VERDER VERDERAIR E-PURE ATEX User manual

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OPERATION MANUAL VERDERAIR E-PURE ATEX_v1
The most efcient electric diaphragm pumps
VERDERAIR E-PURE ATEX

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VERDERAIR E-PURE ATEX_v1 | 30.10.2023 2
TABLE OF CONTENTS
Pump Matrix 3
ATEX 4
Warnings 4
Installation 7
Electrical Connections 8
Operation 11
Maintenance / Repair 12
Troubleshooting 18
Parts & Kits 19
Exploded Views 20
Dimensions 21
Technical Data 25
Torque Values 26
Drive Options 26
Optional Equipment 26
Customer Services & Guarantee 27

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PUMP MATRIX
Before putting your pump in operation remove
all packing materials after reception. Check the
consignment for damage at once and make
sure that the name plate / type designation is in
accordance with the packing slip and your order.
All pumps have identication plate (ID) located
on the pump housing. The ID is mentioning the
year of construction, the serial number and the
construction code of the pump.
Use the matrix below to dene the components
of your pump. Make sure the wetted parts of the
pump are compatible to the pumped liquid.
NOTE:
In case of doubt, please contact your local supplier
(www.verderliquids.com). To build a pump code,
please see the below coding system.
PUMPCODING VA-EP ATEX
Pump size Housing and center Section Shafts & diaphragm plate Valve
Housing Drive section -
30 : 3/4" G: PE-Conductive A : Aluminum + PE-C SS : Stainless steel 316L FP : Flapper PEEK
50 : 3/4" DS : Duplex ss
100 : 1 1/4" HS : Hastelloy C
Diaphragm Connections Options
TO : PTFE
Overmolded
(non-codictive)
TN : Threated NPT
TB : Threated BSPP
FD-S: Flange DIN in
SS304
FD : Full steel ange
DIN in SS316
X3: ATEX AC drive 230/400V 50Hz.
XI: Gearbox ATEX i=7.5 ange IEC80.
OO : standard, right suction port
LP : left suction port
LX: leak detection, ATEX sensor
DM: Draining manual
Example : VA-EP100GA SS FP TO TN X3OO
Notes:
- Not all combinations are available, contact your
local supplier for more info.
STORAGE
If the pump is not installed immediately it is
recommended to store it in a dry, clean and cool
location. Verderair e-Pure pump is tested with
water as liquid according to the test report.
Note: Rest water from the test may stay behind in
the pump.
II 3G Exh IIC T3 Gc

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ATEX
For use in Atex environments, pumps in conductive
plastic and aluminum drive housing have to be
used. All pumps made of conductive Polyethylene
and aluminum (pump code VA-EPxx GA) are ATEX
certied: II 3G Exh IIC T3 Gc. The pumps have to
be grounded following the instructions on page 10.
When using non - conductive diaphragms,
the following protective measures have to be
taken into account: Pumped liquid must be
conductive or soluble in water. Possible pumping
of ammable liquids with high conductivity (>1000
pS/m). Proper earthing of the unit required,
limitation of dry running Dry running have to be
prevented by means of monitoring systems which
are placed in the pump system.
WARNINGS
The following warnings are for the setup, use,
grounding, maintenance, and repair of this
equipment. The exclamation point symbol alerts
you to a general warning and the hazard symbol
refers to procedure specic risk. When these
symbols appear in the body of this manual, refer
back to these warnings. Additional, product-
specic warnings may be found throughout
the body of this manual where applicable.
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper, setup, or usage of the system can cause electric
shock.
Turn off and disconnect power at main switch before disconnecting any cables before
servicing or installing equipment.
Connect only to grounded power source.
All electrical wiring must be done by a qualied electrician and comply with all local codes
and regulations.
Wait ve minutes for capacitor discharge before opening equipment.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode.
To help prevent re and explosion:
Use equipment only in well ventilated area.
Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and
plastic drop cloths (potential static arc).
Keep work area free of debris, including solvent, rags and gasoline.
Do not plug or unplug power cords, or turn power or light switches on or off when ammable
fumes are present.
Ground all equipment in the work area. See grounding instructions.
Use only grounded hoses.
If there is static sparking or you feel a shock, stop operation immediately.
Do not use equipment until you identify and correct the problem.
Keep a working re extinguisher in the work area.
Static charge may build up on plastic parts during cleaning and could discharge
and ignite ammable materials and gases. To help prevent re and explosion:
Clean plastic parts in a well ventilated area.
Do not clean with a dry cloth.
WARNING

