Almatec CXM Series User manual

OPERATING AND INSTALLATION INSTRUCTIONS
Air-Operated Diaphragm Pumps
made of conductive Polyethylene
CXM
Series
Special Pump CXM 20 FES-X02
Original Instruction
Read carefully before pump installation

2
CONTENTS
Page
Introduction ....................................................................................... 3
General description of the machine, appropriate use
and residual dangers ………………………………………………………………………………….. 3
Storage and long-term usage ....................................................................................... 3
Code system ....................................................................................... 4
Operation in explosion proof areas ....................................................................................... 5
Special Operations Conditions ………………………………………………………………………………… 5
Atex Marking for Gases and Dusts in Accordance to 2014/34/EU ……………………………………………….. 6
Technical data ....................................................................................... 7
Performance charts ....................................................................................... 7
Dimensions ....................................................................................... 8
Installation ....................................................................................... 9
Recommended installation ....................................................................................... 9
Start-up operation ....................................................................................... 12
Torque values ....................................................................................... 10
Safety instructions ………………………………………………………………………………….. 10
Using as submersible pump ....................................................................................... 12
Additional temperature hints ....................................................................................... 12
Disassembly and assembly advises ....................................................................................... 13
Trouble shooting ....................................................................................... 14
Spare part list ....................................................................................... 16
Exploded views ....................................................................................... 17

3
INTRODUCTION
ALMATEC air-operated diaphragm pumps are constructed according to the state of the art and they are reliable.
Imminent danger by operating error or misuse can lead to damages of properties and/or persons. The pumps are to be
applied for the intended use and in a safety-related proper condition only.
Each person working on the ALMATEC air-operated diaphragm pumps concerning installation, start-up, handling or
maintenance has to read this manual completely and in an attentive way and has to follow all mentioned procedures
and safety notes.
GENERAL DESCRIPTION OF THE MACHINE, APPROPIATE USE AND RESIDUAL DANGERS
The ALMATEC CXM pumps are oscillating positive displacement pumps and are based
on the functional principle of double diaphragm pumps. The basic configuration
consists of two external side housings with a center housing between them. Each of the
side housings contains a product chamber which is sealed against the center housing
by a diaphragm. The two diaphragms are interconnected by a piston rod. Directed by
an air control system, the diaphragms are alternately loaded with compressed air so
that they move back and forth. In the first figure, the compressed air has forced the
left-hand diaphragm towards the product chamber and displaced the liquid from that
chamber through the open valve at the top to the discharge port. Liquid is
simultaneously drawn in by the right-hand diaphragm, thus refilling the second product
chamber. When the end of the stroke is reached, it reverses automatically, and the
cycle is repeated in the opposite direction. In the second figure, liquid is drawn in by
the left-hand diaphragm and displaced by the right-hand diaphragm.
The appropriate use of an Almatec air-operated diaphragm pump refers to the liquid transport taking into account the
operation parameter mentioned in this manual and in compliance of the given terms for commissioning, operation,
assembly, disassembly and maintenance.
Even if all necessary safety measures described in this manual have been met, a residual danger exists by leakages or
mechanical damages. At sealing areas or connections liquid can be released uncontrollably then.
STORAGE AND LONG-TERM USAGE
In general, the ALMATEC pump is delivered operational and packaged. If the unit is not installed right away, proper
storage conditions are important for a trouble-free operation later. The pump must be protected from wetness,
coldness, dirtying, UV-radiation and mechanical influences. The following storage conditions are recommended:
- Steady ventilated, dust and vibration free storage room
- Ambient temperature between 15°C and 25°C with a relative humidity below 65%
- Prevention of direct thermal influences (sun, heating)
Plastic materials are subject to aging processes depending on material, surrounding conditions and application
parameters. Chemical contact and/or increased temperature can amend material characteristics on the long run,
especially mechanical capabilities. For safety reasons, we do therefore recommend as part of every maintenance (resp.
in case of no maintenance till then after two years and then every six month): A careful visual check of all pump parts
for visible damages, a tactile check of all sealing surface (e.g. by moving a finger along the surface after cleaning), a
shape-check of the housing parts (e.g. by laying a drawer on plain surfaces) and a movability check of all threads. Any
eventually damaged part needs to be replaced!

