Speck pumpen VH 300, VH 400, VH 500, VH 350, VH 110 Operating Instructions Manual

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions

for Explosion Protection for Liquid Ring Compressors

These supplementary operating instructions are an addendum to the operating instructions. The

operating instructions for the product are to be observed without fail.

ATTENTION

Any warranty claims including claims for damages cease in case of non-observance.

The liquid-ring compressors are suitable for the intended use for operation in an environment prone to
explosion as well as for the conveying of explosive gases and vapour mixtures, which can also contain
hydrogen.

According to Directive 94/9/EC, the compressors conform to the equipment group II and to the following
categories depending on the type series and on the measurement and safety technology:

Outside the compressor:

category according to
EN 13463

The media of the environment at the site of installation belong
according to EN 13463-1 to the

Temperature classes Explosion groups further details

For all type series

2G T1, T2, T3 or T4 IIA or IIB or IIC
2D

maximum surface temperature (cf 3)

Inside the compressor:

category according to
EN 13463

The conveyed media belong
according to EN 13463-1 to the

Temperature classes Explosion groups further details

For all type series

2G T1, T2, T3 or T4 IIA or IIB
2D

maximum surface temperature (cf 3)

Inside the compressor:

category according to
EN 13463
Temperature classes Explosion groups further details

1G T1, T2, T3 or T4 IIA or IIB Medium contains hydrogen

1G T1, T2, T3 or T4 IIA or IIB

The authorizations for the corresponding equipment categories and media apply in each case only in
connection with the measurement-, control- and process-technology necessary for them. The
authorization ceases with a restriction of the functionality of the prescribed safety technology, a modified
operational mode or the non-compliance with the required maintenance procedures. Maintenance work
may only be performed by technically trained personnel.

The conveyed media belong
according to EN 13463-1 to the

for VU 20 to VU 1600, VH 20 to VH 1600 and VZ 110 to VZ 180 only

or

1

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

1 Operating thresholds

Operation as vacuum pump and compressor

Suction pressure p

Compression pressure p

Pressure differential pD - p

S

D

S

Inlet temperature
of the medium to be pumped

Temperature tB
of the operating liquid

Supply pressure pB
of the operating liquid

Temperature tS of the flushing liquid
(double-action slide ring gasket)

Ambient temperature -20°C - +40°C

The minimum allowable pressure on the suction side of the compressor as well as the maximum gas-,
vapour- and liquid-temperatures must make possible a safe distance to the vapour pressure of the
operating liquid independent of the operating liquid and ensure an operation free of cavitation.

33…1000 mbar
absolute

The suction pressure must be greater by at least 20
mbar than the vapour pressure of the operating
liquid discharging on the pressure side. The
minimum suction pressure described by the
manufacturer-characteristic may not be exceeded.

800…2600 mbar
absolute

The maximum compression pressure described by
the manufacturer-characteristic may not be
exceeded.

200…1800 mbar The maximum pressure differential described by

the manufacturer-characteristic may not be
exceeded.

Directive 94/9/EC
max. 60 °C
Directive 98/24/EC
max. 120°C

A maximum temperature of 60° applies for
machines to be employed according to Directive
94/9/EC:
Higher temperatures can only be met per Machine
Directive 98/24/EC.

tB = - 20…110 °C The minimum temperature is to be selected so that

a viscosity of 90 mm²/s is not exceeded.
The maximum temperature is to be selected so that
the vapour pressure of the operating liquid
discharging on the pressure side is at least 20 mbar
less than the suction pressure.

pB = pS +300 mbar
pB = pD…pD +200 mbar

The supply pressure of the operating liquid directly
at the compressor should be at least 300 mbar
above the suction pressure after a maximum of
60 s.
But this may also exceed the compression pressure
maximally by 200 mbar.

tS = - 20…110 °C The minimum temperature is to be selected so that

a viscosity of 90 mm²/s is not exceeded.
The maximum temperature must have a minimum
distance of 10 U to the boiling point of the flushing
liquid under process conditions.

Different operating conditions on request.

2

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

VH VH VH VH VH VH VH VH VH VH VH VH VH VH

VU VU VU VU VU VU VU VU VU VU VU VU

VZ VZ VZ VZ VZ VN VN VN

30 50 110 140 180 95 125 180

[Nm]

[Nm]

Supplementary Operating Instructions for Explosion Protection

2 Motor allocation

The following maximum torques and revolution speeds, depending on the operation as vacuum pump or
compressor, may in no case be exceeded.