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WARNING
PLASTIC PARTS CLEANING SOLVENT HAZARD
Use only compatible water-based solvents to clean plastic structural or pressure-containing
parts. Many solvents can degrade plastic parts and cause them to fail, which could cause
serious injury or property damage. See Technical Data in this and all other equipment
instruction manuals. Read uid and solvent manufacturer’s warnings.
TOXIC FLUID OR FUMES HAZARD
Toxic uids or fumes can cause serious injury or death if splashed in the eyes or on skin,
inhaled, or swallowed.
Read MSDS’s to know the specic hazards of the uids you are using.
Route exhaust away from work area. If diaphragm ruptures,
uid may be exhausted with air.
Store hazardous uid in approved containers, and dispose of it according
to applicable guidelines.
Always wear impervious gloves when cleaning equipment.
BURN HAZARD
Equipment surfaces and uid that’s heated can become very hot during operation. To avoid
severe burns:
Do not touch hot uid or equipment.
Wait until equipment/uid has cooled completely.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing,
or when in the operating area of the equipment to help protect you from serious injury,
including eye injury, inhalation of toxic fumes, burns, and hearing loss.
This equipment includes but is not limited to:
Protective eyewear, gloves, and hearing protection
Protective clothing
ALUMINUM PARTS HAZARD
Use of uids that are incompatible with aluminum equipment can cause serious
chemical reaction and equipment rupture. Failure to follow this warning can result in death,
serious injury, or property damage.
Do not allow aluminum parts to come into contact with the following substances:
1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or uids
containing such solvents.
Do not use chlorine bleach.
Many other uids may contain chemicals that can react with aluminum.
Contact your material supplier for compatibility.

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EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
Do not operate the unit when fatigued or under the inuence of drugs or alcohol.
Do not exceed the maximum working pressure or temperature rating of the lowest rated
system component. See Technical Data in all equipment manuals.
Use uids and solvents that are compatible with equipment wetted parts. See Technical Data
in all equipment manuals. Read uid and solvent manufacturer’s warnings. For complete
information about your material, request MSDS from distributor or retailer.
Do not leave the work area while equipment is energized or under pressure.
Turn off all equipment and follow the Pressure Relief Procedure in this manual when
equipment is not in use.
Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
Do not alter or modify equipment.
Use equipment only for its intended purpose. Call your distributor for information.
Route hoses and cables away from trafc areas, sharp edges, moving parts, and hot
surfaces.
Do not kink or over bend hoses or use hoses to pull equipment.
Keep children and animals away from work area.
Comply with all applicable safety regulations.
PRESSURIZED EQUIPMENT HAZARD
Fluid from dispense valve, leaks, or ruptured components can splash in the eyes or on skin
and cause serious injury.
Follow Pressure Relief Procedure in this manual, when you stop the pump
and before cleaning, checking, or servicing equipment.
Tighten all uid connections before operating the equipment.
Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
THERMAL EXPANSION HAZARD
Fluids subjected to heat in conned spaces, including hoses, can create a rapid rise in
pressure due to the thermal expansion. Over-pressurization can result in equipment rupture
and serious injury.
Open a valve to relieve the uid expansion during heating.
Replace hoses proactively at regular intervals based on your operating conditions.
WARNING
MPa/bar/PSI
MPa/bar/PSI

