Pneumatech PMH C User manual

Pneumatech
Compressed air filters
PMH C, PMH D, PMH G, PMH P, PMH S, PMH V, PMH WS 10-2550,
PMH WS 6-1500
Instruction book

Pneumatech
Compressed air filters
PMH C, PMH D, PMH G, PMH P, PMH S, PMH V,
PMH WS 10-2550, PMH WS 6-1500
Instruction book
Original instructions
Copyright notice
Any unauthorized use or copying of the contents or any part thereof is prohibited.
This applies in particular to trademarks, model denominations, part numbers and
drawings.
This instruction book is valid for CE as well as non-CE labelled machines. It meets the
requirements for instructions specified by the applicable European directives as
identified in the Declaration of Conformity.
2019 - 12
No. 2920 7194 90
www.pneumatech.com

Table of contents
1 Safety precautions..........................................................................................................4
1.1 SAFETY ICONS................................................................................................................................... 4
1.2 SAFETY PRECAUTIONS DURING INSTALLATION...........................................................................................4
1.3 SAFETY PRECAUTIONS DURING OPERATION.............................................................................................. 5
1.4 SAFETY PRECAUTIONS DURING MAINTENANCE OR REPAIR........................................................................... 5
1.5 DISPOSAL OF USED MATERIAL............................................................................................................... 6
2 Description......................................................................................................................7
2.1 GENERAL DESCRIPTION....................................................................................................................... 7
2.2 OPTIONS........................................................................................................................................ 10
3 Installation.....................................................................................................................13
3.1 GENERAL REMARKS.......................................................................................................................... 13
3.2 SPECIFIC REMARKS...........................................................................................................................14
3.3 ISO 8573-1.................................................................................................................................. 15
3.4 ISO 12500................................................................................................................................... 17
4 Maintenance..................................................................................................................18
4.1 MAINTENANCE................................................................................................................................. 18
4.2 FILTER ELEMENT CHANGE...................................................................................................................18
4.3 SERVICE INTERVALS..........................................................................................................................19
5 Technical data...............................................................................................................21
5.1 REFERENCE CONDITIONS................................................................................................................... 21
5.2 PRINCIPAL DATA...............................................................................................................................21
5.3 SPECIFIC DATA................................................................................................................................ 21
5.4 RATED FLOW AT REFERENCE CONDITIONS............................................................................................. 23
5.5 CORRECTION FACTORS......................................................................................................................24
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5.6 DIMENSIONS AND WEIGHT.................................................................................................................. 24
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1 Safety precautions
1.1 Safety icons
Explanation
Danger to life
Warning
Important note
1.2 Safety precautions during installation
1. Install the equipment where the ambient air is cool and as clean as possible. Consult section
Reference conditions and limitations.
2. During installation or any other intervention on the equipment or one of the connected
machines, the machines must be stopped, de-energized and the isolating switch opened
and locked before any maintenance or repair. As a further safeguard, persons switching on
remotely controlled machines shall take adequate precautions to ensure that there is no one
checking or working on the machine. To this end, a suitable notice shall be affixed to the
start equipment.
3. Install the equipment in an area free of flammable fumes, vapours and particles, e.g. paint
solvents, that can lead to internal fire or explosion.
4. The electrical connections must correspond to the applicable codes. The equipment must be
earthed and protected against short circuits by fuses in all phases. A lockable power
isolating switch must be installed near the equipment.
5. For machines controlled by a central control system, a sign stating "This machine may start
without warning" must be affixed near the instrument panel.
6. In multiple compressor systems, manual valves must be installed to isolate each
compressor. Non-return valves (check valves) must not be relied upon for isolating pressure
systems.
7. Never remove or tamper with the safety devices.
8. If the maximum pressure of the compressor is higher than the design pressure of the
connected equipment (e.g. a nitrogen generator or an oxygen generator), a full flow safety
valve must be installed between the compressor and the connected equipment, in order to
be able to blow off the excessive pressure.
Also consult following safety precautions: Safety precautions during operation and
Safety precautions during maintenance or repair.