Type

20 40 60 110 140 180 300 350 400 500 600 800 1200 1600

M

Vacuum

M

Compressor

n

max

Type

M

Vacuum

M

Compressor

n

max

Type

[Nm]
[Nm]

[min-1] 3600 3600 3600 1800 1800 1800 1800 1800 1800 1800 1800 1200 1200 1200

[Nm]

[Nm]
[min-1] 3600 3600 3600 1800 1800 1800 1800 1800 1800 1200 1200 1200

5,8 9,0 10,3 33 42 60 96 110 121 173 217 481 611 741

10,8 20,2 19,8 68 74 83

20 40 80 140 220 300 450 500 600 800 1200 1600

4,9 7,5 13 40 59 82 114 151 192 364 494 650

6,7 11,7 22 74 157 227 288 375 728 962 1183

M

Vacuum

M

Compressor

n

max

M

Vacuum

C

ompressor

n

[min-1]

max

[min-1] 3600 3600 1800 1800 1800 1800 1800 1800

[Nm]

[Nm]

6,7 10 33 42 60 33 42 60

68 74 83

VI VI VI VI VI V V/VG V/VG V/VG V/VG V/VG V V Type

2 8 15 30 55 6 30 55 95 130 255 330 430

0,5 1,8 2,5 5 10 33 42 60 33 42 60 0,5 1,8

1800 3600 3600 3600 3600

1800 1800 1800

1800 1800 1800 1800 3600

See data sheet for further operating data.

The power input designated in the process-specific data sheet for the motor to be used as well as the adjustment of
the protective motor switch is significant. The motor current is to be limited so that the power input is maximally 15%
above that of the data sheet.

3 Temperature limits

With knowledge of the temperature class, the surface temperature of the compressor may exceed the
maximum allowable temperatures in the following table in no operating condition according to EN 13463-

1.
EN 13463-1 Surface temperatures (EN 13463-1)

Temperature class Limit values maximum allowable

for category 1

T 4 135 °C 108 °C 130 °C
T 3 200 °C 160 °C 195 °C
T 2 300 °C 240 °C 290 °C
T 1 450 °C 360 °C 440 °C

maximum allowable

for category 2

If the reference basis for the identification is a certain material, then the surface temperature for
compressors of

Category 1 may reach maximally 80% of the ignition temperature in °C
Category 2 - with ignition temperatures  200°C may reach values at least 5U

- with ignition temperatures > 200°C may reach values at least 10U

below the ignition temperature

3

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Coolant

Supplementary Operating Instructions for Explosion Protection

For dust explosion protection the surface temperature has to be lower than 2/3 of the ignition temperature
in °C of the dust-air-mixture and 75 K below the glow temperature of a dust coat of 5 mm thickness.

4 Identification

The identification of the compressor with the label and the corresponding classification applies only
to the liquid-ring compressor.

Example: II 1G IIB T4 for explosive gas

Example: II 1D T 120° for explosive dusts with a maximum admissible surface

temperature of 120°C

All external equipment and components (coupling, motor, etc.) must at least satisfy the classifications
specified by the manufacturer of the compressor, be suitable for the respective zone and exhibit an
appropriate authorization and identification of the manufacturer of the respective equipment. This is
ensured with acquisition of the complete compressor with drive and control systems.

5 Permissible operating modes

The inert gas flushing is only necessary for
gases and vapors, which contain hydrogen

Inert gas

The inert gas flushing is only necessary for
gases and vapors, which contain hydrogen

Inert gas

LS-

01

TS+

05

Anti-cavitation
protection

FS-

04

UV
13

PS+

06

GO

11

LS-

02

LS-

03

FS-

14



GO

SO+

00

12

UV

14

Overflow

Fresh liquid

LS-

01

TS+

05

Anti-cavitation
protection

FS-

04

UV
13

PS+

06

GO

11

LS-

02

LS-

03

FS-

14



GO

SO+

00

12

UV

14

Overflow

Fresh liquid

Fig. 5.1. open circuit cooling

Fig. 5.2. closed circuit cooling

4

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

open circuit cooling

The removal of the compression output takes place
via the supply of cold fresh liquid. The minimum
temperature of the fresh liquid is to be selected so
that a viscosity of 90 mm²/s is not exceeded.
The maximum temperature is to be selected so that
after the mixture with the circulating liquid the
vapour pressure of the operating liquid discharging
on the pressure side is at least 20 mbar less than
the suction pressure.

closed circuit cooling

The removal of the compression output takes place
in a heat exchanger. The minimum temperature of
the circulating liquid at the outlet of the heat
exchanger is to be selected so that a viscosity of 90
mm²/s is not exceeded.
The maximum temperature at the outlet of the heat
exchanger is selected so that the vapour pressure
of the operating liquid discharging on the pressure
side is at least 20 mbar less than the suction
pressure.
Despite the pressure losses on the product side of
the heat exchanger the operating liquid pressure
directly at the compressor should be at least 300
mbar above the suction pressure.

For the separation of the gas and liquid phase front- or state-mounted separators are to be used according
to the specifications of the manufacturer.

6 Inertisation in the conveying of gases and vapours which contain hydrogen

Before the beginning of the process the rotating liquid-ring compressor is to be flushed with inert gas (for
example, nitrogen) with closed suction valve. The amount of flushing gas must correspond to at least
quintuple the internal volume of the system.

Also, after the end of the process before turning off the compressor flushing is to be done in the same
manner with closed suction valve.

Table 6.1 contains the volume specifications for the determination of nitrogen flushing times for the
system, consisting of a liquid-ring compressor of the type series VH, VU or VZ, a front-mounted separator
or side-mounted separator and the associated piping. This applies only for the front- or side-mounted
separators explicitly named by the Speck firm and piping for the integration in vacuum systems for the
conveying of mixtures, which contain hydrogen.

