MAXIMATOR SLGP 3 Series User manual

Air driven liquefied gas pump
SLGP 3-..., SLGP 3-3-..., GLGP 5-..., GLGP 5-5-...
Installation and operating manual

1 0000000383 - 001 - EN
Key information!
Follow the manual for safe and proper use.
Keep the manual near the machine for later reference.
MAXIMATOR GmbH
Lange Straße 6
99734 Nordhausen
Germany
Phone: [phone]
e-mail: [e-mail]
Internet: www.maximator.de
Warranty and liability:
As a general rule, the “General Terms and Conditions” of Maximator GmbH shall apply. These
terms and conditions are available at http://www.maximator.de.
Warranty and liability claims shall not be accepted if they can be attributed to one or more of the
causes mentioned in this manual or explicitly stipulated below:
–Any use other than the intended use indicated in this manual
–Improper commissioning, operation or maintenance
–Operation with faulty safety equipment or incorrectly installed safety equipment and safe-
guards
–Failure to observe the commissioning, operation and maintenance instructions in this man-
ual
–Insufficient monitoring of wear parts
–Wear on seals, guiding elements, etc. due to ageing and operation
02/03/2023 Translation
© Copyright 2023 Maximator GmbH - All rights reserved

Contents
0000000383 - 001 - EN 2
Contents
1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Information regarding this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Rating plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5 List of abbreviations and formula signs used . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Qualification of the personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety and protection measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Personal protective equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Signs and labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Work and danger zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Non obvious hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5 Residual risks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5.1 Start-up and shut down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5.2 Risk of injury posed by noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Design and function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3 Foreseeable misuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4 Misuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5 Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.6 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6.1 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6.2 Dimensions and weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.6.3 Performance values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.6.4 Service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 Transport, packaging and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Dimensions and weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2 Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.4 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.1 Prerequisites for installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Contents
3 0000000383 - 001 - EN
5.2 Installing the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3 Installation of connecting lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3.1 Connecting the drive air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3.2 Control air connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3.3 Connecting the inlet line and outlet line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3.4 Connecting a separate bleed pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3.5 Exhaust silencer installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4.1 Prerequisites for commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4.2 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Prerequisites for operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Normal, safe operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3 Abnormal situations during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4 Signs indicating the product is no longer safe to use . . . . . . . . . . . . . . . . . . . . . 28
6.5 Put the pumps in a safe state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.1 Maintenance intervals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.2 Maintenance work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.2.1 System inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2.2 Leak-testing the connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2.3 Inspect screws and connecting lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.2.4 Cleaning the pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.5 Checking screw connections at the pump and connecting elements. . . . . . . . . . 34
7.2.6 Leak detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.7 Repairing the pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.3 Spare parts and consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.4 Accessories and special tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.5 Customer service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9 Removal and disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.1 Prerequisites for removal and disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.2 Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10 Use in explosion-prone zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Contents
0000000383 - 001 - EN 4
10.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.2 Temperature class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10.3 Operation and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.4 Operation with combustible operating fluids. . . . . . . . . . . . . . . . . . . . . . . . . . . 44
11 Summary of ignition hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

General information
5 0000000383 - 001 - EN
1 General information
1.1 Information regarding this manual
The air driven liquefied gas pump from Maximator is used for oil-free delivery and
compression of refrigerants and other compatible operating fluids. This manual
applies to the following types of air driven pumps: SLGP 3-..., SLGP 3-3..., GLGP 5-
..., GLGP 5-5-... (referred to as "pump" in subsequent sections) and a serial num-
ber above 22000001.
The general drawing included is an integral part of this manual and must be
stored with it.
1.2 Order code
The order code for the liquefied gas pump is structured as follows:
a Model
for example: SLGP 3, GLGP 5-5, ...
b O-ring material HP side
for example: -FKM, -EPDM
c additional codes for device options and/or variants
for example: -FS, -NPT, -FEC

General information
0000000383 - 001 - EN 6
1.3 Rating plate
The rating plate is located on the drive unit of the pump and contains the follow-
ing specifications:
Fig. 1-1 Liquefied gas pump rating plate
1 Max. permitted operating pres-
sure
2 Air driven liquefied gas pump
3 Type (specifications from the or-
der code)
4 Maximum drive pressure
5 Minimum inlet pressure
6 Calendar week/year of manufac-
ture
7 Article number
8 Serial number
9 Pressure ratio
10 CE label
11 Manufacturer contact informa-
tion
12 Operating temperature range
13 ATEX label

