Ulvac DA-121D Series User manual

No．26700-2-06-8
Original instructions
INSTRUCTION MANUAL
Diaphragm-type Dry Vacuum Pump
Model
ＤＡ－１２１ＤＣ、１２１ＤＤ、１２１ＤＥ、１２１ＤＦ
ＤＡ－２４１ＳＣ、２４１ＳＤ、２４１ＳＥ、２４１ＳＦ
(According to CE, UKCA, TUV, cTUVus)
Request to Users
Please read this manual thoroughly to ensure safe and
effective use of the equipment.
Keep this manual in a safe place.
Due to periodic improvements in performance, the
equipment described in this manual is subject to
changes in dimensions and specifications without prior
notice.
ULVAC KIKO,Inc.
DA-121D series
DA-241S series

We,
Company:ULVAC KIKO,Inc.
of
Address:291-7 Chausubaru Saito-city,Miyazaki (ZIP Cord:881-0037) Japan.
This declaration is issued under the sole responsibility of the manufacturer.
In accordance with the following Directive:
2006/42/EC
Machinery Directive
2011/65/EU+(EU)2015/863
RoHS Directive
declare under our sole responsibility that the product,
Type of Product
:
Diaphragm Type Dry Vacuum Pump
Model Name
:
DA-121DC，DA-121DD，DA-121DE，DA-121DF
DA-241SC，DA-241SD，DA-241SE，DA-241SF
to which this declaration related is in conformity with the following standards:
EN 1012-2:1996+A1:2009
Compressors and vacuum pumps – Safety requirements, Part2. Vacuum pumps
IEC EN 61010-1:2010+A1:2019
Safety requirement for electrical equipment for measurement, control and laboratory use
Part1.General requirement
following the provisions of
The person stated below will keep the following technical documentation:
operating and maintenance instructions
technical drawings
description of measures designed to ensure conformity
other technical documentation, e.g. quality assurance measures for design and production
Person authorized to compile the technical file:
( Name and address) Chris Goebel
ULVAC GmbH
Klausnerring 4 85551 Kirchheim b. München, Germany
31.Mar, 2023
Makoto Uchimura
Miyazaki , Japan
Development manager
(date & place)
(name, function, signature)
Declaration of Conformity

We,
Company:ULVAC KIKO,Inc.
of
Address:291-7 Chausubaru Saito-city,Miyazaki (ZIP Cord:881-0037) Japan.
This declaration is issued under the sole responsibility of the manufacturer.
In accordance with the following Directive:
Supply of Machinery (Safety) Regulations 2008
(S.I. 2008 No. 1597, as amended by S.I. 2019 No. 696)
The Restriction of the Use of Certain Hazardous Substances in Electrical and
Electronic Equipment Regulations 2012 (S.I. 2012 No. 3032)
declare under our sole responsibility that the product,
Type of Product
:
Diaphragm Type Dry Vacuum Pump
Model Name
:
DA-121DC，DA-121DD，DA-121DE，DA-121DF
DA-241SC，DA-241SD，DA-241SE，DA-241SF
to which this declaration related is in conformity with the following standards:
BS EN 1012-2:1996+A1:2009
Compressors and vacuum pumps – Safety requirements, Part2. Vacuum pumps
BS IEC EN 61010-1:2010+A1:2019
Safety requirement for electrical equipment for measurement, control and laboratory use
Part1.General requirement
following the provisions of
The person stated below will keep the following technical documentation:
operating and maintenance instructions
technical drawings
description of measures designed to ensure conformity
other technical documentation, e.g. quality assurance measures for design and production
Person authorized to compile the technical file:
( Name and address) Chris Goebel
ULVAC GmbH
Klausnerring 4 85551 Kirchheim b. München, Germany
31.Mar, 2023
Makoto Uchimura
Miyazaki , Japan
Development manager
(date & place)
(name, function, signature)
Declaration of Conformity