5

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Type

Volume contents
of the compressor [l] 2 2,4 2,8 8 11 14 18 20 24 32 38 72 94 108
of the piping [l] 0,3 0,4 0,4 1,2 1,7 2,1 2,7 3,0 3,6 4,8 5,7 11 14 16

of the front-mounted
separator
of the side-mounted
separator

5-fold volume
with front-mounted

separator
with side-mounted
separator

VH VH VH VH VH VH VH VH VH VH VH VH VH VH

20 40 60 110 140 180 300 350 400 500 600 800 1200 1600

[l] 3 3 3 17 17 17 33 33 33 62 62 83 83 83

[l] 17 17 30 40 40 40 50 50 50 90 90 110 110 110

[l] 27 29 31 131 148 166 269 280 303 494 529 829 956 1036

[l] 97 99 166 246 263 281 354 365 388 634 669 964 1091 1171

Type

Type

Volume contents [l] 0,3 0,3 1,1 1,4 2,2 2,4 4,8 4,8 5,6 10 14
of the compressor [l]
of the piping [l]

of the front-mounted
separator
of the side-mounted
separator

5-fold volume [l] 95 97 240 252 266 342 394 594 618 918 970 1006

Type

Volume contents
of the compressor [l] 1,8 2 8 11 14 4 4,7 5,8
of the piping [l] 0,3 0,3 1,2 1,7 2,1 1,1 1,4 2,2
of the front-mounted

separator
of the side-mounted
separator

5-fold volume
with front-mounted

separator
with side-mounted
separator

VU VU VU VU VU VU VU VU VU VU VU VU

20 40 80 140 220 300 450 500 600 800 1200 1600

1,8 2 7 9 11 16 24 24 28 64 70 76

[l]

15

3 3 17 21 34 33 39 55 55 83 72 72

17 17 40 40 40 50 50 90 90 110 110 110

[l] 25 27 125 157 236 257 339 419 443 783 780 816

VZ VZ VZ VZ VZ VN VN VN
30 50 110 140 180 95 125 180

[l] 3 3 17 17 17 22 22 22

[l] 17 17 40 40 40 40 40 40

[l] 25 27 131 148 166 136 141 150

[l] 95 97 246 263 281 226 231 240

Type

Volume contents
of the compressor [l] 0,3 0,6 0,9 1,5 2,1 8 11 14 4 4,7 5,2 5,8 0,3 0,6
of the piping [l] 1,2 1,7 2,1 1,7 2,1 1,2 1,7 2,1 1,1 1,4 1,4 2,2 1,2 1,7

of the front-mounted
separator
of the side-mounted
separator

5-fold volume
with front-mounted

separator
with side-mounted
separator

Tab. 6.1 Volumes for systems with front- and side-mounted separator

VI VI VI VI VI V V/VG V/VG V/VG V/VG V/VG V/VG V V

2 8 15 30 55 6 30 55 95 130 155 255 330 430

[l] 1 1,7 2,2 3,5 3,5 17 17 17 22 22 22 22 1 1,7

[l] 2 3,5 4 6 6 40 40 40 40 40 40 40 2 3,5

[l] 13 20 26 34 39 131 148 166 136 141 143 150 13 20

[l] 18 29 35 46 51 246 263 281 226 231 233 240 18 29

6

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

7 Measuring-, Control- and Regulation Technology (MCR)

All MCR-equipment used must be tested and approved for explosion protection according to Directive
94/9/EC. The requirement profile of each individual invigilator as well as the associated control circuit
must correspond to IPL-1 according to EN 13463-6.

• Measuring instruments, which contact the conveying medium : Category 1

• Measuring instruments for the external environment : Category 2

7.1 Required MCR-equipment

TS+

05

Anti ca vitation
protection

Operating liquid pipe
to the pressure casing
(option al)

PS+

06

LS-

02

LS-

03

LS-

01

Operating liquid pipe
to the suction casing

FS-

04

Operating liquid pipe
to the pressure casing
(option al)

Fig. 7.1. MCR at the liquid-ring compressor

With employment of the compressor for the conveying of gases and vapours which contain hydrogen, in
addition to the MCR at the liquid-ring compressor according to Fig. 1 on the site of the installation, the
MCR technology corresponding to the switching diagrams according to Fig. 5.1 and 5.2 is also to be
installed for flushing with inert gas.

7

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

7.1.1 MCR-equipment for compressors of the equipment category 1G (inside) / 2G/D (outside)

comp. Fig. 7.1 When to install:
Motor protection switch (comp. 2) Always
LS- 01 Liquid level switch for clearance to start in the

compressor

If suction- and pressure-casing do not
ever have an appropriate piping to the

separator tank
LS- 02 upper liquid level switch in the separator tank Always
LS- 03 lower liquid level switch in the separator tank If LS- 01 is not installed or the liquid

level in the separator tank fluctuates

significantly.
FS- 04 Flow rate switch in the operating liquid supply of

Always

the compressor

TS+ 05 Temperature switch on the pressure side of the

Always

compressor

PS+ 06 Pressure switch on the pressure side of the

compressor

If the compression via ambient

pressure is not excluded due to use

• For compressors with double-action slide ring gasket, section 7.1.3 is also to be taken into

consideration

• For compressors with magnet coupling, section 7.1.4 is also to be taken into consideration