4
CODE SYSTEM
PSG Germany GmbH is certified as a modern, quality-orientated enterprise according to DIN EN ISO 9001 and 14001.
Before release for dispatch, any pump must undergo an extended final control.
As a general rule in the countries of the EU only such machines are allowed to take into operation, which are determined
to meet the regulations of the EU machinery directive, the harmonized standards, European standards and the
respective national standards. Hence the operator must verify whether the ALMATEC pump manufactured and
delivered properly according to the customer’s order meets the mentioned requirements.
Therefore, make sure, before putting the pump into operation, that the pump and the used materials of construction
are suitable for the provided application and the installation site. To check this, the exact pump code is required. This
code, the serial number and the year of construction are noted on the identification plates on the pump itself.
Example to clarify the ALMATEC CXM pump code:
CXM 50 F E S -X02
Special design: without tension discs but with customized housing bolts
Type and material of valves: S Valve balls, SS
Material of diaphragms and o-rings: E EPDM
Housing material: F Conductive Polyethylene
Pump size, capacity in l/min
ALMATEC air-operated double diaphragm pump, CXM series

5
OPERATION IN EXPLOSION-PROOF AREAS AND FOR FLAMMABLE LIQUIDS
X= CAUTION! = Special operating conditions apply!
For pumping flammable liquids or in Ex-areas, only pumps with housing parts and internals made of
conductive plastic may be used. Air-operated diaphragm pumps of the CXM series with housing code F (PE
conductive) meet this requirement. They must generally be grounded via a connection on the right
sidehousing [1]. The ground connection must have a minimum cross-section of 6 mm2. All other housing
parts are conductive and connected to each other.
ALMATEC air-operated diaphragm pumps made of electrically conductive PE/PTFE are suitable for use in
potentially explosive atmospheres of category 2 and 3 ("Zone 1" and "Zone 2" respectively), atmosphere
G/D, which are subject to the scope of EU Directive 2014/34/EU. Conductive diaphragms (material code
68, 70, 72) can be used without restriction for pumping liquids in all explosion groups. If non-conductive
diaphragm materials are used (material code 67, 98), explosion group IIB applies within the pump for
pump size CXM 10 up to including CXM 135 (regardless of the installation site).
Pipelines and product connections must be grounded separately. To avoid ignition hazards, the formation
of dust deposits on the units must be prevented. Repairs in hazardous areas may only be carried out after
careful examination of the feasibility and only with appropriate tools and by trained specialist personnel.
The ATEX marking according to Directive 2014/34/EU can be found in the enclosed Declaration of Conformity
and the corresponding sticker on the pump or damper.
The interfaces for electrical accessories have been considered and do not represent a new potential ignition
source.
The type of protection "c = design safety" was applied in accordance with guideline EN ISO 80079-37.
SPECIAL CONDITIONS
CXM 20 FES-X02
Permissible ambient temperature (°C) [F]
-10 –50 [14 –122]
Permissible temperature of driving air (°C) [F]
0 –50 [32 –122]
Maximum driving/operating pressure (bar) [psi]
7 [101]
Maximum driving/operating temperature (X):
PE(°C) [F]:
70 [158]

6
ATEX MARKING FOR GASES AND DUSTS IN ACCORDANCE TO 2014/34/EU
In order to enable the optimum and flexible design of an ATEX pump to the customer-specific application,
a differentiation is made in the marking between the installation location of the pump (hazardous area
outside the pump) and the inside of the pump (hazardous area inside the pump).
Equipment category G (gases, mists, vapors)
Installation site: Category G
Inside the pump: Category G
Conductive ALMATEC air-operated diaphragm pumps may generally be used in explosion group IIC at the
installation site (potentially explosive area outside the pump), since the solid housings are made of
dissipative materials and the entire pump is grounded.
ATTENTION! Inside the pump, the permitted explosion group varies depending on the diaphragm material
used:
When using non-conductive diaphragms, explosion group IIB applies inside the pump:
II 2/2 G Ex h IIB/IIC T6…T4 Gb/Gb X (inside the pump/installation site)
When using conductive diaphragms, explosion group IIC applies inside the pump:
II 2/2 G Ex h IIC/IIC T6…T4 Gb/Gb X (inside the pump/installation site)
Equipment category D (dusts)
Installation site: Category D
Inside the pump: Category G
Conductive ALMATEC air-operated diaphragm pumps may generally be used in dust group IIIC at the
installation site (potentially explosive area outside the pump; equipment category D).
ATTENTION! Inside the pump (equipment category G), the approved explosion group varies depending on
the diaphragm material used:
When using non-conductive diaphragms, explosion group IIB applies inside the pump:
II 2/2 D Ex h IIB/IIIC T 70°C…130°C Gb/Db X (inside the pump/installation site)
When using conductive diaphragms, explosion group IIC applies inside the pump:
II 2/2 D Ex h IIC/IIIC T 70°C…130°C Gb/Db X (inside the pump/installation site)

