Millipore WP6111560 User manual

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PR036484w REV 07/20 1 of 7
User Guide
Chemical Duty
Vacuum/Pressure Pump
WP6111560
WP6122050
WP6110060
Introduction
The vacuum/pressure pump is a continuously running
constant air flow type unit for use with laboratory
equipment. This vacuum/pressure pump combines
all the advantages of lower pressure pumps with the
perfect uniformity of diaphragm type operation. It
compresses air by means of a long-life diaphragm,
which flexes within the compressor. This pump is
intended for filtration of liquids or gases, or for
other continuous or intermittent use, with all types
of filter holders.
CAUTION: Always use the supplied hydrophobic vent
filter or a vacuum-flask water trap in conjunction with
the pump (see Figures 1 and 2). Never pump or draw
liquids through the pump, as this will damage it.
The pump has these features:
• The motor and pump are permanently lubricated.
• A thermal overload switch with automatic reset
protects the motor.
• Low operating noise is further minimized
by rubber feet.
• All internal surfaces (except the stainless steel
leaf valves) are coated with PTFE polymer, to
prevent corrosion.
• The diaphragm is PTFE-lined to prevent attack by
chemicals or solvent vapors.
• A Millex®-FA50 hydrophobic vent filter and
27 in. (69 cm) of 1⁄4in. (6 mm) I.D. silicone
vacuum tubing are supplied with the pump.
Rules for Safe Operation
YThe motor is thermally protected and will
automatically restart unexpectedly when
the overload device resets.
Do NOT pump flammable or explosive gases or
vapors or operate this pump in an atmosphere
containing flammable or explosive gases
or vapors.
Use of this pump in a manner not specifically
stated in this user guide may result in severe
bodily injury.
Read and understand the information in this owner’s
manual before operating the vacuum/pressure pump.
• The vacuum/pressure pump should be operated in a
dry, clean, and well ventilated area.
NOTE: To ensure proper cooling, the
vacuum/pressure pump cooling fan must not be
blocked and should be a minimum of 1 in. (2.5 cm)
away from any wall or obstruction.
• When the unit is not in use, wrap the power cord
around the vacuum/pressure pump and store in a
dry place. Do not abuse the cord.
• Replace the Millex®-FA50 vent filter (SLFA05010)
if necessary.
• Inspect hose, plug, and cord for signs of damage
before use. Do not use if a deficiency is found.
Never operate a damaged unit. For replacement
parts, see Technical Assistance section for details.
• This vacuum/pressure pump needs no lubrication.
Applying oil to any part may result in polluted air
delivery to the air-handling equipment and will
damage the pump.
• To operate at maximum efficiency, the pump system
must be thoroughly clean. Refer to the Maintenance
section for details on properly cleaning the pump.
• Compressed air blast must never be aimed
at anyone because it can cause serious injury.
Keep children away.

PR036484w REV 07/20 2 of 7
Pump Components
Letter Description
A Handle
B Vacuum gauge
C Pressure gauge
D Pump head
E Vacuum valve
F Pressure valve
G On/off switch
G
A
BC
D
E
F
• All vacuum/pressure pumps generate heat, even
under normal operating conditions. To avoid serious
burns, never touch the head parts or tubing during
and immediately after operation.
• If higher vacuum or pressure is required, use the
High Output Vacuum/Pressure Pump (WP6211560,
WP6222050, WP6210060).
Usage Guidelines
• Always use the Millex®-FA50 vent filter and
1/4 inch silicone tubing included with the pump when
applying vacuum. This will prevent liquids or vapors
from entering the pump. A properly attached
Millex®-FA50 vent filter is illustrated in Figure 1.
• For maximum protection of the pump, use the
Millex®-FA50 vent filter AND a vacuum trap to protect
the pump from vapors and gases. The vacuum
trap consists of a 1 liter filtering flask (Cat. No.
XX1014705), No. 8 stopper (XX1014708) and
silicone tubing. Additional tubing is available as
Cat. No. XX7100004. This assembly is illustrated
in Figure 2.
• Never pump or draw liquids through the pump. This
will damage the pump. The filter flask and vacuum
trap should be emptied after each use.