• With the conveying of gas-vapour mixtures, which contain hydrogen, an inertisation according to

section 7.2.2 is to be taken into consideration

7.1.2 MCR-equipment for compressors of equipment category 2G/D (inside) / 2G/D (outside)

comp. Fig. 7.1 When to install:
Motor protection switch (comp. 2) Always
LS- 02 upper liquid level switch in the separator tank Always
LS- 03 lower liquid level switch in the separator tank If the liquid level in the separator tank

fluctuates significantly.
TS+ 05 Temperature switch on the pressure side of the

Always

compressor

PS+ 06 Pressure switch on the pressure side of the

compressor

If the compression via ambient

pressure is not excluded due to use

• For compressors with double-action slide ring gasket, section 7.1.3 is also to be taken into

consideration

• For compressors with magnet coupling, section 7.1.4 is also to be taken into consideration

7.1.3 MCR-equipment for compressors of equipment category 2G/D (outside)

comp. Fig. 7.1 When to install:
Motor protection switch (comp. 2) Always
FS- 04 Flow rate switch in the operating liquid supply of

Always

the compressor

TS+ 05 Temperature switch on the pressure side of the

Always

compressor

PS+ 06 Pressure switch on the pressure side of the

compressor

If the compression via ambient

pressure is not excluded due to use

• For compressors with double-action slide ring gasket, section 7.1.3 is also to be taken into

consideration

• For compressors with magnet coupling, section 7.1.4 is also to be taken into consideration

8

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Fig. 7.2. MCR for double

-

action slide ring gasket

Supplementary Operating Instructions for Explosion Protection

7.1.4 Additional required MCR-equipment for compressors with double-action slide ring gasket

LS- 07 Liquid level switch for clearance

LS-

07

LS-

07

to start in each collecting tank of
the slide ring gaskets

FS- 08 Flow rate switch in the flushing

pipes of the slide ring gaskets

TS+ 09 Temperature switch in the

refeeding of the flushing liquid

FS-

After the clearance to start by LS- 07 a

08

suitable time lag for the activation of the flow
rate switch FS- 08 must be determined. The
time lag depends on the gasket size and the
viscosity of the sealing liquid. It is between 5 s

TS+

09

and 90 s. (see data sheet).

Additional required MCR-equipment for compressors with magnet coupling

TS+ 10 Temperature switch at the separating can of the compressor

TS+

10

FS-

08

TS+

09

Fig. 7.3. MCR at the liquid-ring compressor with magnet coupling

The temperature at the separating can must be at least 20 U less than the maximum allowed temperature
of the operating liquid.

Liquid-ring compressors with magnet coupling are always to be operated with a soft start!

9

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

7.2 Starting up / Operation / Shutdown

Compressors for the conveying of potentially explosive gas- and vapour-mixtures may initially be put into
operation, if all assembly components corresponding to the requirements of the manufacturer of the
individual components as well as the overall requirements of the compressor manufacturer were installed
and inspected in regard to their operability in detail as well as in the system and are thus fully capable of
functioning in terms of their provision.

7.2.1 General procedural method

• If an explosion danger already exists during the installation of the compressor or if a magnet-coupled

execution is entailed in the installed liquid-ring machine, the inspection in a rotational direction may
not take place under dry conditions. That concerns both the hydraulic area and the sealing areas of
double-action slide ring gaskets.

• A potential equalization for the total system according to EN 50014:2000 section 15 and further

applicable regulations must be ensured.

• The anti-cavitation protection pipe must be installed and be operational.

• Foreign particles from ferrous material may not get under the coupling protection. Danger of spark

formation.

• The operation with closed shut-off equipment in the suction- and pressure-pipes is not permissible.

7.2.2 Sufficient supply with operating liquid

After inspection for the absence of malfunction, the clearance to start by LS- 01 or LS- 02 (comp. Fig. 7.1)
and the start of the liquid-ring compressor, the appropriate time lag is necessary for the activation of the
flow-rate switch FS- 04. The time lag depends on the size of the compressor, the intake pressure and the
viscosity of the operating liquid. It is between 5 s and 90 s.

The volumetric currents of the operating liquid depend on the size of the compressor, the operating liquid
used and the operating parameters. The switching points of the switch FS- 04 are therefore to be
adjusted (see data sheet). The following table shows the switching ranges for water as the operating
liquid with a differential of at least 600 mbar between suction- and operating liquid-pressure.