Contents
Pages with a shaded background are those which contain items related to safety.
Before Using the Equipment...........................................................................................................０１
Checks When Opening Packaging..................................................................................................０２
Using the Pump Safety...................................................................................................................０３
・Safety symbols.........................................................................................................................０３
・Cautions for Safety in Use..................................................... ..................................................０４
1.Product Outline................................................................................................................................１
1.1 Purpose of Use and Prohibitions......................................................................................１
1.2 Specifications ..................................................................................................................１
1.3 Thermal Protector............................................................................................................１
2.Dimensions......................................................................................................................................２
3.Installation and Storage ...................................................................................................................４
3.1 Cautions for Installation and Storage...............................................................................４
3.2 Environmental Conditions for Installation, Storage, and Operation ..................................４
3.3 Location...........................................................................................................................４
3.4 Electric wiring………………………………………………………………………… …. ……. ４
3.5 Fluctuations in the power voltage and frequency …………………………..……. . ………..４
3.6 Checking Operation After Installation...............................................................................５
3.7 Piping ..............................................................................................................................６
3.8 Storage............................................................................................................................６
4.Cautions for Operation.....................................................................................................................７
4.1 Cautions for Operation.....................................................................................................７
4.2 Operation of the Thermal Protector..................................................................................７
4.3 Starting in Cold Weather..................................................................................................７
5.Pump Performance..........................................................................................................................８
5.1 Pressure Achieved...........................................................................................................８
5.2 Evacuation Rate..............................................................................................................８
5.3 Power Requirements.......................................................................................................８
6.Maintenance, Inspection, and Repair...............................................................................................９
6.1. Cautions for Maintenance, Inspection, and Repair...........................................................９
6.2 Maintenance....................................................................................................................９
6.3 Regular Inspections.........................................................................................................９
6.4 Replacing and Cleaning Consumables........................................................................１１
1) Cleaning DA-121D and DA-241S series Filters........................................................１１
2) Replacing DA-121D and DA-241S series Diaphragms.............................................１２
3) Replacing DA-121D series Valves............................................................................１３
4) Replacing DA-241S series Valves............................................................................１４
5) Replacing the DA-121D series outlet filter ................................................................１５
6) Replacing the DA-241S series outlet filter.................................................................１５
7) Replacing DA-121D and DA-241S series O Rings...................................................１６
6.5 Troubleshooting List ....................................................................................................１７
7.In Conclusion...............................................................................................................................１８
・Warranty………………………………………………………………………………….……………１８
・Usage Status Check Sheet
・Product information, service bases, and contact information

Figures and Tables
Fig.2.1 DA-121D series Dimensions ...................................................................................................２
Fig.2.2 DA-241S series Dimensions....................................................................................................３
Fig.3.1 Change region of the voltage and frequency...........................................................................５
Fig.3.2 Example of Piping Used When Evacuating a Vessel...............................................................６
Table 1.1 Product Specifications (50/60 Hz) ......................................................................................１
Table 6.1 Consumables List............................................................................................................１０
Table 6.2 Locations for Maintenance and Inspection ......................................................................１０
Table 6.3 Troubleshooting List........................................................................................................１７

０１
Before Using the Equipment
Thank you for purchasing this product. Your custom is very much appreciated.
This pump is designed solely for vacuum discharge, and may malfunction or cause accidents if not
handled appropriately. Read the manual thoroughly, and pay due attention to inspections,
maintenance, and safety.
Personnel Handling the Equipment
Only persons who have read this manual thoroughly, and have sufficient understanding of
safety, pump specifications, and method of operation, may operate this pump.
Read the Manual Thoroughly
Read the manual thoroughly in order to use the equipment correctly. Read the section on
Safe Use particularly closely.
Keep This Manual in a Safe Place
After reading this manual, be sure to keep it in a safe place which is readily accessible to
others needing to use it.
Copying This Manual Is Prohibited
No part of this manual may be copied for use by a third party without the express
permission of the manufacturer.
Statutory Requirements for Disposal
Follow all statutory and local authority regulations when disposing of this pump.
Safety During Repair
Please provide a full description of the circumstances of use (particularly the use of
dangerous materials) for the safety of repair personnel when requesting the manufacturer
for repairs to the pump. Your request for repair of may be refused if these circumstances
are unclear.