  


Millex®-FA50
filter unit
Filter
holder
Filter
flask
Vacuum
pump



    
 

Millex®-FA50
filter unit
Filter
flask
Vacuum
trap
Filter
holder
Vacuum
pump
Figure 1. Proper use of Millex®-FA50 filter Figure 2. Proper use of vacuum trap and
Millex®-FA50 filter

PR036484w REV 07/20 3 of 7
Product Labeling Symbols
YWARNING Direction of Pressure Control
(Valves)
ON (Power) Hot Surface
OFF (Power) Protective Conductor Terminal
How to Use the Chemical Duty
Vacuum/Pressure Pump
The Vacuum/Pressure Pump is shipped ready for
use. See the Specifications section for required
operating conditions.
CAUTION: The pump is rated for indoor use only.
CAUTION: Be sure available power matches
unit requirements. A grounded three-conductor
AC electrical source is required. Units are available for
115 V~ 60 Hz, 100 V~ 50/60 Hz, or 230 V~ 50 Hz.
See the Specifications section for details of electrical
supply options available.
1. Unpack the unit and retain all packing material until
you verify proper product operation.
2. The unit rests on four vibration isolator pads. Place
the unit on a suitable surface, such as a bench,
desk, or table. Be sure not to block the ventilation
holes located on the motor housing.
3. Select appropriately-sized tubing, according to your
application. Use approximately 1⁄4in. I.D. tubing to
withstand the anticipated pressure or vacuum.
CAUTION: During vacuum filtration, use the
supplied Millex®-FA50 hydrophobic vent filter,
to prevent excessive amounts of liquids or mist
from entering the pump (Figure 1). For maximum
protection, use a vacuum-flask water trap
(Figure 2).
4. Prepare the necessary equipment or filter holder and
connect the tubing to the equipment. Do not connect
the tubing to the pump.
5. Plug the power cord into an appropriate
electrical source.
CAUTION: Do not turn the pump on with
equipment or filter holder already attached.
If the pump is inadvertently turned on with the
tubing fully connected and it does not run, turn
off the pump and disconnect the tubing. Restart
the pump and then reconnect the tubing. If the
pump’s thermal overload switch automatically
shuts off the motor, disconnect the tubing and
allow the pump to cool for at least 10 minutes
before restarting. Reconnect the tubing only after
the pump is operating.
6. Turn on the pump, using the toggle switch located
on the front of the pump.
7. Connect the tubing from the filter holder or other
equipment to the pump and begin your procedure.
8. If using the pump for vacuum: Adjust the
vacuum by closing the pressure regulator
and opening the vacuum regulator fully
(counterclockwise). Slowly tighten down (clockwise)
the vacuum regulator until you obtain the desired
vacuum reading on the vacuum gauge.
If using the pump for pressure: Adjust the
pressure by turning the vacuum regulator down
fully and opening the pressure fully (turn counter
clockwise). Slowly tighten down (turn clockwise)
the pressure regulator until you obtain the desired
pressure reading on the pressure gauge.
9. Turn off the pump when you are finished.Disconnect
the tubing first from the pump and then from the
filter holder or other equipment.
Maintenance
Under normal operating conditions, and using
proper handling procedures, the chemical duty
vacuum/pressure pump should provide many hours
of trouble-free operation.
Dry vacuum/pressure pumps are 100% oil-free.The
pump employs a non-lube piston and cylinder. No
maintenance is necessary for the bearings.
All bearings are sealed and permanently lubricated.
Lubrication should not be attempted. The units are
built for continuous duty operation with quietness
and durability.
CAUTION: Do not lubricate any of the parts with oil,
grease or petroleum products. Do not clean with acids,
caustics, or chlorinated solvents. Do not replace the
connecting rod or motor bearings.
Disconnect the pump from power before
performing any maintenance.