General information
7 0000000383 - 001 - EN
1.4 Explanation of symbols
DANGER
This combination of symbol and signal word indicates a hazardous situation
which - if not avoided - may lead to severe injuries or death.
WARNING
This combination of symbol and signal word indicates a potentially hazardous sit-
uation which - if not avoided - may lead to severe injuries or death.
CAUTION
This combination of symbol and signal word indicates a potentially hazardous sit-
uation which - if not avoided - may lead to light or minor injuries.
NOTICE
This combination of symbol and signal word indicates a potentially hazardous sit-
uation which - if not avoided - may lead to property damage or damage to the en-
vironment.
WARNING
This combination of symbol and signal word characterises contents and instruc-
tions for the intended use in potentially explosive areas. If failing to comply with
instructions marked as such, an increased risk of explosion will be posed and may
result in severe or fatal injuries.

General information
0000000383 - 001 - EN 8
1.5 List of abbreviations and formula signs used
Tab. 1-1 List of abbreviations
Tab. 1-2 Formula symbol
1.6 Qualification of the personnel
Only appropriate, qualified and instructed specialist personnel should be permit-
ted to work with the liquefied gas pump. Allowing unqualified personnel to work
on the pump or enter the danger zone creates hazards which could lead to death,
severe injuries and significant property damage.
Abbreviation Description
Fig. Figure
Tab. Table
max. maximum
min. minimum
pcs. pieces
No. Number
s seconds
PPE Personal protective equipment
ex.) for example
CE EU mark of conformity
DGRL EU pressure equipment directive
ATEX EU explosion prevention directive
EPL Equipment Protection Level
CET Central European Time
Formula sym-
bol
Description
i Pressure ratio
pBOperating pressure
pLDrive pressure
pAPrimary gas pressure
T Temperature
TAInput temperature
TBOutput temperature
κ Isentropic exponent

Safety and protection measures
9 0000000383 - 001 - EN
2 Safety and protection measures
The following sections stipulate the residual risks associated with the product,
even when used as intended. In order to reduce the risk of personal injuries and
material damage, and to prevent hazardous situations, you must observe the
safety information listed in this section and the warnings in all other sections of
this manual.
2.1 Personal protective equipment
Personal protective equipment (in other sections also referred to as PPE) protects
personnel from occupational safety and health hazards while at work.
Wearing personal protective equipment may be required during work on the
product. Wherever possible, this personal protective equipment is listed in these
instructions for the individual work steps.
However, detailed specifications of the required protective equipment can only
be determined with full knowledge of the system. The required personal protec-
tive equipment should therefore be determined by the user.
2.2 Signs and labels
The following signs are found on the pump.
Over time, labels can become unrecognisable due to dirt or other causes. As a re-
sult, hazards cannot be identified, or necessary operating indications cannot be
followed. Resulting errors can lead to severe injuries or death.
Keep the labels in good, legible condition and replace any damaged labels.
Tab. 2-1 Overview of labels
2.3 Work and danger zone
The danger zone comprises the entire area surrounding the product. The hazards
associated with the product and the danger zone depend on the application and
the installation location. The danger zone should therefore be determined by the
user.
Signs and labels Graphic display
Rating plate:
The rating plate is affixed to
the drive unit of the pump.
The rating plate indicates
the operating characteris-
tics of the pump.

Safety and protection measures
0000000383 - 001 - EN 10
During assessment, check the following leak points:
Tab. 2-2 leak point danger zone
The hazards are due to the high pressure and extreme temperatures of the con-
veyed medium and/or the hazardous substances used.
As part of their work, the plant design engineer must define detailed danger
zones in the high-pressure equipment and has the specialised knowledge neces-
sary in order to do so.
2.4 Non obvious hazards
Using asphyxiant operating fluids can lead to severe injuries or death by asphyxi-
ation. Assess the risk for the equipment in the risk assessment. The following are
some potential corrective actions:
–Operate the pump in an adequately ventilated space.
–Check the pump for leaks on a regular basis.
–Ensure that lines are connected in such a way as to remain leak-tight for a
long time.
–If necessary, use connecting lines to remove the escaping operating fluids.
leak point leak type leak source Comment
bleed port Minor release high-pressure
seal, rod seal on
drive side
On the -FS version,
the bleed port is
equipped with a
flame safeguard.
Booster head/cyl-
inder
Unexpected Sealing on booster
head and cylinder
Connection screw
fitting
Unexpected Loose screw con-
nection
Connecting line
drive/HP
Unexpected connection line/
fitting/O-ring
drive housing
parts
Unexpected seals in drive unit