Compressor-size

Switching point
FS- 04
[l/min]

VH

VU

VZ

VN 95 VN

V 6 V/V

VI 2 VI

8/15

0,5

1,0

to

to

1,0

2,0

20

20

30

G
30

VI
30

3,5
to
5,0

VH

VH

VH

VH

40

60

110

VU

VU 80 VU

40
VZ

VZ

50

V/V
G
55

VI
55

3,5
to
5,0

110

V/V

V/VG

G95

130

6,5

9,0

to

to

10

13,5

140

140
VZ

140

125
V/VG

155

9,0
to
13,5

VH
180

VU
220

VZ
180

VN
180

V/VG
255

9,0
to
13,5

VH

VH

VH

VH

300

350

400

VU

VU

300

V
330

10
to
18

450

V

430

10

10

to

to

18

18

VH

500

600

VU

VU

500

600

12

12

to

to

22

22

VH
800

VU
800

20
to
60

VH
1200

VU
1200

20 to
60

VH
1600

VU
1600

20 to
60

Tab. 7.1 Amounts of operating liquid in the liquid-ring compressors

10

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

7.2.3 Inertisation with the conveying of gases and vapours, which contain hydrogen

The liquid-ring compressor is run by means of an appropriate start-up and rundown procedure so that no
hydrogen-air mixture exists in the standing machine. Before the beginning of the process and before the
stoppage, the compressor is flushed with inert gas.

With malfunctions the compressor is immediately decoupled from the process, flooded with inert gas and
then switched off.

Start-up procedure:

The valves on the process side GO 11 and/or GO 12 (comp. Fig. 5.1/5.2) are closed.
After inspection for the absence of malfunction and the clearance to start by LS- 01 or LS- 02 (comp. Fig.

6.1), an appropriate time lag is necessary for the activation of the flow rate switch FS- 04. The time lag
depends on the size of the compressor, the intake pressure and the viscosity of the operating liquid. It is
between 5 s und 90 s. (see data sheet).

After a failure-free start-up of the liquid-ring compressor the nitrogen-flushing valves UV 13 and/or UV 14
open for a flushing time according to table 6.1. It must be flushed at least with the 5-fold, internal, free
volume of the vacuum system. The clearance occurs with the closing of the nitrogen-flushing valves
UV 13 and/or UV 14. The valves on the process side GO 11 and/or GO 12 can now be opened. The start­up procedure is concluded.

Operation:
With failure-free operation no further activities are required. The liquid-ring compressor is monitored by

the existing monitoring organs.

Rundown procedure:
After the end of the process first the process valves GO 11 and/or GO 12 are closed. While the liquid-ring

compressor continues to run, the nitrogen-flushing valves UV 13 and/or UV 14 open for a preset time.
The flushing time is determined on the basis of the minimum pressure and the minimum quantity of flow.
The flushing time is 5-fold of the free, internal volume of the vacuum system. After the conclusion of the
flushing time the nitrogen valves UV 13 and/or UV 14 close. The liquid-ring compressor is switched off.

Malfunction:
If a malfunction occurs through the activation of one or several monitoring organs, then the process

valves GO 11 and/or GO 12 close immediately. At the same time the nitrogen flushing valves UV 13
and/or UV 14 open for a preset time. For the inertisation, a minimum volume must flow through the
compressor, which corresponds to 5-fold the internal volume of the system. After the flushing procedure
the compressor is to be switched off.

11

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

7.3 MCR flowchart

7.3.1 Category 1G (inside) / 2G/D (outside)

Compressor

operation

ON

Valid for: C

- Compressor with internally flushed
slide ring gasket

- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)

- Constancy of the
liquid level in the separator

ategorie 1G

(i) (a) 2G

LS- 01

ok

yes

LS- 02

ok

yes

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

no

no

no

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

Stop key

activated

Delay of the
flow-rate testing
after switching on

no

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

! Take note of Fig. 7.14 !

Fig. 7.4 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

yes

Shut down

compressor

Compressor

operation

OFF

Compressor

emergency

cut-off

12

! Take note of Fig. 7.15 !

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with internally flushed
slide ring gasket

- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)

-

significant fluctuation of the

liquid level in the separator

ategorie 1G

(i) (a) 2G

no

LS- 01

ok

yes

LS- 02

ok

yes

LS- 03

ok.

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

no

no

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulatio n

no

no

Compressor

emergency

cut-off

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

! Take note of Fig. 7.14 !

TS+ 05

ok

yes

PS+ 06

ok

yes

no

Compressor
in operation

yes

Stop key

no

activated

yes

Shut down

compressor

Compressor

operation

OFF

Fig. 7.5 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

13

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

! Take note of Fig. 7.15 !

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with internally flushed
slide ring gasket

- operating liquid feeding to the
intake and pressure casing
(comp. Fig. 7.1)

ategorie 1G

(i) (a) 2G

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

no

no

LS- 02

ok

yes

LS- 03

ok.

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

no

no

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

Fig. 7.6 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

! Take note of Fig. 7.14 !

Stop key

no

activated

yes

Shut down

compressor

Compressor

operation

OFF

Compressor

emergency

cut-off

! Take note of Fig. 7.15 !

14

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with double action
slide ring gasket (comp. Fig. 7.2)

- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)

- Constancy of the
liquid level in the separator

ategorie 1G

(i) (a) 2G

LS- 07

ok

yes

LS- 01

ok

yes

LS- 02

ok

yes

no

no

no

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

no

no

no

Operating time

>5s...90s

yes

FS- 04

ok

yes

FS- 08

ok

yes

TS+ 09

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

Stop key
activated

Delay of the
flow-rate testing
after switching on

no

no

no

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

Fig. 7.7 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

! Take note of Fig. 7.14 !

yes

Shut down

compressor

Compressor

operation

OFF

15

Compressor

emergency

cut-off

! Take note of Fig. 7.15 !