7
TECHNICAL DATA
NPT port connections
CXM 20
FES-X02
Dimensions, mm (in.): length
width
height
124 (4.9)
151 (5.9)
123 (4.8)
Nominal port size NPT
Air connection BSP
1/2“
1/4”
Weight, kg (lb)
1.8 (3.8)
Max. particle size of solids mm (in.)
for pumps with ball valves
2 (0.08)
Suction lift dry, mWC (ft):
Suction lift wet, mWC (ft)
1 (3.3)
8 (26.3)
Maximum driving/operating pressure (bar) [psi]
7 [101]
Maximum driving/operating temperature (X): PE(°C) [F]:
70 [158]
Sound pressure level acc. to DIN 45635,
part 24, depending on the operating data
[dB (A)]: driving pressure 3 bar
driving pressure 5 bar
driving pressure 7 bar
68-70
71-73
72-75
PERFORMANCE CHARTS
The data refer to water (20°C/68°F), under using of a compressor Atlas Copco VSG30 and calibrated measuring
equipment. The specified performance data are warranted by ALMATEC in accordance with DIN EN ISO 9906.

8
DIMENSIONS in mm

9
INSTALLATION
Recommended installation
Start-up operations
In general, the pump has to be connected load free. Neglecting this causes leakage and maybe even damages. To avoid
vibrations, pulsation dampers and compensators are recommended. Before connecting the pump, take the blind plugs
out of all connections. The connections of ALMATEC CXM pumps have slightly tapered threads. Use threadseal only
sparingly, otherwise the connections could be damaged.
Port positions CXM pumps with NPT product connections (pump sizes 10/20/50/130)
On delivery, the liquid connections of all CXM pumps are situated as follows:
Suction port “face side horizontal”, discharge port “upper side vertical” (see illustration)
By turning the center block by 180° by its longitudinal axis –after unscrewing and taking out the housing
bolts –the configuration can be changed to:
Suction port “underside vertical”, discharge port “face side horizontal”
The operator is responsible for an adequately stability and an appropriate fixation of the piping according to the state
of the art. To facilitate the installation and maintenance shut off valves should be installed right before and after the
pump.The nominal width of the connection pipes has to be chosen in accordance to the connections of the pump. A
smaller piping can cause cavitation (suction line) as well as a loss of performance (suction and discharge line). In case
the pipe is too big, the dry suction capacity of the pump can decrease. Seal the suction line diligently; hosepipes should
be suitably armoured. A suction line continuously rising will prevent the formation of air locks in the line which would
affect the suction lift.
The air inlet is located at the front of the pump in the middle of the center housing [2]. When delivered it is covered by
a bilingual sticker with safety instructions, which can be easily removed. Before installation make sure that the air
supply pipe is free of solids. To supply the pump with driving air sufficiently, the pipe diameter should match the size
of the air inlet. Take care that no dirt or particles can intrude into the pump during the connection, as these can
accumulate inside the pump and can cause malfunctions. The integrated air control system PERSWING P®is a precision-
control that requires oil-free, dry and clean compressed air for optimal function. If humidity is expected, a water
separator or air dryer has to be fitted to protect the pump from blocking by ice. The ideal condition is the dewpoint of
air at -20°C. In humid surroundings, icing from the outside may occur despite the driving air is dried. If so, a prolonged
waste-air-exhaust (ca. 500 mm by pipe or hose) can be helpful. When installing the pump into boards or cabinets, it