PR036484w REV 07/20 4 of 7
Replacing the O-ring
1. Unscrew the four socket-cap screws from the pump head and unscrew the two
screws from the pump handle. Remove the pump head assembly from the top of
the pump.
2. Remove the five Phillips-head screws that hold the valve plate assembly to the
underside of the pump head assembly.
3. Remove the O-ring and replace it by pressing the new O-ring into the groove.
4. Replace the valve plate assembly with the recessed screw holes facing out and
tighten the five Phillips-head screws.
5. Replace the pump head assembly and tighten the socket head screws.
Underside
of pump
head
assembly
Valve plate
O-ring
Groove
Diaphragm liner
Diaphragm
Retainer plate
Large hole
Pump
head
assembly
Replacing the Diaphragm
1. Unscrew the four socket-cap screws from the pump
head and unscrew the two screws from the pump
handle. Remove the pump head assembly from the
top of the pump.
2. Unscrew the four Phillips-head screws, then
remove the retainer plate, the diaphragm liner, and
the diaphragm.
3. Replace the diaphragm (the number printed
on it should be facing up), aligning the holes
in the diaphragm with the screw holes in the top
of the pump.
4. Replace the diaphragm liner, lining up holes in the
liner with the screw holes in the top of the pump.
5. Replace the retainer plate, aligning the four small
holes with the screw holes and orienting the large
hole to the left as shown. Replace and tighten the
Phillips-head screws.
CAUTION: Take care not to nick the heads of the
screws; burrs can damage the inlet valve.
6. Replace the pump head assembly and tighten the
six screws to hold it in place.

PR036484w REV 07/20 5 of 7
Troubleshooting
Vacuum Problems
Leakage, contamination, and unusual out-gassing are
the general causes of problems associated with poor
vacuum. To operate at maximum efficiency, a system
must be thoroughly clean. If the system is completely
clean and free from leaks, and unwarranted vacuum
problems still exist, the pump should be checked. A
simple criterion for the condition of the pump is the
determination of its maximum vacuum capability.
This can be accomplished by blocking the intake and
reading the vacuum level on the gauge.
Pressure Problems
Leakage and contamination are the general causes of
problems associated with poor pressure. To operate
at maximum efficiency, a system must be thoroughly
clean. If the system is completely clean and free from
leaks, and unwarranted pressure problems still exist,
the pump/compressor should be checked by
a service technician.
Low
Flow
Low
Pressure
Unit Will
Not Start
Motor
Overheats
Loud
Unit Possible Cause Corrective Action
● ● ●
Damaged valves Replace flapper valves
● ● ●
Debris in valves Remove debris and check for valve damage
● ● ●
Worn diaphragm Replace diaphragm and/or liner
● ● ●
Loose head screws Tighten head screws
● ● ●
Bent motor shaft Replace entire unit
●
Loose fittings Tighten fittings
●
Insufficient ventilation in enclosure Increase air circulation in enclosure
● ●
Loose rod clamping screw Apply Loctite®242 and re-tighten
● ● ●
Damaged O-rings Replace O-rings

PR036484w REV 07/20 6 of 7
1
2
3
4
5
6
7
8
9
10
11
12
13 14
15
Repair
Two replacement part kits are available for the chemical duty vacuum/pressure pump.
The accompanying drawing outlines the contents of each of the kits. We recommend trained service
technicians perform repairs. For further information and help ordering the correct kit, please contact
Technical Service.
Disconnect the pump from power before performing any maintenance.
Key Description
Maintenance
Kit
Rebuild
Kit
1Connecting rod
assembly — —
2Diaphragm, Buna-N 1 —
3Diaphragm liner, PTFE 1 —
4Diaphragm hold-down
plate assembly — 1
5
Valve plate assembly
(includes flapper
[leaf] valves)
— 1
6O-ring gasket, head 1 —
7Pump head — 1
8Vacuum regulator
assembly — —
9Vacuum gauge — 1
10 Pressure regulator
assembly — —
11 Pressure gauge — 1
12 Head screws 4 4
13 Handle screws 2 2
14 Handle — —
15 Rubber suction feet — —