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with double action
slide ring gasket (comp. Fig. 7.2)

- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)

-

significant fluctuation of the

liquid level in the separator

ategorie 1G

(i) (a) 2G

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

no

no

LS- 07

ok

yes

LS- 01

ok

yes

LS- 02

ok

yes

LS- 03

ok.

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

FS- 08

ok

yes

TS+ 09

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

no

no

no

no

no

no

no

no

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulatio n

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

Fig. 7.8 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

! Take note of Fig. 7.14 !

Stop key

no

activated

yes

Shut down

compressor

Compressor

operation

OFF

Compressor

emergency

cut-off

! Take note of Fig. 7.15 !

16

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with double action
slide ring gasket (comp. Fig. 7.2)

- operating liquid feeding to the
intake and pressure casing
(comp. Fig. 7.1)

ategorie 1G

(i) (a) 2G

LS- 07

ok

yes

no

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

no

no

LS- 02

ok

yes

LS- 03

ok.

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

FS- 08

ok

yes

TS+ 09

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

nein

no

no

no

no

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulatio n

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- sealing liquid supply

- sealing liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

Fig. 7.9 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

! Take note of Fig. 7.14 !

Stop key

no

activated

yes

Shut down

compressor

Compressor

operation

OFF

Compressor

emergency

cut-off

! Take note of Fig. 7.15 !

17

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with magnetic
coupling (comp. Fig. 7.3)

- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)

- Constancy of the
liquid level in the separator

ategorie 1G

(i) (a) 2G

LS- 01

ok

yes

LS- 02

ok

yes

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

no

no

no

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 10

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

Stop key
activated

Delay of the
flow-rate testing
after switching on

no

no

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- Blockade of the compressor

- internal liquid insufficiency

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

Fig. 7.10 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

! Take note of Fig. 7.14 !

yes

Shut down

compressor

Compressor

operation

OFF

18

Compressor

emergency

cut-off

! Take note of Fig. 7.15 !

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with magnetic
coupling (comp. Fig. 7.3)

- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)

-

significant fluctuation of the

liquid level in the separator

ategorie 1G

(i) (a) 2G

no

LS- 01

ok

yes

LS- 02

ok

yes

LS- 03

ok.

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

no

no

nein

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulatio n

no

no

no

Compressor

emergency

cut-off

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

! Take note of Fig. 7.14 !

TS+ 10

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

no

Compressor
in operation

yes

Stop key

no

activated

yes

Shut down

compressor

Compressor

operation

OFF

Fig. 7.11 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

19

Check:

- service liquid supply

- Blockade of the compressor

- internal liquid insufficiency

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

! Take note of Fig. 7.15 !

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with magnetic
coupling (comp. Fig. 7.3)

- operating liquid feeding to the
intake and pressure casing
(comp. Fig. 7.1)

ategorie 1G

(i) (a) 2G

Check the counter pres sure
only if there is no free outlet
to the environment

Start

Compressor

no

no

LS- 02

ok

yes

LS- 03

ok.

ja

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 10

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

nein

no

no

no

no

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- service liquid circulatio n

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulatio n

Check:

- service liquid supply

- Blockade of the compressor

- internal liquid insufficiency

Check:

- service liquid supply

- service liquid circulatio n

- temperature of the extracted gas

Check:

- pipe at the pressure side

! Take note of Fig. 7.13 !

Fig. 7.12 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

! Take note of Fig. 7.14 !

Stop key

no

activated

yes

Shut down

compressor

Compressor

operation

OFF

Compressor

emergency

cut-off

! Take note of Fig. 7.15 !

20

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

BEGINNING

start

Compressor

Start

compressor

no

yes

yes

Inertisation

necessary

yes

Process valve

GO11 / GO12

is open

no

Start

compressor

FS- 04

ok

no

Operating Time

>5s...90s

yes

Open

Flushing valves

UV13 / UV14

FS- 14

ok

no

Waiting time

>10s

yes

Inertisati on is necessary
with compression of gas
which contain hydrogen

Operating stop with

malfunction message

no

Check:

- service liquid supply

- service liquid circulation

Stop

compressor

no

Operating stop with

malfunction message

yes

no

Stop

compressor

no

FS- 14

ok

yes

Flushing time

ok

yes

Close

Flushing valves

UV13 / UV14

Open

Process valves

GO11 / GO12

END
Start

compressor

Fig. 7.13 Start of compressors of category 1G (inside) / 2G/D (outside)

21

Check:

- flushing gas pressure

- flushing gas supply

Check:

- flushing gas pressure

- flushing gas supply

Operating stop with

malfunction message

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

BEGINNING

shut down

compresssor

no

yes

no

Inertisation

necessary

yes

Close

Process valves

GO11 / GO12

Open

Flushing valves

UV13 / UV14

FS- 14

ok

no

Raising delay

>10s

yes

Flushing time

ok

yes

Close

Flushing valves

UV13 / UV14

no

Compressor

emerg ency shut off

Inertisati on is necessary
with compression of gas
which contain hydrogen

Delay after the opening
of the flus hing valves

! Take note of Fig. 7.15 !

