Speck pumpen VH 40 User manual

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
1
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
The conveyed media belong
according to EN 13463-1 to the
Temperature classes Explosion groups further details
for VU 20 to VU 1600, VH 20 to VH 1600 and VZ 110 to VZ 180 only
1G T1, T2, T3 or T4 IIA or IIB Medium contains hydrogen
or
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.

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
2
1 Operating thresholds
Operation as vacuum pump and compressor
Suction pressure p
S
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.
Compression pressure p
D
800…2600 mbar
absolute
The maximum compression pressure described by
the manufacturer-characteristic may not be
exceeded.
Pressure differential p
D
- p
S
200…1800 mbar The maximum pressure differential described by
the manufacturer-characteristic may not be
exceeded.
Inlet temperature
of the medium to be pumped
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.
Temperature t
B
of the operating liquid
t
B
= - 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.
Supply pressure p
B
of the operating liquid
p
B
= p
S
+300 mbar
p
B
= p
D
…p
D
+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.
Temperature t
S
of the flushing liquid
(double-action slide ring gasket)
t
S
= - 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.
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.
Different operating conditions on request.

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
3
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.
VH
VH
VH
VH
VH
VH
VH
VH
VH
VH
VH
VH
VH
VH
Type
20 40 60 110 140 180 300 350 400 500 600 800 1200 1600
M
Vacuum
[Nm] 5,8 9,0 10,3 33 42 60 96 110 121 173 217 481 611 741
M
Compressor
[Nm] 10,8 20,2 19,8 68 74 83
n
max
[min
-1
] 3600 3600 3600 1800 1800 1800 1800 1800 1800 1800 1800 1200 1200 1200
VU
VU
VU
VU
VU
VU
VU
VU
VU
VU
VU
VU
Type
20 40 80 140 220 300 450 500 600 800 1200 1600
M
Vacuum
[Nm] 4,9 7,5 13 40 59 82 114 151 192 364 494 650
M
Compressor
[Nm] 6,7 11,7 22 74 157 227 288 375 728 962 1183
n
max
[min
-1
] 3600 3600 3600 1800 1800 1800 1800 1800 1800 1200 1200 1200
VZ
VZ
VZ
VZ
VZ
VN
VN
VN
Type
30
50
110
140
180
95
125
180
M
Vacuum
[Nm]
6,7 10 33 42 60 33 42 60
M
Compressor
[Nm]
68 74 83
n
max
[min
-1
] 3600 3600 1800 1800 1800 1800 1800 1800
VI VI VI VI VI V V/VG V/VG V/VG V/VG V/VG V VType
2 8 15 30 55 6 30 55 95 130 255 330 430
M
Vacuum
[Nm] 0,5 1,8 2,5 5 10 33 42 60 33 42 60 0,5 1,8
C
ompressor
[Nm]
n
max
[min
-1
]
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 maximum allowable for category 2
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
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

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
4
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
Overflow
Fresh liquid
Inert gas
Anti-cavitation
protection LS-
02
LS-
01
LS-
03
SO+
00

TS+
05 PS+
06
FS-
04
GO
11 GO
12
UV
13 UV
14
FS-
14
The inert gas flushing is only necessary for
gases and vapors, which contain hydrogen
Overflow
Fresh liquid
Coolant
Inert gas
Anti-cavitation
protection LS-
02
LS-
01
LS-
03
SO+
00

TS+
05 PS+
06
FS-
04
GO
11 GO
12
UV
13 UV 14
FS-
14
The inert gas flushing is only necessary for
gases and vapors, which contain hydrogen
Fig. 5.1. open circuit cooling Fig. 5.2. closed circuit cooling

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
5
open circuit cooling
closed 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.
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.

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
6
VH VH VH VH VH VH VH VH VH VH VH VH VH VH
Type 20 40 60 110 140 180 300 350 400 500 600 800 1200
1600
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 [l]
3 3 3 17 17 17 33 33 33 62 62 83 83 83
of the side-mounted
separator [l]
17 17 30 40 40 40 50 50 50 90 90 110 110 110
5-fold volume
with front-mounted
separator [l]
27 29 31 131 148 166 269 280 303 494 529 829 956 1036
with side-mounted
separator [l]
97 99 166 246 263 281 354 365 388 634 669 964 1091 1171
VU VU VU VU VU VU VU VU VU VU VU VU
Type 20 40 80 140 220 300 450 500 600 800 1200
1600
Type
[l]
1,8 2 7 9 11 16 24 24 28 64 70 76
Volume contents [l] 0,3 0,3 1,1 1,4 2,2 2,4 4,8 4,8 5,6 10 14 15
of the compressor [l]
3 3 17 21 34 33 39 55 55 83 72 72
of the piping [l]
17 17 40 40 40 50 50 90 90 110 110 110
of the front-mounted
separator
of the side-mounted
separator [l]
25 27 125 157 236 257 339 419 443 783 780 816
5-fold volume [l] 95 97 240 252 266 342 394 594 618 918 970 1006
VZ VZ VZ VZ VZ VN VN VN
Type 30 50 110 140 180 95 125 180
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 [l]
3 3 17 17 17 22 22 22
of the side-mounted
separator [l]
17 17 40 40 40 40 40 40
5-fold volume
with front-mounted
separator [l]
25 27 131 148 166 136 141 150
with side-mounted
separator [l]
95 97 246 263 281 226 231 240
VI VI VI VI VI V V/VG V/VG V/VG V/VG V/VG V/VG V V
Type 2 8 15 30 55 6 30 55 95 130 155 255 330 430
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 [l] 1 1,7 2,2 3,5 3,5 17 17 17 22 22 22 22 1 1,7
of the side-mounted
separator [l] 2 3,5 4 6 6 40 40 40 40 40 40 40 2 3,5
5-fold volume
with front-mounted
separator [l] 13 20 26 34 39 131 148 166 136 141 143 150 13 20
with side-mounted
separator [l] 18 29 35 46 51 246 263 281 226 231 233 240 18 29
Tab. 6.1 Volumes for systems with front- and side-mounted separator