These precautions apply to electrical devices.
For precautions applying to the connected equipment consult the relevant instruction
book.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your device.
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1.3 Safety precautions during operation
All responsibility for any damage or injury resulting from neglecting these precautions, or
non-observance of the normal caution and care required for installation, operation,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
1. Persons switching on remotely controlled machines shall take adequate precautions to
ensure that there is no one checking or working on the machine. To this end, a suitable
notice shall be affixed to the remote start equipment.
2. Never operate the device in the presence of flammable or toxic fumes, vapours or particles.
3. Never operate the device below or in excess of its limit ratings.
4. Do not operate the device when there are flammable or toxic fumes, vapors or particles.
5. Keep all bodywork doors and panels closed during operation. The doors may be opened for
short periods only, e.g. to carry out routine checks.
6. People staying in environments or rooms where the sound pressure level reaches or
exceeds 90 dB(A) shall wear ear protectors.
7. Periodically check that:
• All guards and fasteners are in place and tight
• All hoses and/or pipes are in good condition, secure and not rubbing
• There are no leaks
• All electrical leads are secure and in good order
8. Never remove or tamper with the safety devices.
Also consult following safety precautions: Safety precautions during installation and
Safety precautions during maintenance or repair.
These precautions apply to electrical devices.
For precautions applying to the connected equipment consult the relevant instruction
book.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.
1.4 Safety precautions during maintenance or repair
All responsibility for any damage or injury resulting from neglecting these precautions, or
non observance of the normal caution and care required for installation, operation,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
1. Use only the correct tools for maintenance and repair work.
2. Use only genuine spare parts.
3. A warning sign bearing a legend such as "Work in progress - do not start" shall be attached
to the starting equipment, including all remote start equipment.
4. Persons switching on remotely controlled machines shall take adequate precautions to
ensure that there is no one checking or working on the machine. To this end, a suitable
notice shall be affixed to the remote start equipment.
5. Never use flammable solvents or carbon tetrachloride for cleaning parts. Take safety
precautions against toxic vapors of cleaning liquids.
6. Scrupulously observe cleanliness during maintenance and repair. Keep dirt away by
covering the parts and exposed openings with a clean cloth, paper or tape.
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7. Never use a light source with open flame for inspecting the interior of the device.
8. All regulating and safety devices shall be maintained with due care to ensure that they
function properly. They may not be put out of action.
9. Before clearing the device for use after maintenance or repair, check that operating
pressures, temperatures and time settings are correct. Check that all control and shutdown
devices are fitted and that they function correctly.
10. Make sure that no tools, loose parts or rags are left in or on the device.
11. Never use caustic solvents which can damage materials of the device.
Also consult following safety precautions: Safety precautions during installation and
Safety precautions during operation.
These precautions apply to electrical devices.
For precautions applying to the connected equipment consult the relevant instruction
book.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.
Units and/or used parts must be disposed of in an environmentally friendly and safe
manner and in line with the local recommendations and legislation.
1.5 Disposal of used material
Used filters or any other used material (e.g. desiccant, lubricants, cleaning rags, machine parts,
etc.) must be disposed of in an environmentally friendly and safe manner, and in line with the
local recommendations and environmental legislation.
Electronic components are subject to the EU Directive 2012/19/EC for Waste Electrical and
Electronic Equipment (WEEE). As such, these parts must not be disposed of at a municipal
waste collection point. Refer to local regulations for directions on how to dispose of this product in
an environmental friendly manner.
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2 Description
2.1 General description
Pneumatech filters are available in a number of grades and sizes. (P, G, C, S, D, V, sizes 1–18)
(WS, sizes 1–13)
Naming of the filters: PMH (grade)(flow)(connection)(-/indicator/gauge)(drain)
Example: PMH P 476 (G1 1/4) G A is a Pneumatech Filter of the P grade with a nominal flow of
476 m³/h, a G1 1/4 connection with a pressure gauge and an automatic drain.
Dependent on the filter size, they are standard equipped with either a differential pressure
indicator or a differential pressure gauge.