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INSTALLATION
NOTE: Installation of this equipment involves
potentially hazardous procedures. Only trained
and qualied personnel who have read and who
understand the information in this manual should
install this equipment.
• All electrical wiring must be done by a qualied
electrician and comply with all local codes and
regulations.
General Information
The typical installation is only a guide for selecting
and installing system components. Contact
your Verder representative for assistance in
planning a system to suit your needs. Always use
genuine Verder parts and accessories. Be sure all
accessories are adequately sized and pressure
rated to meet the system’s requirements.
Reduce Cavitation
Cavitation in a double diaphragm pump is the
formation and collapse of bubbles in the pumped
liquid. Frequent or excessive cavitation can cause
serious damage, including pitting and early wear
of uid chambers, balls, and seats. It may result in
reduced efciency of the pump. Cavitation damage
and reduced efciency both result in increased
operating costs.
Cavitation depends on the vapor pressure of
the pumped liquid, the system suction pressure,
and the velocity pressure. It can be reduced by
changing any of these factors.
1. Reduce vapor pressure: Decrease the
temperature of the pumped liquid.
2. Increase suction pressure:
a. Lower the installed position of the pump relative
to the liquid level in the supply.
b. Reduce the friction length of the suction piping.
Remember that ttings add friction length to the
piping. Reduce the number of ttings to reduce
the friction length.
c. Increase the size of the suction piping.
d. Increase the Net Positive Suction Head
Available (NPSHa).
NOTE: Be sure the inlet uid pressure does not
exceed 25% of the outlet working pressure.
3. Reduce liquid velocity: Slow the cyclic rate of
the pump.
Pumped liquid viscosity is also very important but
normally is controlled by factors that are process
dependent and cannot be changed to reduce
cavitation. Viscous liquids are more difcult to
pump and more prone to cavitation.
Take all of the above factors into account in
system design. To maintain pump efciency,
supply only enough power to the pump to achieve
the required ow.
Verder representatives can supply site specic
suggestions to improve pump performance and
reduce operating costs.
Tighten fasteners before setup
Before using the pump for the rst time, check
and retorque the housing bolts (23). Also after the
rst day of operation, after periods of important
temperature uctuations, after transport, after
dismantling of the pump and after periods when
the pump hasn’t been working the stops, housing
bolts have to be checked. Please use the torque
values as mentioned on page 26.
PLEASE CHECK THE ADDITONAL DELIVERED EXPLODED VIEW FOR ALL POSITION NUMBERS

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Connection electric motor ATEX DOL operation
(Option X3): 230/400V AC 50Hz, 220-242V/380-
420V AC 50Hz. ∆/Y
NOTE: To avoid equipment damage, do not plug
the motor directly into a wall socket.
NOTE: Drive option X3 cannot be powered by an
inverter. ATEX DOL operation , read the motor
ID plate and the manufacturer's instructions.
Only the right connection of the drive ensures
that the pump operates in accordance with the
performance charts.
Wire Connections
Option X3:
NOTE: Ensure before connecting to the power supply
that the wired connection of the motor is correct
according to the markings on the motor plate:
Drives in version X3 are supplied with connection
(circuit High voltage (Y)).
All motors are equipped with Temperature Sensor
(TF): PTC-Thermistor, Drive option X3 must be
properly connected with the motor temperature
sensor to avoid possible overheating or burning!
The PTC temperature sensor only performs
its protective function when connected to a
trigger device! A triggering device evaluates the
resistance increase and switches the drive off.
Note: TMS when specifying time tA only with
PTC trigger device according to: II (2)G PTC DIN
44082
Pump with drive DOES NOT include cable and
plug!
Wiring guidelines
• The connection cables must be fed into the
terminal box using cable glands.
• The terminal box must be enclosed in a
dustproof and watertight manner.
• Use a grounded or shielded metal cable power
wiring.
• Use the shortest possible cables or wires of the
incoming power.
• Use the shortest possible cables or wires
between the controller and motor.
• Route low-voltage cables away from high-
voltage cables or wires or other known
electromagnetic sources of EMI interference. If
cables must cross, cross at a 90° angle.
ELECTRICAL CONNECTIONS
NOTE: Follow the instructions in the motor manufacturer’s manual. Use the main power switch with the
lockable position 0 to connect the electric motor. If you have pump with X3 option use overload protec-
tion. Wire size, fuse size, and other electrical devices must comply with all local codes and regulations.