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
7
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
LS-
02
LS-
03
FS-
04
TS+
05
LS-
01
PS+
06
Anti cavitation
protection
Operating liquid pipe
to the suction casing
Operating liquid pipe
to the pressure casing
(optional)
Operating liquid pipe
to the pressure casing
(optional)
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.

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
8
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
the compressor
Always
TS+ 05 Temperature switch on the pressure side of the
compressor
Always
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
compressor
Always
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
the compressor
Always
TS+ 05 Temperature switch on the pressure side of the
compressor
Always
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

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
9
7.1.4 Additional required MCR-equipment for compressors with double-action slide ring gasket
LS- 07 Liquid level switch for clearance
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
After the clearance to start by LS- 07 a
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
and 90 s. (see data sheet).
LS-
07
FS-
08
TS+
09
FS-
08
TS+
09
LS-
07
Fig. 7.2. MCR for double
-
action slide ring gasket
Additional required MCR-equipment for compressors with magnet coupling
TS+ 10 Temperature switch at the separating can of the compressor
TS+
10
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!

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
10
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.
VH
20 VH 40 VH 60 VH 110 VH 140 VH 180 VH 300 VH 350 VH 400 VH 500 VH 600 VH 800 VH 1200 VH 1600
VU
20 VU 40 VU 80
VU
140 VU 220 VU 300 VU 450 VU 500 VU 600 VU 800 VU 1200 VU 1600
VZ
30 VZ 50 VZ 110 VZ 140 VZ 180
VN 95 VN
125 VN 180
V
6 V/V G
30
V/V
G
55
V/V
G95 V/VG 130 V/VG 155 V/VG 255 V 330 V 430
Compressor-size
VI 2 VI
8/15 VI 30 VI 55
Switching point
FS- 04
[l/min]
0,5
to
1,0
1,0
to
2,0
3,5
to
5,0
3,5
to
5,0
6,5
to
10
9,0
to
13,5
9,0
to
13,5
9,0
to
13,5
10
to
18
10
to
18
10
to
18
12
to
22
12
to
22
20
to
60
20 to
60 20 to 60
Tab. 7.1 Amounts of operating liquid in the liquid-ring compressors

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
11
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 start-
up 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.