Grade Description Maximum
air inlet
pressure
Air flow Differential pressure Drain
Indicator Gauge
P Coalescing and particulate
general purpose prefilter
Removes solid particles,
dust, liquid and oil aerosol.
16 bar From
inside to
outside
• Size 1–
2: Not
available
.
• Size 3–
5:
Standard
• Size 6–
18: Not
available
.
• Size 1–
2: Not
available
.
• Size 3–
5:
Optional
• Size 6–
18:
Standard
Automatic
drain
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Grade Description Maximum
air inlet
pressure
Air flow Differential pressure Drain
Indicator Gauge
G Coalescing filters for
general purpose
protection, removing solid
particles, liquid water and
oil aerosol
Total mass efficiency:
>99.25 %
16 bar From
inside to
outside
• Size 1–
2: Not
available
.
• Size 3–
5:
Standard
• Size 6–
18: Not
available
.
• Size 1–
2: Not
available
.
• Size 3–
5:
Optional
• Size 6–
18:
Standard
Automatic
drain
C High efficiency coalescing
filters, removing solid
particles, liquid water and
oil aerosol
Total mass efficiency:
>99.9 %
16 bar From
inside to
outside
• Size 1–
2: Not
available
.
• Size 3–
5:
Standard
• Size 6–
18: Not
available
.
• Size 1–
2: Not
available
.
• Size 3–
5:
Optional
• Size 6–
18:
Standard
Automatic
drain
S Particulate filters for dust
protection
Count efficiency: 99.92 %
at most penetrating particle
size.
20.7 bar From
outside to
inside
• Size 1–
2: Not
available
.
• Size 3–
5:
Standard
• Size 6–
18: Not
available
.
• Size 1–
2: Not
available
.
• Size 3–
5:
Optional
• Size 6–
18:
Standard
Manual
drain
D High efficiency particulate
filters for dust protection
Count efficiency: 99.98 %
at most penetrating particle
size.
20.7 bar From
outside to
inside
• Size 1–
2: Not
available
.
• Size 3–
5:
Standard
• Size 6–
18: Not
available
.
• Size 1–
2: Not
available
.
• Size 3–
5:
Optional
• Size 6–
18:
Standard
Manual
drain
V Oil vapour and odour
removal filter
Air flows through the
activated carbon, which
absorbs oil vapours and
odours.
20.7 bar From
inside to
outside
/ / Manual
drain
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Grade Description Maximum
air inlet
pressure
Air flow Differential pressure Drain
Indicator Gauge
WS Condensed liquid water
removal filter
16 bar From
outside to
inside
/ / Automatic
drain or
level-
controlled
drain
The V filter does not remove methane, carbon monoxide, carbon dioxide or other toxic
gases and fumes!
(1) The differential pressure gauge indicates the pressure drop over the filter.
(2) The differential pressure indicator turns red as the pressure drop over the filter increases.
Drains
The automatic mechanical float drain valve will discharge liquid from the filter bowl when it
reaches a fixed level in the bowl.
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1 Automatic float drain
The manual drain can be used to manually discharge dust or liquid from the filter bowl.
1 Manual drain valve
2.2 Options
Filter connection kit
This kit allows to interconnect the filter heads if two or more filters are installed in series.
Always observe the correct air flow direction. Install a G filter upstream of a C grade
filter. An arrow indicating the air flow direction is shown on the filter head or differential
pressure indicator.
Wall mounting kit
For wall mounting, a special set is available as option. Fit the mounting brackets with bolts,
washers and nuts to a solid frame within easy reach, leaving sufficient space for maintenance
and service.
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Voltage-free contact
A voltage-free switch, mounted in the differential pressure gauge, closes at a pressure drop of
0.35 bar (5 psi) and can be used for remote control or alarm purposes.
Electronic drain
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The electronic drain is a zero loss, electronically operated drain valve, specially designed to drain
oil condensate. A sensor senses the condensate level. If this level exceeds a preset value, the
drain waits for a fixed programmed time, then a solenoid valve is activated and the condensate is
discharged. When all the condensate is discharged, the solenoid valve closes and condensate is
collected again. This way, the loss of air is reduced to a minimum.