Safety and protection measures
11 0000000383 - 001 - EN
2.5 Residual risks
2.5.1 Start-up and shut down
When the pneumatic power supply is restored or the operating parameters are
modified, the pump can start up unexpectedly. This can lead to severe injuries or
death.
Assess the risk for the equipment in the risk assessment.
There is no command device for safe shut-down (E-stop). This can lead to severe
injuries or death.
Assess the risk for the equipment in the risk assessment.
2.5.2 Risk of injury posed by noise
The noise level emitted in the work area depends on the mounting and applica-
tion.
Assess the risk for the equipment in the risk assessment.

Product description
0000000383 - 001 - EN 12
3 Product description
3.1 Design and function
Design of SLGP 3 and GLGP 5 (air reversal, with control air, double-acting)
1 Air piston
2 High-pressure piston
3 Pilot valve lower cap
4 Pilot valve top cap
5 Control slide valve
A Gas inlet
B Gas outlet
PL Drive air port
E Exhaust port
V Spool valve air supply port
Y Pilot valve air supply port
X Pilot port

Product description
13 0000000383 - 001 - EN
Design of SLGP 3-3 and GLGP 5-5 (air reversal, with control air, two-stage)
Functional description SLGP 3, SLGP 3-3, GLGP 5, GLGP 5-5
The operating principle of a liquefied gas pump is similar to that of a pressure in-
tensifier. Low pressure is applied to the large area of the air piston (1) which ap-
plies high-pressure to the small area of the high-pressure piston (2).
The piston of the pump performs oscillating movements until the stall pressure is
reached. In so doing, the high pressure piston delivers and compresses the con-
veyed fluid by means of the check valves in gas inlet (A) and gas outlet (B).
The outlet pressure results from the set drive pressure, primary pressure and vol-
ume flow.
The continuous supply is achieved by means of an internally controlled direction-
al valve, the spool valve (5). The spool valve alternately guides the drive fluid to
the two sides of the air piston.
1 Air piston
2 High-pressure piston
3 Pilot valve lower cap
4 Pilot valve top cap
5 Control slide valve
A Gas inlet
B Gas outlet
PL Drive air port
E Exhaust port
V Spool valve air supply port
Y Pilot valve air supply port
X Pilot port

Product description
0000000383 - 001 - EN 14
The spool valve is controlled by two directional valves, the pilot valves (3, 4),
which are operated mechanically by the air piston in its stop positions. The pilot
valves aerate and vent the operating area of the control slide valve.
An equilibrium of forces on the drive and high-pressure side is generated as soon
as the stall pressure is reached. The liquefied gas pump stops and no longer con-
sumes drive fluid. A pressure drop on the high-pressure side or a pressure in-
crease on the drive side result in an automatic restart of the liquefied gas pump
while the compressed fluid is compressed until an equilibrium of forces is re-
stored.

Product description
15 0000000383 - 001 - EN
Design of pressure intensifiers SLGP 3-DÜ and GLGP 5-DÜ (double-acting)
1 Air piston
2 High-pressure piston
A Gas inlet
B Gas outlet
PL1 Drive air port 1
PL2 Drive air port 2

Product description
0000000383 - 001 - EN 16
Design of pressure intensifiers SLGP 3-3-DÜ and GLGP 5-5-DÜ (two-stage)
Functional description SLGP 3-DÜ, SLGP 3-3-DÜ, GLGP 5-DÜ, GLGP 5-5-DÜ
The operating principle of a liquefied gas pump is similar to that of a pressure in-
tensifier. Low pressure is applied to the large area of the air piston (1) which ap-
plies high-pressure to the small area of the high-pressure piston (2).
Continuous discharge is achieved by actuating the air piston side in alternation
via the drive air ports (PL1, PL2).
The piston of the pump performs oscillating movements until the stall pressure is
reached. In so doing, the high pressure piston delivers and compresses the con-
veyed fluid by means of the check valves in gas inlet (A) and gas outlet (B).
The outlet pressure results from the set drive pressure, primary pressure and vol-
ume flow.
An equilibrium of forces on the drive and high-pressure side is generated as soon
as the stall pressure is reached. The liquefied gas pump stops and no longer con-
sumes drive fluid.
1 Air piston
2 High-pressure piston
A Gas inlet
B Gas outlet
PL1 Drive air port 1
PL2 Drive air port 2