０２
Checks When Opening Packaging
Check the following after opening the packaging.
(1) Is the product as you requested?
(2) Are the accessories and necessary parts included?
Standard accessories
・User’s manual -------------------- ×1
・Inlet and outlet caps (fitted to inlet and outlet) -------------------- ×2
(3) Is the pump damaged in any way?
(4) Are any external screws or inlet and outlet pipes loose? Are any components missing?
Contact your agent or the sales division of the manufacturer if there are any problems with the
pump.
Do not hold or push the tube at the top of the pump while removing it from the
packaging.
Damage to the tube may affect performance of the pump.
!
Caution
n
DA-121D
series
DA-241S
series
DA-121D series
DA-241S series

０３
Using the Pump Safety
To ensure that the pump is handled correctly, read this section thoroughly before use.
This manual and the warning labels on the pump include safety icons as an aid to understanding
safety requirements.
These safety icons warn the operator and others of possible dangers and damage and should
always be followed.
・Safety symbols
The meanings of the safety symbols are as follows.
Incorrect handling of the equipment is very likely to result in death or serious injury to the
operator.
Incorrect handling of the equipment may result in death or serious injury to the operator.
Incorrect handling of the equipment may result in light or medium injuries to the operator or
damage to the equipment.
Incorrect handling of the equipment may result in damage to the equipment and hinder its
correct operation.
The surface of some parts of the part reach temperature of more than 60℃during operation.
Do not touch. It may lead to burns.
Turn off the main power supply before performing electrical work or wiring.
It may lead to electric shocks.
High Temperature
Electric Shock
!
Danger
!
Warning
!
Caution
!
Note

０４
・Cautions for Safety in Use
Applications
(1) This pump is not designed to be explosion-proof, and should therefore not be used to
discharge explosive gases.
(2) Not be used with toxic gases. In addition to discharge of gas via the outlet, gas may also leak
from other parts of the pump, and it should therefore not be used with toxic gases. If toxic
gas is discharged for any reason it is important to note that the interior of the pump will be
contaminated by the gas, requiring appropriate caution during maintenance.
Maintenance and Repair
(3) When requesting the manufacturer’s service division to dismantle and repair the pump,
always note the gas which the pump has been used with on the Usage Status Check Sheet.
Note that if it has been used to discharge toxic gas for any reason it will be contaminated.
Please be aware that use with some gases will preclude dismantling and repair.
Installation
(1) Do not use the pump in an explosive atmosphere. Such use may result in injury and fire.
(2) Ensure that there are no inflammable materials such as solvents in the vicinity when using
the pump.
(3) Ensure that the pump is freely ventilated to prevent overheating which may result in fire or
burns.
Power Supply
(4) Always remove the power cord before checking or repairing the pump. Failure to do so may
result in electric shock, or the pump suddenly starting and causing injury.
(5) Ensure that the relevant wiring is in accordance with technical standards for electrical
equipment and wiring regulations. Incorrect wiring may result in fire.
(6) Remove the power cord socket before connecting any wiring. Connecting wiring with the
power on may result in electric shock.
(7) Always ensure that the pump is correctly earthed. A dedicated earth leakage breaker is
recommended. Failure to earth the pump correctly may result in electric shock if a fault or
earth leakage occurs.
(8) Use the pump only at the rated voltage. Use at other than the rated voltage may interfere
with operation of the overload protection device, and this may result in the motor burning out,
or fire.
(9) Do not damage, modify, pull the power cord, or place objects on it. Damage to the cord may
result in electric shock or fire.
(10)Touching the power cord with wet hands may result in electric shock.
(11)Touching electrical wiring etc while inserting the power plug may result in electric shock.
!
Danger
!
Warning