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Recommended installation drawing

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Mounting
To avoid serious injury or death from toxic uid or
fumes:
Never move or lift a pump under pressure. If
dropped, the uid section may rapture. Always
follow the Pressure Relief Procedure on page 12
before moving or lifting the pump.
1. Be sure the mounting surface can support the
weight of the pump, hoses and accessories, as
well as the stress causes during operation.
2. Make sure the surface is at and that the pump
doesn’t wobble.
3. For ease of operation and service, mount the
pump so uid inlet and uid outlet ports are
easy accessible.
Grounding
The equipment must be grounded. Grounding
reduces the risk of static sparking and electric
shock. Electric or static sparking can cause
fumes to ignite or explode. Improper grounding
can cause electric shock. Grounding provides an
escape wire for the electric current.
Check your system electrical continuity after the
initial installation. Set up a regular schedule for
checking continuity to be sure proper grounding in
maintained.
Never use a non-conductive pump with non-
conductive ammable uids. Follow your local re
codes. When pumping ammable uids, always
ground the entire uid system as described.
Fluid suction line
1. A shut of valve should be installed just before
the pump to isolate the pump from the system
for maintenance and installation.
2. Always use a exible connection to avoid
vibrations being brought into the piping system.
The hoses should be grounded.
3. For sealing use an appropriate gasket
compatible with the connections of pump.
4. Use a suction line which can stand vacuum.
By the pumping action, vacuum will be created
at the suction side of the pump.
Fluid outlet line
1. A shut of valve should be installed just after
the pump isolate the pump from the system
for maintenance and installation. A drain valve
should be installed to relief the pressure of the
pump.
2. Always use a exible connection to avoid
vibrations being bought into the piping system.
The houses should be grounded.
3. For sealing use an appropriate gasket
compatible with the connections of the pomp.
Fluid inlet and outlet ports
1. VA-EP series of pump are having the suction
and discharge connections integrated in the
center block. The pumps are delivered as
standard with inlet port on the same side as
drive terminal box.
2. By changing the ports you need rotating vertical
the center housing 180°.
Installation remarks
1. VA-EP pumps must be installed load free
to avoid possible damage of pumps and/or
installation. There must be no external force on
any connection part of the pump. Be especially
careful not to have the pump support part of the
weight of the hose and the piping.
2. Use a sturdy hose that will not collapse under
the strong suction of the pump. The hose must
be of more than sufcient pressure rating.
3. Use a hose of a diameter the same as or larger
than the pump's ports. If the diameter of a hose
is smaller, it will affect the pump's performance
or cause its malfunction.
4. VA-EP pumps will be delivered with blind plugs
to prevent dust or other materials to enter the
pump. Those plugs have to be removed before
installing the pump.
5. As UV – radiation can damage Polyethylene. This
must taken in account by installing VA-EP pumps
made out of PE (pump code VA-EPxx EP)
6. VA-EP pumps are dry self-priming. So they don’t
need to be lled before rst use. The gures of
the possible suction heights can be found in the
technical information (see page 25).

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OPERATION
Flush the pump before first use
The pump was tested before leaving the factory.
Residue of the testing water can be left in the
pump. To avoid contamination, ush the pump
before rst use.
Starting and adjusting the pump
Before using the pump for the rst time, check
and retorque the housing bolts (23). Also after the
rst day of operation 8h, after periods of important
temperature uctuations, after transport, after
dismantling of the pump and after periods when
the pump hasn’t been working the stops, housing
bolts have to be checked. Please use the torque
values as mentioned on page 26.
1. Be sure the pump is properly grounded.
See page 10 for proper grounding.
2. Check ttings to be sure they are tight. Tighten
uid inlet and outlet ttings securely.
3. Place the suction tube in uid to be pumped.
4. Place the end of the uid hose into an
appropriate container.
5. Check that both suction and discharge valves
are opened.
6. Make sure that the inverter box is connected to
the appropriate power supply. Turn the OFF-ON
switch to the ON position.
7. Set the desired frequency on the frequency
regulator.
8. Press the start (run) button. Start the pump
slowly, during operation increase the capacity to
Max. till the moment liquid comes into the pump
and adjust the needed capacity.
9. If uid is not discharged after you start the
pump, or if you hear an abnormal noise or
notice any irregularity, shut down the pump
immediately.
10. If you are ushing, run the pump long enough
to thoroughly clean the pump and hoses.
Notice:
Excessive fluid inlet pressure can reduce
diaphragm life. Notice:
During operation of the VA-EP pump, it is
inadmissible to completely close the flow
on the pump discharge and stop the pump
in this way.