Product description
17 0000000383 - 001 - EN
3.2 Intended use
Within their technical limits, liquefied gas pumps are used to deliver and com-
press compatible refrigerants and other compatible operating fluids.
If the liquefied gas pump bears an ATEX label and comes with a declaration of con-
formity, it is designated for use in corresponding potentially explosive areas.
3.3 Foreseeable misuse
The product may only be used in accordance with the indications in this manual.
The product cannot be used for:
–sealing containers
–producing/processing food with direct contact
–producing pharmaceutical products in direct contact
3.4 Misuse
Unauthorised modifications or technical changes to the product may lead to ac-
cidents with serious or fatal injuries.
Never carry out unauthorised modifications or technical changes to the product!
3.5 Ports
Comply with the connected load specifications for all interface connections. Refer
to the enclosed general drawing for the connection ports available on the respec-
tive pump.
The following interfaces are standard on the pumps:
Drive air inlet “PL“
Input of drive fluid.
Inlet port "A"
Input of operating fluid.
Outlet port "B"
Output of operating fluid.
Exhaust port "E"
Output of expanding drive fluid.
Pilot air port “X”
Port for pilot air. The pump will only operate if the pilot air connection is pres-
surised. The pressure of the pilot air must always be larger or equal to the drive
pressure to ensure trouble-free function. The same requirements regarding com-
pressed air quality apply to the pilot air as to the drive air.

Product description
0000000383 - 001 - EN 18
Spool valve “V” ventilation port
Ventilation and bleeding of the spool valve. The port must not be obstructed.
Pilot valve "Y" exhaust port
Bleeding of the spool valve actuator chamber. An air pulse escapes here after
each stroke. The port must not be obstructed.
This port can be used to connect a stroke counter.
Bleed port high-pressure side “Z”
Discharge of the leakage from the high-pressure unit and the pneumatic drive. A
bleed pipe can be connected. The bleed port opening must not be obstructed.
3.6 Technical specifications
3.6.1 Operating conditions
Ambiance
Tab. 3-1 Ambient conditions
Operating fluids (based on ISO 8573-1)
Tab. 3-2 Operating fluids
Specification Value Unit
Ambient temperature, min. - 20 °C
Ambient temperature, max. + 60 °C
Installation area protected against
climatic exposure
Specification Value Unit
Operating temperature, minimuma
a. Depending on the design of the liquefied gas pump (see enclosed general drawing)
- 20 °C
Operating temperature, maximum.b
b. Depending on the design of the liquefied gas pump (see enclosed general drawing)
+ 60 °C
max. particle count at 0.1 - 0.5 µm size not indicated
(Class 3)
pcs.
max. particle count at 0.5 - 1.0 µm size 90,000 (Class 3) pcs.
max. particle count at 1.0 - 5.0 µm size 1,000 (Class 3) pcs.
max. solids, particle concentration 5 (Class 6) mg/m³
Particle size, max. 10 µm

Product description
19 0000000383 - 001 - EN
The liquefied gas pump can be used with all refrigerant of class A1, A2, A2L or A3
as per DIN EN 378-1, as well as all other operating fluids, provided they are not
chemically or physically corrosive to the pump materials. The refrigerants and
other operating fluids should not pose any danger to the personnel. The pump is
not suitable for use with unstable, ignitable or oxidising operating fluids. The ma-
terials used can be found on the enclosed general drawing. Special versions of the
liquefied gas pump can be suitable for other operating fluids. If you are unsure re-
garding the use of a special fluid, please don't hesitate to contact Maximator.
The most common operating fluids of the approved safety classes are shown in
the following table:
Tab. 3-3 Examples of approved operating fluids
In case of applications with special fluid quality specifications beyond those typi-
cally used in high pressure systems engineering, the equipment manufacturer
must verify that the pump is suitable for the application. Such applications in-
clude (but are not limited to):
–Compression of auxiliary fluids in food processing
–Applications in the pharmaceutical industry without direct contact
–etc.
Refrigerant number Formula symbol Safety class
R 12 CCI2F2A1
R 134a CH2FCF3A1
R 142b CH3CClF2A2
R 32 CH2F2A2L
R 1234yf CF3CF=CH2A2L
R 290 CH3CH2CH3A3
R 600a CH(CH3)3A3