PR036484w REV 07/20 7 of 7
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as MilliporeSigma in the U.S. and Canada.
Merck, Millipore, Millex, and Sigma-Aldrich are trademarks of Merck KGaA, Darmstadt,
Germany or its affiliates. All other trademarks are the property of their respective owners.
Detailed information on trademarks is available via publicly accessible resources.
© 2021 Merck KGaA, Darmstadt, Germany and/or its affiliates. All Rights Reserved.
Specifications
Performance
Vacuum 24.0 inches of Hg (inHg)
Maximum Free Air
Displacement 37 L/min
Pressure 20 psi continuous,
35 psi intermittent
(230 V~ pump duty cycle:
15 minutes on, 15 minutes off)
Sound Level Less than 60 dB(A)
Dimensions
WP6111560,
WP6110060 WP6122050
Length 7.5 in. (19.1 cm) 10.5 in. (26.7 cm)
Width 7 in. (17.8 cm) 9.4 in. (23.9 cm)
Height 8 in. (20.3 cm) 9.7 in. (24.6 cm)
Weight (approximate) 9 lbs (4.1 kg) 12 lbs (5.4 kg)
Tubing connectors Stepped 1⁄4in. hose barb
Materials of Construction
Body and pump head Die cast aluminum
Diaphragm Buna-N with PTFE lining
Head gasket Buna-N
Leaf valves High grade stainless steel
Internal pump
surfaces PTFE-coated
Electrical Specifications
115 V~, 60 Hz, 3.5 A
or
100 V~, 50/60 Hz, 4.0 A
Shaded-pole, single phase,
1⁄15 HP motor 3-pronged,
grounded cord and plug
230 V~, 50 Hz,
1.7/1.1 A
HAR cordage, CEE 7/7
(Schuko) plug
Line voltage limits ±10% of supply voltage
Environmental Conditions
Temperature 5 °C (41 °F) to 40 °C (104 °F)
Relative Humidity,
Max.
80% for temperatures up to 31 °C,
decreasing to 50% at 40 °C
Altitude, Max. 2,000 meters
Pollution Degree 2, per IEC 664
(indoor usage: lab, office, etc.)
Installation Category
II, per IEC 624
(local level: appliances,
portable equipment, etc.)
Product Ordering Information
Purchase products online at SigmaAldrich.com.
Catalogue Number
Chemical Duty
Vacuum/Pressure Pump
115 V~, 60 Hz WP6111560
230 V~, 50 Hz WP6122050
100 V~, 50/60 Hz WP6110060
Replacement Parts
Pump Maintenance Kit WP61MNT00
Includes diaphragm, diaphragm
liner, O-ring gasket, head
screws, and handle screws
Pump Rebuild Kit WP61RBD00
Includes hold-down plate
assembly, valve plate assembly,
pump head, vacuum gauge,
pressure gauge, head screws,
and handle screws
Millex®-FA50 filter unit, 10/pk SLFA05010
Pressure tubing, silicone, 25 ft XX8000025
Vacuum tubing, silicone, 4 ft XX7100004
Notice
We provide information and advice to our customers
on application technologies and regulatory matters
to the best of our knowledge and ability, but without
obligation or liability. Existing laws and regulations are
to be observed in all cases by our customers. This also
applies in respect to any rights of third parties. Our
information and advice do not relieve our customers of
their own responsibility for checking the suitability of
our products for the envisaged purpose.
The information in this document is subject to change
without notice and should not be construed as a
commitment by the manufacturing or selling entity, or
an affiliate. We assume no responsibility for any errors
that may appear in this document.
Contact Information
For the location of the office nearest you, go to
SigmaAldrich.com/offices.
Technical Assistance
Visit the tech service page on our web site at
SigmaAldrich.com/techservice.
Standard Warranty
The applicable warranty for the products listed in this
publication may be found at SigmaAldrich.com/terms.