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Pressure Relief Procedure
Follow the pressure relief procedure whenever you
see this symbol.
This equipment stays pressurized until pressure
is relieved manually. To help prevent serious
injury from pressurized uid, such as splashing
in the eyes or on skin, follow the Pressure Relief
Procedure when you stop pumping and before you
clean, check, or service the equipment.
1.Remove power from the system.
2.Open the dispensing valve, if used.
3.Open the uid drain valve to relive uid pressure.
Have a container ready to catch the drainage.
Pump shutdown
MPa/bar/PSI
At the end of the work shift and before you check,
adjust, clean or repair the system, follow Pressure
relief procedure page 12.
Special precautions
1.When medium is left in the pump chambers, this
can generate chemical reactions when pumping
another uid. Always ush pumps with a neutral
uid before changing from medium.
2.Take care liquids left in the pump chamber can’t
freeze, this can damage the pump.
3.In case of big changes in temperature while
operating, it is necessary to control the tension
on the bolts carefully. Sudden big temperature
shocks can cause over on under tightening of
the pump and will lead to leaks and/or damage
the pump.
MAINTENANCE / REPAIR
NOTE: During maintenance / repair work, the
power supply should be completely disconnected
and secured against inadvertent connection. To
avoid injury from re, explosion, or electric shock,
all electrical wiring must be done by a qualied
electrician and comply with all local codes and
regulations.
Flushing
The pump can be shut down with the medium
inside. However, do not leave the pump in this
condition for many hours without supervision -
there is a risk of a leak from the pump or piping,
and uid may continue owing out of the position
of leakage.
When the pump is shut down while pumping slurry,
particulate matter contained in the slurry will be
deposited and get stuck inside the out chamber.
Therefore, after nishing work the pump must be
purged of the remaining uid. Flush the pump
long enough to be sure it is completely free from
any previously pumped liquid. Otherwise, when
starting the pump again, the diaphragm may get
damaged and the center rod may bend. Also the
solid particles found in the while pumping slurry
can get under the ap valves that will remain open.
This may result in a lack of suction or a decrease in
pump performance.
Flush the pump often enough to prevent uid you
are pumping from drying or freezing in the pump
and damage it. Always ush the pump follow
the Pressure relief procedure on page 12 before
storing it for any length of time. Use a compatible
ushing agent.
Tightening treaded connections
Before each use, check all hoses for wear or
damage and replace when necessary. Check all
threaded connections are tight and leak-free.
Tighten and retorque the pump if necessary. Use
torque values on page 26.

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Cleaning the pump
1.Remove the hose from the suction side of the
pump.
2.Remove the hose from the discharge side, and
attach different hoses to the suction side and the
discharge side for cleaning.
3.Be ready with a vessel with cleaning solution,
the kind appropriate for the type of uid
pumped. Next connect the suction-side and the
discharge-side hoses of the pump.
4.Start the pump and let the cleaning solution
circulate for sufcient cleaning.
5.Flush with clean water.
6.Remove the hose from the suction side of the
pump, run the pump for a while to purge the
pump of remaining uid as much as possible.
Daily check
Before starting pump operation, conduct the
following check procedures every day. In case
there appears any irregularity, do NOT start
running the pump until the cause of the irregularity
has been determined and corrective measures
have been taken.
a) Make sure that there is no leakage of uid from
any connection part or the pump.
b)Make sure that there are no cracks in the pump
body or piping.
c) Check the tightness of every bolt of the pump.
(page 22)
d)Make sure that the connection parts of the
piping and peripheral equipment are not loose.
e) Make sure that any parts of the pump that are
to be replaced at regular intervals have been
changed.
Safety check
1.Make sure that voltage is not supplied to the
electronic driver BEFORE you start cleaning the
pump.
2.Make sure that the pump is not pressurized
BEFORE you start cleaning the pump.
3.Be extremely careful when removing piping - the
uid will gush out.
Preventive maintenance schedule
Establish a preventive maintenance schedule,
based on the pump’s service history. This is
especially important for prevention of spoils or
leakage due to diaphragm failure.
Remember to observe the procedures and service
intervals for the drives, refer to the drive manual.
Service intervals must be observed to avoid
dangerous stations caused by the temperature
rise of pump parts or their failure.
Check the pump drive section components
and carry out the ellipse lubrication procedure
(19) each time the diaphragms in the pump are
serviced.
Procedure for lubricating the ellipse without
replacing it:
Pull out the drive housing cap (39). Clean the
ellipse (19) of old grease, clean the ellipse chamber
and the guide shaft (20) and drive shaft (14) of dust
generated by the sliding sleeves.
Visually inspect the bearing and any damage to the
drive section parts. Check the inner surface of the
ellipse (19) for gouges and deformations. Check
the anti-friction bearing (17) for excessive play
and correct positioning - the outer bearing ring is
perpendicular to the inner surface of the ellipse.
If there are any irregularities, use PARTS & KITS
spare parts page. 19.
Lubricate the inner surface of the ellipse (19) with
Gulf CROWN USG 2.5, apply a thin layer of grease
around the entire inner circumference of the ellipse
(19).
For pump coding VA-EPxx xA: Set the O-ring
accordingly (46), position the drive housing cap
(39), pressing it down and making sure that it
adheres evenly over the entire surface to ensure
dust tightness. Tighten the screws of the drive
entrainment (49) Remember to tighten the screws
to the correct torque (page 26).
Establish a preventive maintenance schedule for
the drive component. During the ellipse lubrication
procedure (page: 13), carry out regular efciency
assessments of the drive components: ellipse (19),
eccentric shaft, cylindrical bearing (17), ball Bering
(16). Check the correct seating of the sliding
sleeves (12) and the drive shaft (14) and guide
shafts (20), the parts must not have excessive play.
Important:
To protect the pump from leakage and
to protect the drive section from ingress
of the pumped substance, the use of
a leakage detector is recommended
(option LX).