10
has to be ensured that cold air does not get caught behind the muffler. In applications with a tendency to freezing at
the waste air exhaust, good experiences in practise have been achieved by pre-heating the driving air to increase the
distance to the dew point of the air. Doing so, it has to be considered that the driving air temperature generally may
not exceed 50°C to avoid expansion and sticking effects on the air side. This max. air temperature is a well valid when
using a compressor producing warm air which is e.g. often true for truck compressors.
The pressure of the driving air should be limited to the amount required to meet the performance needed. Excessive
pressure increases both the air consumption and the wear of the pump. The pump is regulated by tuning the flow rate
of the air. For a proper operation at the lower performance range the regulation via a needle valve is recommended.
An empty pump has to be driven slowly (e.g. via a needle-valve). The pump starts automatically. Pumps of the CXM
series are self-priming when dry, thus it is not necessary to fill the suction line of the pump. During slow operation of
the pump the dry suction lift is better than during high stroke frequency. The suction lift capacity of a liquid-filled pump,
however, is much higher. The pump is appropriate for running dry during slow operation. Dry running at high stroke
frequency causes premature wear.The pumps can briefly (up to max. one hour) be operated against a closed discharge
line. Throttling on the suction side may damage the pump. When the pump operation has been stopped by a closed
discharge, the pressure equilibrium of the diaphragms must be ensured. This can be achieved by keeping the pump
connected to the air supply pressure; for longer stoppage, the pump must be released from the pressure within the
system on both fluid side and air supply side.
Torque values
Size
CXM 20 FES-X02
Torque values for housing bolts (Nm)
4
Safety instructions
•Installation, operation, and maintenance by qualified staff only.
•Before putting the pump into operation as well as after some hours of pumping, the housing bolts
[9] have to be fixed according to the torque data. Fixing the bolts is necessary as well after longer
periods of stoppage, at extreme temperature variations, after transport and dismantling the pump.
In case of temperature varying between extremes or high temperature difference between the
liquid and the surrounding, the housing bolts should be controlled more frequently (interval
proposals are available on request).
•Before start-up of the pump anyone should acquaint oneself with the explanations of the chapter
troubleshooting (see pages 14/15). Only by this the defect quickly can be realized and eliminated in
case of trouble. Problems which cannot be solved or with an unknown reason should be passed on
to the manufacturer.
•Before any maintenance and service procedures arising on the pump or on the optional
equipments, the complete installation has to be turned off and protected against accidental turn on.
This is possible by a lockable emergency stop for the air supply of the pump. Additional a danger
sign against restart should be attached.
•Pressure tests of the plant a pump is included in may only be carried out with the pump
disconnected from the pressure on both ports or by using the pressure the pump develops while
operating. The load of a pressure in the plant may damage the pump.
•AODD pumps must not be operated with a positive suction pressure.
•Depending on the conditions of operation, the liquid conveyed might escape from the pump
through the muffler in case of a diaphragm rupture (in this case muffler has to be replaced). For
further safety requirements the optional equipment diaphragm monitoring and barrier chamber
system are recommended.
•In case of a diaphragm rupture, it might be possible for the fluid pumped to intrude into the air side
of the pump. In very adverse conditions - e.g. pressure within the fluid system during stopped air
supply - the fluid might as well find its way into the air supply lines. To protect other devices like
pulsation dampers or even pneumatic valves, it is recommended to protect the air supply line
accordingly, e.g. via a non-return valve. This would as well avoid polluting the air supply line.
•The state of the muffler has to be inspected regularly, as a blocked muffler can be forced out of the
pump. If this happens, damages of properties and/or persons cannot be excluded.