If the microcontroller registers a malfunction, the automatic drain valve will automatically change
to alarm mode. This alarm signal can be relayed via a potential-free contact.
The electronic drain is available for 2 operating voltages: 220 V and 115 V. An extra electric
wiring can be foreseen to connect the potential free contacts and an external test button.
Always remove the manual drain or the automatic drain of the filter before installing the
electronic drain.
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3 Installation
3.1 General remarks
When installing the filter, keep in mind the following:
• Be sure that the piping is internally clean, especially downstream of the filter.
• Select the filter grade in line with the application requirements.
When selecting the filter size, take care that the maximum flow capacity is not exceeded to
make sure that filtration performance and filter lifetime are guaranteed.
• Take into account the flow direction:
• The filters must be mounted vertically:
• If the unit is integrated in a multiple line system, provide isolating valves and (if required) a
bypass.
• The automatic drain has a special connection allowing easy installation of a hose or a quick
coupling to pipe away the drained liquid. This drained liquid should be fed into a non-
pressurized vessel or drain pipe. In case two filters are installed next to each other, the drain
pipe length per filter should be at least 2 meters before connecting them together. The pipe
diameter of the collector should be at least twice the diameter of the pipes connected to the
filter drain.
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• Open and close isolating valves slowly, as a sudden pressure rise or pressure drop can
cause irreversible damage to the filter element.
3.2 Specific remarks
P filter
The P grade filter can be used in installations where high oil or dust loads are expected.
In critical applications it is recommended to install a grade G (for oil) or a grade S (for dust) or a
grade C (for oil) or a grade D (for dust) filter downstream the P filter to improve the air quality.
G filter
No specific remarks.
C filter
The filter must be mounted as close as possible to the point of use of the air
It is recommended to install a grade G filter upstream the C filter. If not, the load on the C filter
element may become too high and will reduce its lifetime.
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S filter and D filter
When the S and D filters are used with an adsorption type air dryer, install the filter downstream
of the dryer.
V filter
To protect the activated carbon element, a V filter must always be preceded by a G and C filter.
The filter should be mounted as close as possible to the point of use of the air.
3.3 ISO 8573-1
General
For new installations as well as for installations that have to be made up-to-date, the ISO
8573-1:2010 standard can be used. Some proposals are given fulfilling this standard.
This part specifies purity classes of compressed air with respect to particles, water and oil,
independent of the location in the compressed air system at which the air is specified or
measured, for ISO 8573-1:2010 standard.
The ISO 8573-1:2010 standard only concerns compressed air for general use and does
not deal with, or is not applicable to, e.g. breathing air.
ISO
class
Dust Water Oil
Maximum number of particles per m3 as
function of particle size d
Pressure dew point Total oil concentration
(aerosol, liquid and
vapour) mg/m3
0.1< d ≤0.5
μm
0.5< d ≤1.0
μm
1.0< d ≤5.0
μm
°C °F
0 As specified by the equipment user or supplier and more stringent than class 1
1 ≤ 20000 ≤ 400 ≤ 10 ≤ -70 ≤ -94 ≤0.01
2 ≤ 400000 ≤ 6000 ≤ 100 ≤ -40 ≤ -40 ≤0.1
3 not specified ≤ 90000 ≤ 1000 ≤ -20 ≤ -4 ≤1
4 not specified not specified ≤ 10000 ≤ +3 ≤ +37.4 ≤5
5 not specified not specified ≤ 100000 ≤ +7 ≤ +44.6 -
6mass concentration: 1 - 5 mg/m3≤ +10 ≤ +50 -
Terms and definitions
Particle: small discrete mass of solid or liquid matter
Particle size d : length of the greatest distance between two external boundaries
Dew point: temperature at which water vapour begins to condense
Pressure dew point: dew point of the air at the specified pressure
A desiccant dryer will be needed to reduce the dew point down to -40 °C (-40°F).