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Each time the eccentric shaft is replaced, carry out
a visual inspection of the other parts of the drive
section, check the sliding sleeves (12) and drive
shaft seal (13) for damage and signs of excessive
wear. Ensure that the drive shaft (14) and guide
shafts (20) are in good condition
Disassembly
Important:
Follow the pressure relief procedure at
page 12 before starting to work at the
pump!
Clean the pump before disassembly.
Make sure that voltage is not supplied
to the electronic driver!
The uid side of the complete range of VA-EP
pumps are built together the same way. The center
section has the same built up for VA-EP30 to
VA-EP100. Every VA-EP pump is delivered with a
drive or reducer witch ange.

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Disassembly of the drive and side housing
To have access the internal parts of the pump,
it must be dismantled rst. Unscrew the bolts
(44) on the shaft cover (43), then unscrew screw
of eccentric shaft (31) and remove the spacer
(30). Unscrew the bolts (35) on the drive ange,
remove the washers (36) and take off the drive
(33). Unscrew the bolts on the assembly pins (29)
on one side using the allen key. Remove the side
housing (03), than the assembly pins (27) from the
other side housing.
Disassembly of the center housing and
diaphragms
Diaphragms (25) are bolted to the diaphragm shaft
(26). Unscrew one diaphragm (left turning) of the
diaphragm shaft. Remove the center housing (01)
and unscrew the second diaphragm from drive
shaft (14) then unscrew the diaphragm shaft (26)
from the diaphragm.
Remove the o-rings (28) from the center housing (If
disassembled, they need to be replaced!).
Disassembly of the apper valves
To have access to the discharge apper valve you
need to disassembly of the drive rst. To get the
apper valve (05), unscrew the bolts (07) and push
the valve pin (06). Carefully remove the discharge
apper valve.
To have access to the suction apper valves you
need to disassembly of the side housings rst and
then the diaphragms. To get the apper valves (04)
hold the ap of the valve and lift it up. Then use a
at screwdriver to pry the valve "whiskers" around
the sides of the hole. Remove the valve. Do the
same on the other side. Unscrew the diaphragm
shaft bearing (08) when needed.