11
•If the product tends to settle, the pump has to be flushed regularly. For larger solids a filter has to
be installed in the suction line.
•In case of delivery of hot liquids the wetted pump must not standstill for a longer time, because it
could lead to temporary leaks in the valve area and to a blockade of the air control system.
•The relevant effective security advises have to be respected.
•Pools of liquid which appear in the near outer area of the pump have to be inspected on danger
potential, if necessary safety measures are to be taken.
•Chemical and biological reactions in the product chamber of the pump (mixture of different
substances) and the freezing of the liquid have to be avoided.
•Before starting to disassemble the pump, take care that the pump has been emptied and rinsed.
Both ports piping are to be closed and drained if applicable. Further the pump has to be cut off from
any energy on the air and product side. If the pump is being deported from the plant, a reference
about the delivered liquid has to be attached. A template is available on the Almatec website.
•Please respect the relevant additional security advices, if the pump has been used for aggressive,
dangerous or toxic liquids (e.g. suitable protective equipment according to the safety data sheet of
the liquid). In case of a diaphragm rupture, it is possible that residues of the liquid remain behind
the diaphragms, in the area of the air control system and at the muffler, despite of several flushing
processes. Hence, appropriate safety equipment according to the safety data sheet of the liquid is
indispensable.
•Additional advice for handling sensitive Fluids: With correct material choice, all wetted parts inside
the pump are made from materials appropriate for your fluid - selected types as well for for food
contact. A malfunction, however, might result in a contact of the fluid to components that are non-
wetted during normal operation (e.g. inside the air section). Therefore, we recommend as usual for
pumps, to discard the batch after a malfunction when handling sensitive fluids. Please consider that
a conformity for food-contact solely refers to wetted materials themselves, NOT to a “Hygienic
Pump Construction”.
•Before putting the pump back into operation, the tightness of the pump has to be checked.
•Air-operated diaphragm pumps can lead to bruises when lifting, sinking or assembling them.
Appropriate accessories and safety equipment are to be used. Big and heavy modules have to fixed
and secured to lifting gears when transporting/replacing them.
•Especially when deliver critical liquids, wear parts, like diaphragms, should be replaced within a
preventive maintenance.
•The use of non-original ALMATEC spare parts and structural changes lead to the lapse of the
warranty immediately. When operating such a pump, damages of properties and/or persons cannot
be excluded.
•The operation of the pump with nitrogen as driving gas is possible. In closed rooms sufficient
ventilation must be provided.
•Possible electrical connections (e.g. when using optional equipment with controllers) may be
executed by a qualified person only. The regulations of the respective manufacturers are to be
followed.
•At any work arising it has to be made sure that no explosive atmosphere can appear. Appropriate
safety equipment is recommended.
•Procedure for pump return: According to the requirements of our 14001-certification, every unit
which is send to ALMATEC for diagnosis or maintenance reasons has to be accompanied by a filled
out decontamination-sheet. Otherwise a processing is not possible. The decontamination-sheet is
enclosed to this manual. Please pay attention to the further safety regulations.

12
Using as submersible pump
Consider the following advises when using a CXM pump as a submersible pump: When immersing an air- operated
diaphragm pump, it must generally be ensured that the waste air is deducted above the fluid level with a pipe or similar.
The pump must be located vertically upright to guarantee proper function. Minute leakage on the air inlet or outlet can
block the air valve. The pump must be disconnected from the pressure within the system during standstill. When
choosing the pump type, it must be taken into consideration that all external parts - even those non-wetted during
standard operation - like covers, shock absorbers, connections etc. must be resistant to the fluid pumped. Please
consider as well that depending on the material, the pump must be weight down resp. fixed.
Additional temperature hints
The temperature and pressure limitations listed on page 5 are solely based on mechanical temperature limits of the
housing material used. Depending on the fluid pumped, the maximum safe operating temperature of the housing
material can be reduced significantly.
A general aspect of lower temperatures is, that below 0°C (32°F) cold-brittling of the elastomers used within the pumps
can results in accelerated wear. Regarding the housing materials, please note that PE - other than PP - keeps its
mechanical strengths at low temperatures and PTFE keeps mechanically stable as well for an extended temperature
range. ALMATEC pumps of the CXM series can therefore be operated safely as well within low-temperature
installations: However, with liquids below 0°C (32°F) accelerated wear of internal parts has to be accepted. Moreover,
freezing, bogging or crystallisation of the fluid pumped must be avoided, especially within the pump.
Please consider, that viscosity and specific gravity of most fluids change with temperature (most often increasing at
lower temperature). Depending on the application, this fact may not only result in result in a reduced flow rate, the
pump may even be unable to prime the thicker and/or “heavier“ fluid any more.
In case of varying application temperatures, the housing bolt tension has to be controlled very thoroughly, as variations
like these can change the effective tension of the housing bolts via the different thermal expansion characteristics of
single.