yes

compressor

stopped

no

Stop

compressor

END

shut down

compressor

Fig. 7.14 Shut down of compressors of category 1G (inside) / 2G/D (outside)

22

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

BEGIN

compressor

emergency cut off-

Delay after opening
the flushing valves

no

yes

no

Inertisation

necessary

yes

Close

Process valves

GO11 / GO12

Stop

compressor

Open

Flushing valves

UV13 / UV1 4

FS- 14

ok

no

Raising delay

>10s

yes

Flushing time

ok

ja

Close

Flushing valves

UV13 / UV1 4

no

Connect

the Iner t gas

Close

Flushing valves

UV13 / UV1 4

ALARM

no Inert gas

Inertisation is necessary
with compression of gas
which contain hydrogen

- Eliminate the errors

- Acknowledge the failure

Fig. 7.15 Emergency cut-off of compressors of category 1G (inside) / 2G/D (outside)

Operating stop with

malfunction message

END

compressor

emergency shut-off

23

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

7.3.2 Category 2G (inside) / 2G (outside)

Compressor

operation

ON

Valid for: C

- Compressor with internally flushed
slide ring gasket

- Constancy of the
liquid level in the separator

ategorie 2G(i) (a) 2G

Check the counter pressure
only if there is no free outlet
to the env ironment

Start

Compressor

no

no

LS- 02

ok

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

no

no

no

Check:

- service liquid supply

- service liquid circulation

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Fig. 7.16 MCR-diagram for compressors of category 2G/D (inside) / 2G/D (outside)

no

Stop key
activated

yes

Compressor

operation

OFF

Stop

Compressor

Operating stop with

malfunction message

Stoping the c ompressor

24

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with internally flushed
slide ring gasket

-

significant fluctuation of the

liquid level in the separator

ategorie 2G

(i) (a) 2G

Check the counter pressure
only if there is no free outlet
to the env ironment

Start

Compressor

no

no

LS- 02

ok

yes

LS- 03

ok.

ja

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

nein

no

no

no

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- service liquid circulation

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Fig. 7.17 MCR-diagram for compressors of category 2G/D (inside) / 2G/D (outside)

no

Stop key
activated

yes

Compressor

operation

OFF

Stop

Compressor

Operating stop with

malfunction message

Stoping the c ompressor

25

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with double action
slide ring gasket (comp. Fig. 7.2)

- Constancy of the
liquid level in the separator

ategorie 2G(i) (a) 2G

LS- 07

ok

yes

no

Check:

- sealing liquid supply

- sealing liquid circulation

Check the counter pressure
only if there is no free outlet
to the env ironment

Start

Compressor

no

no

LS- 02

ok

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

FS- 08

ok

yes

TS+ 09

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

no

no

no

no

no

Check:

- service liquid supply

- service liquid circulation

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- sealing liquid supply

- sealing liquid circulation

Check:

- sealing liquid supply

- sealing liquid circulation

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Fig. 7.18 MCR-diagram for compressors of category 2G/D (inside) / 2G/D (outside)

no

Stop key
activated

yes

Compressor

operation

OFF

Stop

Compressor

Operating stop with

malfunction message

Stoping the c ompressor

26

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with double action
slide ring gasket (comp. Fig. 7.2)

-

significant fluctuation of the

liquid level in the separator

ategorie 2G

(i) (a) 2G

LS- 07

ok

yes

no

Check:

- sealing liquid supply

- sealing liquid circulation

Check the counter pressure
only if there is no free outlet
to the env ironment

Start

Compressor

no

no

LS- 02

ok

yes

LS- 03

ok.

ja

Operating time

>5s...90s

yes

FS- 04

ok

yes

FS- 08

ok

yes

TS+ 09

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

nein

no

no

no

no

no

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- service liquid circulation

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- sealing liquid supply

- sealing liquid circulation

Check:

- sealing liquid supply

- sealing liquid circulation

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Fig. 7.19 MCR-diagram for compressors of category 2G/D (inside) / 2G/D (outside)

no

Stop key
activated

yes

Compressor

operation

OFF

Stop

Compressor

Operating stop with

malfunction message

Stoping the c ompressor

27

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with magnetic
coupling (comp. Fig. 7.3)

- Constancy of the
liquid level in the separator

ategorie 2G(i) (a) 2G

Check the counter pressure
only if there is no free outlet
to the env ironment

Start

Compressor

no

no

LS- 02

ok

yes

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 10

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

no

no

no

no

Check:

- service liquid supply

- service liquid circulation

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- Blockade of the compressor

- internal liquid insufficiency

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Fig. 7.20 MCR-diagram for compressors of category 2G/D (inside) / 2G/D (outside)

no

Stop key
activated

yes

Compressor

operation

OFF

Stop

Compressor

Operating stop with

malfunction message

Stoping the c ompressor

28

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Compressor

operation

ON

Valid for: C

- Compressor with magnetic
coupling (comp. Fig. 7.3)