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Disassembly of the drive side
Eccentric shaft moves in the ellipse (19) which is
bolted to the guide shafts (20) and drive shaft (14).
Unscrew the bolt (23) and take off the guide shaft
cover (42) and guide shaft cap (22). If you meet a
problem with removing the cap, use the M8 screw
to screw it to max 2 cm into the cap and then
remove the whole unit. Remove the parallel key (32).
Unscrew both guide shafts (20) and drive shaft (14)
from the ellipse (19). To have access to shafts you
can help yourself by turning the eccentric shaft
(15). Pull up housing drive side plate (48). Remove
carefully the drive shaft seal (13) and sliding
sleeves drive shaft (12). Unscrew the screws (10)
from the bearing holder (09) and push out the
eccentric shaft (15) with bearings (16, 17) and
holder (09). You can help yourself by screwing two
M6 pins or long bolts into the bearing holder
(09) and using them to pull out the bearing holder
(09) with eccentric shaft (15).
If the eccentric shaft with bearings and holder have
been dismantled, they must be replaced! Never
use the same set!
Assembly
Before starting to assemble please check all parts
on possible damages. Especially the sealing area
of the diaphragms have to be free from scratches.
Assembly of the drive housing
Push the sliding sleeves drive shaft (12) the
beveled edge into the drive housing.
Place the housing drive side plate (48) at against
the drive housing (2). Put the drive shaft seal (13) in
the groove of the drive housing by forming them as
“0”. Push them into the groove by a at surface.
Place the eccentric shaft with bearings and holder
into the drive housing on right position (look at the
screw holes in holder and housing) and push the
bearing holder to the housing. Screw the bearing
holder screws (10). Apply a small amount of Loctite
Thread locking Glue 2400 or comparable to the
threads and put the drive shaft (14) and both guide
shafts (20) into drive housing until you
can see the thread. Then place the ellipse (19)
on the cylindrical bearing (17). Hold the ellipse
to tighten the drive shaft rst and then the guide
shafts. Lubricate the inner surface of the ellipse
(19) with Gulf CROWN USG 2.5, apply a thin layer
of grease around the entire inner circumference of
the ellipse (19). Install the cap (22) and tighten it
with the screw (23). Place the parallel key (32) in
the groove of the eccentric shaft.

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VERDERAIR E-PURE ATEX_v1 | 30.10.2023 17
Drive housing cap (39) the O-ring accordingly
(46), position the drive housing cap (39), pressing
it down and making sure that it adheres evenly
over the entire surface to ensure dust tightness.
Tighten the screws of the drive entrainment (49).
Remember to tighten the screws to the correct
torque (page 26).
Assembly of the apper valves
Insert the discharge apper valve (05) into the
center housing (01) and push discharge valve pin
(06). Screw the discharge valve pin bolts (07).
Put the suction apper valve (04) into the center
housing groove (see gure below). Hold the ap
and by using screwdriver push the ap valve
“whiskers” into groove. Take care not to damage
the edges of the groove. Do the same on the other
side.
ATTENTION
After assembly the discharge apper valve (05) and
both suction apper valve (04) check that valves t
closely to the surface of the center housing.
Assembly of diaphragms and diaphragms shafts
Screw the diaphragm shaft bearing (08) into the
center housing (01). Screw one diaphragm (25)
completely into the diaphragm shaft (26) and then
into the drive shaft (14).
Apply the o-ring (28) on the drive housing and
push the center housing in the diaphragm shaft
and screw the second diaphragm completely into
the shaft. Tighten the drive bolts accordingly.
Adjust when necessary the position of the
diaphragm by turning the eccentric shaft.
Assembly of the pump
Apply the second o-ring (28) on the side housing
end plate (03). Slide the set of assembly pins (27)
into the side housings. Put the nuts on (29). Fasten
the nuts crosswise up to the torque values as
mentioned on page 26.
The shock absorbers (36) are bolted from the
bottom.
Place the drive O-ring [47] on the connection
ange of the drive. Carefully nd the right place
and put the drive with gearbox (33) on the
eccentric shaft. Tighten the screws drive (35) with
washers (36) to the torque values as mentioned
on page 26. Place the eccentric shaft spacer (30)
on top of the eccentric shaft and tighten with the
screw (31). Finally, place the shaft cover and screw
with bolts. Tighten the drive bolts accordingly to
the torque values as mentioned on page 26.