13
DISASSEMBLY AND ASSEMBLY ADVISES
The general design of the ALMATEC CXM pumps is simple. A plastic tool designed for the mounting of the air control
system [22] is delivered along with every pump. Recommend tools are listed below. Please find the part number for
any part in the spare part list.
After loosening the housing bolts [12], the tension disc [4], the pump housings right hand [1] and left hand [3] can be
taken away from the center housing [2]. To remove the diaphragms, unscrew them one diaphragm [5] carefully
leftwards off the shaft [13] and pull the other diaphragm [5] together with the shaft [13] out of the center housing [2].
For CXM 50/55/130/135 only: Remove both parts of the shaft piston rings [15] from their grooves carefully (do not
damage the edges in the center block; a re-assembly of the same piston rings is impossible; they have to be replaced).
For taking out the PERSWING P®air control system [22], first unscrew both end caps using the plastic mounting tool.
Take out main and pilot piston, shove out the valve housing carefully using the tool as well. To install the air control
system [22] again, first screw in one end cap flushly into the center housing [2]. Insert one of the six o-rings, air-valve
housing [24] into the end cap from the inside. Moisture the four o-rings [24] of the air-valve housing with a bit of water
and push the housing into the center housing using the mounting tool. Take care that it slips in softly. Do never insert
the housing violently with a hammer. In case the housing cocks or hardly gets in, take it out again completely and start
again. Insert the main piston and the pilot piston. Lay the sixth O-ring [24] on the edge of the air-valve housing and
screw in the second end cap.
To re-install the diaphragms [5], fix one diaphragm onto the shaft [13] (for CXM 50/55 and CXM 130/135, first screw
the set screws, shaft [15] into the diaphragms [5] and tighten them beforehand). Shove it into the center housing and
fit the second diaphragm to the other end of the shaft. Adjust the bores in the center housing [2] to the diaphragms on
both sides (turn slightly backwards if necessary). The sealing surfaces of the diaphragms [5] and the pump housings
[1,3] have to be absolutely clean and undamaged; mere small scratches can cause leaking (if necessary, smoothen the
housing surfaces carefully with fine sandpaper). Moisture all o-rings for assembly, push them in carefully, do not bend
any ring.
When changing the product valves [9] take care that the axial boreholes of the valve housing [8] are completely aligned
with the holes in the side housings of the pump; check position after laying in the o-rings valve stop [11] and fixing the
valve stops [10].
Push the tension disc [4]) on the housing bolts [12] and fix the housing bolts crosswise evenly according to the given
torque values (see page 11).
Before putting the pump back into operation, the tightness of the pump has to be checked.
Only use original ALMATEC spare parts for repairs and / or preventive maintenance work. If this is not observed, the
CE and ATEX markings, the declaration of conformity (s) and the guarantee claim for the pump will expire.
All work on the pump may only be carried out with the appropriate tools and by trained specialist personnel.

14
TROUBLESHOOTING
Malfunction
Possible Reason
Solutions/Remarks
pump does not operate
air supply line blocked/closed
muffler blocked
working chambers blocked
air control system defective
discharge line blocked/closed
open air supply
clean/replace muffler
remove blockage
replace air valve system
clean/open line
pump operates unsteadily
piston rings worn
air control system worn
diaphragm rupture
air control system soiled
check valve blocked
icing
replace piston rings
replace air control system
replace diaphragm, clean pump
clean/replace air control system
cleaning, removal of bulk particles
improve air processing
air within liquid
suction line leaky
container with liquid empty
diaphragm rupture
cavitation
seal suction line
fill/new container
replace diaphragm
adapt suction lift, possibly install
suction pressurised air chamber
insufficient discharge pressure
insufficient pressure/amount of
driving air
air supply line leaky
air control system leaky
check valve worn
more air consuming components
increase air supply
check/repair air supply
replace air control system
check/replace check valve
increase pressure/amount of air
output decreases
air control system soiled
icing
air pressure drop
suction line/inlet strainer soiled
discharge line/outlet strainer soiled
muffler blocked
check valve worn
change in viscosity
more air consuming components
clean/replace air control system
improve air processing: dryer/filter
ensure sufficient supply of air
cleaning
cleaning
replace the muffler
replace valve
change back/adjust pump
increase pressure/amount of air
pump stops itself
icing of the air control system
air pressure to low
air pressure drop
discharge line blocked
air filter blocked
valve closed
air control system defective
wear/leaking of air control system
diaphragm rupture
check valve blocked/worn
improve air processing: dryer/heater
etc.
increase air pressure
ensure sufficient air supply
clean discharge line
clean air filter
open valve
replace air control system
replace air control system
replace diaphragm, clean pump
clean/replace check valve

