disposed of according to applicable regulations Drain...

Страница 16: ...collect it in a container l Dispose of the condensate according to applicable environmental protection regulations l Check the sound absorber regularly and clean it if necessary Checking the leak pro...

Страница 17: ...tamination must be documented in a declaration of decontamination Declaration of Decontamina tion which can be downloaded from www buschvacuum com Dispose of the used oil and condensate according to a...

Страница 18: ...ntaminated or polluted oil can lead to hazardous pump conditions which could cause personal injury Oil quantity The quantity of oil specified in the following table is of informative nature only Check...

Страница 19: ...er pressure bar 2 5 Cooling water temperature C 10 25 Weight approx kg 117 Technical data BC0101G NW 0090 A Nominal suction capacity m3 h cfm 90 53 Ultimate pressure hPa mbar mTorr 0 01 7 5 Nominal mo...

Страница 20: ...Safety of machinery Basic concepts general principles of design EN ISO 13857 2019 Safety of machinery Safety distances to prevent hazard zones being reached by the upper and lower limbs EN 1012 1 201...

Страница 21: ...Basic concepts general principles of design Risk assess ment and risk reduction BS EN ISO 13857 2019 Safety of machinery Safety distances to prevent hazard zones being reached by the upper and lower l...

Страница 22: ...Note...

Страница 23: ...Note...

Страница 24: ...Italy info busch it Japan info busch co jp Korea busch busch co kr Malaysia busch busch com my Mexico info busch com mx Netherlands info busch nl New Zealand sales busch co nz Norway post busch no Per...

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