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Problem Cause Solution
Drive will not operate - No power on the line
- The frequency controller is turned off
or not set
- The wires are unconnected
- Check the connection of the electric
plug and the general power supply
- Switch on or/and set the frequency
controller
- Check all electric wires are correct
connected
Pumps cycles at stall or falls to hold
pressure at stall
- Worn check valves
- Solid parts entered the pump
- Replace worn parts
- Clean or replace valves
Pump will not cycle or cycle once and
stops
- Check if valve is not sticked
- Discharge line is closed
- Suction line closed
- Diaphragm rapture
- Suction line is too long before liquid
can enter the pump
- Liquid viscosity is too high
- Replace valve balls
- Open valve in the discharge line and/
or check on blockage
- Open valve in the suction line and/or
check on blockage
- Replace the diaphragms and clean
the pump
- Reduce the suction line
- Higher the pomp speed
Pumps operates erratically - Clogged suction line
- Check valves sticky or blocked
- Diaphragm rapture
- Check suction line
- Clean or replace valves
- Replace the diaphragms and clean
the pump
Air bubbles in uid - Suction line is loose
- Diaphragm rapture
- Suction container empty
- Cavitation
- The nuts are loose
- Tighten
- Replace the diaphragms and clean
the pump
- Fill or replace suction container
- Check suction condition and adapt
when necessary or lower the pump
speed (to match the viscosity of the
liquid)
- Tighten all nuts
Fluid in drive side - Diaphragm rapture - Replace the diaphragms and clean
the pump
Discharge is decreasing - Suction strainer is blocking
- Discharge strainer is blocking
- Medium becomes more viscous
- Clean suction strainer
- Clean discharge strainer
- Check why
Pump is running but not enough
suction capability
- Pump is running to fast
- Cavitation
- Suction strainer is blocking
- Suction line closed
- Worn check valves
- Leak in suction line and/or suction
connections
- The suction tube is bigger than port
size
- Starting-up pump slow running.
Once pump is lled with liquid you
can run the pump faster
- Check suction condition and adapt
when necessary
- Clean suction strainer
- Open valve in the suction line and/or
check on blockage
- Replace worn parts
- Repair and make leak tight
- Change the tube size
TROUBLESHOOTING

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VERDERAIR E-PURE ATEX_v1 | 30.10.2023 19
PARTS & KITS
Parts
SEE SEPERATE PARTS LIST
Kits
In case of break down, we recommended to have a spare part kit for your pump on stock.
ECCENTRIC SHAFT SET, CONTENT Quantity
SET OF ECCENTRIC SHAFT WITH BEARINGS AND HANDLE VA-EP:
Bearing holder (9)
Bearing holder screws (10)
Eccentric shaft (15)
Ball bearing (16
Cylindrical bearing (17)
Circlip (18)
Other components:
Parallel key (32)
Bearing holder screws (10)
Elipse (19)
Drive shaft seal (13)
1
4
1
1
1
1
1
1
4
1
1
WET PART SET, CONTENT Quantity
Flapper valve suction (4)
Flapper valve discharge (5)
Diaphragm (25) with diaphragm plate (24)
Diaphragm shaft, VA-EP (26)
Diaphragm shaft bearing (8)
Discharge valve pin (6)
2
1
2
1
1
1
Please check the seperate spare parts list for the order nr. for the kit you need for your pump.

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VERDERAIR E-PURE ATEX_v1 | 30.10.2023 20
EXPLODED VIEWS
VA-EPxxxA (…)
30
31
32
48
1 7 4
5
8 325
27
2426
406
28
25
16
10
19
18
17
15
9
1220222338 29 42
2
37
45
7
12 24
4
29
14 13
38
49
39
46
47
POS. PART NAME QUANTITY
1 CENTER HOUSING, VA-EP 1
2 DRIVE HOUSING, VA-EP 1
3 HOUSING END PLATE, VA-EP 1
4 FLAPPER VALVE SUCTION, VA-EP 2
5 FLAPPER VALVE DISCHARGE, VA-EP 1
6 DISCHARGE VALVE PIN 1
7 DISCHARGE VALVE PIN BOLT 2
8 DIAPHRAGM SHAFT BEARING 1
9 BEARING HOLDER 1
10 BEARING HOLDER SCREWS 4
12 SLIDING SLEEVE DRIVE SHAFT 4
13 DRIVE SHAFT SEAL 1
14 DRIVE SHAFT 1
15 ECCENTRIC SHAFT, VA-EP 1
16 BALL BEARING 1
17 CYLINDRICAL BEARING 1
18 CIRCLIP 1
19 ELLIPSE 1
20 GUIDE SHAFT 2
22 GUIDE SHAFT CAP 1
23 GUIDE SHAFT CAP SCREW 1
24 DIAPHRAGM PLATE, VA-EP 18