15
Malfunction
Possible Reason
Solutions/Remarks
pumps operates, however suction
capacity insufficient
pump operates too fast
operation beyond physical limits
cavitation
operation beyond pump capacity
air cushion within suction/discharge
line
dry suction against discharge
pressure
valve filter within suction line closed
valve filter within discharge line
closed
container with liquid empty
vacuum inside the container
wear of the check valves
suction line leaky
suction line blocked
air pressure cushion at discharge
check valve blocked
start more slowly
adjust installation
check, cool down
adjust installation resp. install bigger
pump
bleed the line
wet pump, start without pressure
open valve/clean filter
open valve/clean filter
fill/new container
bleed container
replace valves
seal suction line
clean suction line
bleed discharge line
clean/replace valve
insufficient suction capacity after
pump repair
connections tighten incompletely
check valves inserted falsely
tighten/seal connections
correct positioning of check valves
diaphragm overstrained
pressure within the plant/system
inadmissible vacuum
icing
ensure that pressure is only
developed by the pump itself, check
plant/valves,
replace diaphragms
check suction line, open valve
improve air processing
leaking between housing parts
housing bolts loosened
O-rings sleeve damaged
diaphragms attacked chemically
diaphragms overstrained
tension installation/pipework
tighten bolts, check pump
replace O-rings
replace diaphragms
replace diaphragms
loosen, eliminate tension,
use of a compensator
muffler grey
driving air too humid, icing
improve quality of driving air
muffler black
soiled, oily air
improve quality of driving air,
install sensitive filter in suction line
pump is connected to air but does
not operate
air control system blocked
bulk particles/dirt
chemical influence (O-rings swollen)
valve closed in discharge line
clean/replace air control system
clean pump, replace necessary parts,
improve air quality
check, replace damaged parts
open valve
liquid leaves the pump via the
muffler
diaphragm rupture
replace diaphragms,
clean pump

16
SPARE PART LIST
Pump size
CXM 20 FES-X02
Item
Qty.
Description
Material
Part number
1
1
Pump housing, right hand
PE conductive
11 15 010 55
2
1
Center housing
PE conductive
11 15 040 55
3
1
Pump housing left hand
PE conductive
11 15 011 55
4
2
Tension disc
1.4301
7 10 008 22
5
2
Diaphragm
EPDM
1 10 031 72
6
4
Sleeve
PE conductive
4 15 312 55
7
4
O-ring, sleeve (code FE.)
EPDM
9 14 617 72
8
2
Valve housing
PE conductive
11 15 014 55
9
4
Valve ball (code F.S)
Stainless steel
4 15 032 22
10
2
Valve stop
PE conductive
11 15 017 55
11
2
O-ring, valve stop (code FE.)
EPDM
9 20 602 72
12
*
Housing bolt, cpl.
1.4305
4 15 220 22
13
1
Shaft
1.4301
2 08 030 22**
14
2
Set screw, shaft
1.4305
-
15
2
Shaft piston ring, cpl.
PTFE
-
16
1
Muffler
PE
4 15 044 51
17
4
Shock absorber
NR
1 15 022 85
22
1
PERSWING P® air control system, cpl.
PETP
2 08 001 84
24**
6
O-ring, air valve housing
NBR
9 26 519 71
** included in item 22
All parts in italics are not product wetted.
When ordering please state the serial number of the pump.

17
EXPLODED VIEWS

18
Notizen

19

20
Subject to change without notice, 2021/07
PSG Germany GmbH
Hochstraße 150-152 · 47228 Duisburg · Germany
Telephone [phone] / 89 2 05 - 0 · Telefax +49 (0) 20 65 / 89 2 05 - 40
http://www.psgdover.com · e-mail: [email protected]