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
12
7.3 MCR flowchart
7.3.1 Category 1G (inside) / 2G/D (outside)
TS+ 05
ok
no
yes
FS- 04
ok
no
yes
PS+ 06
ok
no
yes
LS- 01
ok
no
yes
Check:
- pipe at the pressure side
Delay of the
flow-rate testing
after switching on
Check:
- service liquid supply
- service liquid circulation
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- 02
ok
no
yes
Compressor
operation
ON
Stop key
activated
no
yes
! Take note of Fig. 7.13 !
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Start
Compressor Compressor
in operation
yes
no
Shut down
compressor
Compressor
emergency
cut-off
Check:
- service liquid supply
- service liquid circulation
Check:
- service liquid supply
- service liquid circulation
- temperature of the extracted gas
Check:
- service liquid supply
- service liquid circulation
Check the counter pressure
only if there is no free outlet
to the environment
Compressor
operation
OFF
Operating time
>5s...90s
yes
no
Fig. 7.4 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
13
LS- 03
ok.
no
yes
Valid for: C
- Compressor with internally flushed
slide ring gasket
- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)
ategorie 1G
-
(i) (a)2G
significant fluctuation of the
liquid level in the separator
LS- 01
ok
no
yes
LS- 02
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
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
FS- 04
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
- temperature of the extracted gas
Check:
- pipe at the pressure side
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
Stop key
activated
no
yes
! Take note of Fig. 7.13 !
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
Compressor
operation
ON
Operating time
>5s...90s
yes
no
Check the counter pressure
only if there is no free outlet
to the environment
Fig. 7.5 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
14
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
Compressor
operation
ON
LS- 02
ok
no
yes
LS- 03
ok.
no
yes
Operating time
>5s...90s
yes
no
FS- 04
ok
no
yes
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
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
! Take note of Fig. 7.13 !
Stop key
activated
no
yes
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
Check the counter pressure
only if there is no free outlet
to the environment
Fig. 7.6 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
15
FS- 04
ok
no
yes
LS- 07
ok
no
yes
FS- 08
ok
no
yes
TS+ 09
ok
no
yes
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
Compressor
operation
ON
Check:
- sealing liquid supply
- sealing liquid circulation
LS- 01
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
LS- 02
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
Delay of the
flow-rate testing
after switching on
Check:
- service liquid supply
- service liquid circulation
Operating time
>5s...90s
yes
no
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
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
! Take note of Fig. 7.13 !
Stop key
activated
no
yes
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
Check the counter pressure
only if there is no free outlet
to the environment
Fig. 7.7 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
16
FS- 04
ok
no
yes
LS- 07
ok
no
yes
FS- 08
ok
no
yes
TS+ 09
ok
no
yes
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)
ategorie 1G
-
(i) (a)2G
significant fluctuation of the
liquid level in the separator
Compressor
operation
ON
Check:
- sealing liquid supply
- sealing liquid circulation
LS- 01
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
LS- 02
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
Delay of the
flow-rate testing
after switching on
Check:
- service liquid supply
- service liquid circulation
Operating time
>5s...90s
yes
no
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
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
! Take note of Fig. 7.13 !
Stop key
activated
no
yes
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
LS- 03
ok.
no
yes
Check:
- service liquid supply
- service liquid circulation
Check the counter pressure
only if there is no free outlet
to the environment
Fig. 7.8 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
17
FS- 04
ok
no
yes
LS- 07
ok
no
yes
FS- 08
ok
no
yes
TS+ 09
ok
no
yes
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
Compressor
operation
ON
Check:
- sealing liquid supply
- sealing liquid circulation
LS- 02
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
Delay of the
flow-rate testing
after switching on
Check:
- service liquid supply
- service liquid circulation
Operating time
>5s...90s
yes
no
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
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
! Take note of Fig. 7.13 !
Stop key
activated
no
yes
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
LS- 03
ok.
nein
yes
Check:
- service liquid supply
- service liquid circulation
Check the counter pressure
only if there is no free outlet
to the environment
Fig. 7.9 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
18
FS- 04
ok
no
yes
Compressor
operation
ON
LS- 02
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
Delay of the
flow-rate testing
after switching on
Check:
- service liquid supply
- service liquid circulation
Operating time
>5s...90s
yes
no
Check:
- service liquid supply
- service liquid circulation
- temperature of the extracted gas
Check:
- pipe at the pressure side
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
! Take note of Fig. 7.13 !
Stop key
activated
no
yes
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
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
no
yes
Check:
- service liquid supply
- service liquid circulation
Check:
- service liquid supply
- Blockade of the compressor
- internal liquid insufficiency
TS+ 10
ok
no
yes
Check the counter pressure
only if there is no free outlet
to the environment
Fig. 7.10 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
19
FS- 04
ok
no
yes
Compressor
operation
ON
Check:
- service liquid supply
- service liquid circulation
Delay of the
flow-rate testing
after switching on
Check:
- service liquid supply
- service liquid circulation
Operating time
>5s...90s
yes
no
Check:
- service liquid supply
- service liquid circulation
- temperature of the extracted gas
Check:
- pipe at the pressure side
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
! Take note of Fig. 7.13 !
Stop key
activated
no
yes
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
Valid for: C
- Compressor with magnetic
coupling (comp. Fig. 7.3)
- no operating liquid feeding to the
pressure casing (comp. Fig. 7.1)
ategorie 1G
-
(i) (a)2G
significant fluctuation of the
liquid level in the separator
LS- 01
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
Check:
- service liquid supply
- Blockade of the compressor
- internal liquid insufficiency
TS+ 10
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
LS- 02
ok
no
yes
Check the counter pressure
only if there is no free outlet
to the environment
LS- 03
ok.
nein
yes
Fig. 7.11 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
20
FS- 04
ok
no
yes
Check:
- service liquid supply
- service liquid circulation
Delay of the
flow-rate testing
after switching on
Check:
- service liquid supply
- service liquid circulation
Operating time
>5s...90s
yes
no
Check:
- service liquid supply
- service liquid circulation
- temperature of the extracted gas
Check:
- pipe at the pressure side
TS+ 05
ok
no
yes
PS+ 06
ok
no
yes
Start
Compressor Compressor
in operation
yes
no
! Take note of Fig. 7.13 !
Stop key
activated
no
yes
! Take note of Fig. 7.15 ! ! Take note of Fig. 7.14 !
Shut down
compressor
Compressor
emergency
cut-off
Compressor
operation
OFF
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:
- service liquid supply
- Blockade of the compressor
- internal liquid insufficiency
TS+ 10
ok
no
yes
LS- 03
ok.
nein
ja
Check:
- service liquid supply
- service liquid circulation
LS- 02
ok
no
yes
Compressor
operation
ON
Check the counter pressure
only if there is no free outlet
to the environment
Fig. 7.12 MCR-diagram for compressors of category 1G (inside) / 2G/D (outside)