The air purity according to ISO 8573-1:2010 is expressed as follows: class [X.Y.Z], where X, Y
and Z are respectively the purity classes with regard to dust, water and oil.
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A few examples are given in the image below.
A General purpose protection
With grade P filter: air quality to ISO 8573-1: class 4:-:3
With grade G filter: air quality to ISO 8573-1: class 3:-:3
B High quality air with reduced dew point
(air quality to ISO 8573-1: class 1:4:1)
C General purpose protection and reduced oil concentration
(air quality to ISO 8573-1: class 1:-:2)
D High quality air with extremely low dew point
(air quality to ISO 8573-1: class 2:2:1)
E High quality air with extremely low dew point
(air quality to ISO 8573-1: class 1:2:1)
F Upper class quality air with reduced dew point
(air quality to ISO 8573-1: class 2:4:2)
G Upper class quality air with extremely low dew point
(air quality to ISO 8573-1: class 2:2:1)
H Upper class quality air with extremely low dew point
(air quality to ISO 8573-1: class 1:2:1)
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Components shown in above image
Item Description Item Description
1 Compressor with after cooler 6 D filter
2 G filter (or P filter in configuration A) 7 Refrigerant dryer
3 C filter 8 Desiccant dryer
4 V filter (for critical applications) 9 Compressor with integrated dryer
5 S filter 10 VT filter
Compressed air may come into direct or indirect contact with food. When this happens, for
example during production or processing, this requires a much higher level of contaminant
control. Particular attention needs to be given to contaminants added during the compression and
the distribution process, such as bread packaging, fluidized bed in the transfer of flour from a
tanker etc.
Recommendations:
• No contact: Air purity class ISO 8573-1:2010 [1:4:1]
• Contact: Air purity class ISO 8573-1:2010 [1:2:1]
The filters comply with the bacteriological filtration grade and the British Compressed Air Society
(BCAS) Food Grade Compressed Air Code of Practice.
3.4 ISO 12500
ISO 12500
ISO 12500 has been introduced specifically to test purification equipment for compressed air and
complements ISO 8573.
ISO 12500 currently consists of:
• Part 1: Oil aerosol filters
• Part 2: Oil vapor filters
• Part 3: Particulate filters
• Part 4: Water removal
ISO 12500-1:2007 - Testing of Coalescing filters
ISO 12500-1:2007 provides a set of standardized conditions with which coalescing filters should
be tested in order to show their filtration performance in accordance with ISO 8573-1:2010. The
testing will provide the user with an oil aerosol carry-over figure in mg/m3 and saturated (or wet)
pressure drop in mbar. This is the filter performance at the reference conditions and can be used
for benchmarking purposes.
ISO 12500-3:2009 - Testing of Dust removal filters
ISO 12500-3:2009 provides a guide for choosing an appropriate method of determining the solid
particulate removal efficiency rating by particle size. Measurement methods are recommended
based on the size range of the particulates that the filter being tested has been designed to
remove. The test is performed as a type-test on filters as being representative of a range.
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4 Maintenance
4.1 Maintenance
When maintaining the filter, keep in mind the following:
• On filters with manual drain valve, open the latter at regular intervals to evacuate collected
dust or liquid.
• In case an automatic drain valve or a solenoid timer drain is installed, manual draining can
be carried out by opening the valve counterclockwise to release collected condensate.
When the filter has to process air with a temperature higher than the specified maximum
temperature, the filter's lifetime will be reduced considerably!
4.2 Filter element change
The hand-tool icon on the figure indicates the items provided in a dedicated filter kit.
1. Before filter element change, check for any leakages at the bottom of the filter bowl
(connection of manual and automatic drain) during normal filter operation. If no leakage is
observed, point 6 up to 9 can be discarded.
2. Isolate the filter from the air net.
3. Depressurize the filter by turning the connection nipple of the automatic drain valve
counterclockwise or by opening the manual drain valve.
4. Unscrew the bowl.
5. Discard the filter element.
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