-

significant fluctuation of the

liquid level in the separator

ategorie 2G

(i) (a) 2G

Check the counter pressure
only if there is no free outlet
to the env ironment

Start

Compressor

no

no

LS- 02

ok

yes

LS- 03

ok.

ja

Operating time

>5s...90s

yes

FS- 04

ok

yes

TS+ 10

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

Compressor
in operation

yes

no

nein

no

no

no

no

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- service liquid circulation

Delay of the
flow-rate testing
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- Blockade of the compressor

- internal liquid insufficiency

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

no

Stop key
activated

yes

Compressor

operation

OFF

Stop

Compressor

Operating stop with

malfunction message

Stoping the c ompressor

29

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Fig. 7.21 MCR-diagram for compressors of category 2G/D (inside) / 2G/D (outside)

7.3.3 Category 2G (outside)

Valid for: C

- Compressor with internally flushed
slide ring gasket

ategorie

2G (a)

Compressor

operation

ON

no

Operating time

>5s...90s

yes

no

no

no

Compressor

Operating stop with

malfunction message

Check the counter pres sure
only if there is no free outlet
to the env ironment

Start

Compressor

FS- 04

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

no

Compressor

in operation

yes

Stop key

no

activated

yes

Compressor

operation

OFF

Fig. 7.22 MCR-diagram for compressors of category 2G/D (outside)

Stop

Delay of the
flow-rate te sting
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Stoping the compressor

30

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Valid for: C

- Compressor with double action
slide ring gasket (comp. Fig. 7.2)

ategorie

2G (a)

Compressor

operation

ON

no

Operating time

>5s...90s

yes

no

no

no

no

no

Stop

Compressor

Operating stop with

malfunction message

Check the counter pres sure
only if there is no free outlet
to the env ironment

Start

Compressor

FS- 04

ok

yes

FS- 08

ok

yes

TS+ 09

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

no

Compressor
in operation

yes

no

Stop key

activated

yes

Compressor

operation

OFF

Fig. 7.23 MCR-diagram for compressors of category 2G/D (outside)

Delay of the
flow-rate te sting
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- sealing liquid supply

- sealing liquid circulati on

Check:

- sealing liquid supply

- sealing liquid circulati on

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Stoping the compressor

31

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

Valid for: C

- Compressor with magnetic
coupling (comp. Fig. 7.3)

ategorie

2G (a)

Compressor

operation

ON

no

Operating time

>5s...90s

yes

no

no

no

no

Stop

Compressor

Operating stop with

malfunction message

Check the counter pres sure
only if there is no free outlet
to the env ironment

Start

Compressor

FS- 04

ok

yes

TS+ 10

ok

yes

TS+ 05

ok

yes

PS+ 06

ok

yes

no

Compressor
in operation

yes

no

Stop key

activated

yes

Compressor

operation

OFF

Fig. 7.24 MCR-diagram for compressors of category 2G/D (outside)

Delay of the
flow-rate te sting
after switching on

Check:

- service liquid supply

- service liquid circulation

Check:

- service liquid supply

- Blockade of the compressor

- internal liquid insufficiency

Check:

- service liquid supply

- service liquid circulation

- temperature of the extracted gas

Check:

- pipe at the pressure side

Starting the compressor

Stoping the compressor

32

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Supplementary Operating Instructions for Explosion Protection

8 Maintenance

Regular maintenance is to be performed with use in an operation prone to explosion. Defective parts and
components are to be replaced. Only replacement parts approved by the pump manufacturers are to be
used.

The operator alone is responsible for the performance of monitoring procedures, maintenance
and inspections. The procedures used are to be documented in written form.

So that with easily inflammable gases no potentially explosive gas-air mixtures can arise, the compressor
must be sufficiently flushed with inert gas before the opening of the compressor as well as before the
reconnection after the opening of the compressor.

Checklist for maintenance work

Maintenance procedures

Acoustic test for absence of cavitation
Acoustic check of the bearings (compressor and motor)
Visual test for absence of leakage
Visual run-out test of the coupling
Relubrication of the anti-friction bearings VU 300/450; VU/VH 500/600 with 8g

grease
Relubrication of the anti-friction bearings VU/VH 800 – 1600 with 15g grease

Replacement of all bearings and gaskets (dynamic and static)
Disassembly of the compressor and test of all parts for mechanical, corrosive and

cavitation damages.
Functional test of the control technology. (Equipment-specific operating instructions

are to be observed.)

every
14 days

X
X
X
X

Intervals

every
2000 h

every
8000 h

X

X
X
X

X

33

Speck Pumpen Vakuumtechnik GmbH

zertifiziert: DIN EN ISO 9001

Corporate Information

Supplementary Operating Instructions for Explosion Protection

Title: Supplementary Operating Instructions
Document No.: 1096.0209 - 1
Modification date: 17.03.08
(Replacement for version 04.09.07)

Address

SPECK PUMPEN
Speck Pumpen Vakuumtechnik GmbH
Regensburger Ring 6 - 8
D-91154 Roth
Tel.: [phone]
Fax.: [phone]
E-mail: [e-mail]
Internet:http://www.speck-pumps.de

Duplications of any form are only permitted with the express
approval of the firm SPECK PUMPEN.

34