０５
Operation
(12)This pump is not designed to be explosion-proof. When using the pump, ensure that there
are no inflammable materials such as solvents, or explosive gases, in the vicinity. Use under
such conditions may result in injury or fire.
(13)Inserting fingers or objects into the pump inlet may result in electric shock, injury, or fire.
(14)Operating the pump with the discharge outlet blocked, or with a device which prevents
passage of gas to the discharge outlet, may result in rupture of the pump. The internal
pressure of the pump rises and the pump body may rupture and the motor become
overloaded.
This pump is not designed to be pressure-resistant. The internal pressure of the pump is
limited to 0.03 MPa (gauge pressure).
Maintenance and Repair
(15)The pump should be dismantled or repaired only by a repair technician trained by the
manufacturer.
(16)To prevent ingestion of microscopic particles resulting from wear of components, use a dust
mask and gloves when replacing diaphragms, valves, and O rings.
Installation
(1) To prevent back injuries, always use at least two people when lifting and moving the pump.
(2) Microscopic particles resulting from wear of components are discharged from the outlet and
contaminate the room. If necessary, connect a pipe from the discharge outlet to the outside
of the building.
(3) The fine clearances used in this pump require that the following conditions be satisfied during
storage, installation, and operation.
1. Ambient temperature of 0~40°C and maximum relative humidity of 85% during
operation.
2. Other conditions for storage and operation.
a) Level floor of sufficient strength.
b) No condensation
c) Dust-free environment
d) Well ventilated
e) Environment free of corrosive or explosive gas.
f) Not subject to direct sunlight.
g) No danger of fire.
h) Maximum ambient temperature of 40°C during assembly of pump.
i) There is sufficient space around the pump and the pump cooling fan is not
blocked.
!
Warning
!
Caution

０６
(4) Do not hold or push the tube at the top of the pump (see below). Damage to the tube may
affect performance of the pump.
Operation
(5) Touching rotating components (e.g. motor, main shaft, axial joints, cooling fan) while the
pump is in operation may result in injury.
(6) The overload protector operates when the pump becomes excessively hot. Touching it in this
condition may result in burns.
(7) Touching the motor while the pump is in operation or while it is still hot immediately after
having been switched off may result in burns.
(8) Do not insert fingers or objects into, or peer into, the inlet or outlet during operation.
Maintenance and Repair
(9) If the pump ceases operation, turn power OFF (set switch to O) immediately to prevent
accidents, remove the power cord from the wall outlet, and contact your dealer or the
manufacturer for inspection and repair.
(10)Leave the pump for at least 30 minutes until it has cooled, and begin operation again.
Touching the pump immediately after it has stopped may result in burns.
!
Caution
DA-241S series
DA-121D series

０７
Installation
(1) The pump may malfunction if it is subjected to shocks or tipped over on its side.
Applications
(2) This pump is not designed to be corrosion-proof. Use it only with clean air at normal
temperature, or with gases of equivalent characteristics.
(3) This pump is designed solely for vacuum extraction. Operation for long periods at
near-atmospheric pressures may result in a malfunction.
(4) In addition to discharge of gas via the outlet, gas may also leak from other parts of the pump,
and it should therefore not be used with toxic gases. If toxic gas is discharged for any reason
it is important to note that the interior of the pump will be contaminated by the gas, requiring
appropriate caution during maintenance.
(5) Entry of corrosive gases, organic solvents, fluids, or gases able to be condensed (eg. steam)
may result in damage to the pump and prevent normal operation.
(6) Entry of gases containing dust and particles may prevent normal operation of the pump.
Operation
(7) Use the pump within an ambient temperature range of 40°C. Use at high ambient
temperatures will dramatically reduce the life of the pump.
(8) Back pressure at the outlet while the pump is starting may overload the motor.
(9) The thermal protector operates when the pump reaches a very high temperature. Touching
the pump in this condition may result in burns.
Maintenance and Repair
(10)The fine clearances used in this pump require skill in its assembly. If a repair technician is
unavailable, replacement of all consumables should be left to the manufacturer’s service
division.
!
Note

１
1.Product Outline
1.1 Purpose of Use and Prohibitions
This product is a dry vacuum pump which employs reciprocating motion of a rubber diaphragm
for vacuum discharge.
Observe the following prohibitions to ensure normal operation of the pump.
Prohibitions
(1) This pump employs only vacuum operation, and must not be pressurized.
(2) Do not re-sell, repair, or modify this pump without the approval of the manufacturer.
(3) This pump is not designed to be corrosion-proof. Use it only with clean air at normal
temperature, or gases of equivalent characteristics.
(4) Do not attempt to discharge gases containing particles, dust, water, or corrosive
gases.
(5) Do not operate the pump for long periods at near-atmospheric pressure.
1.2 Specifications Table 1.1 Product Specifications (50/60 Hz)
1.3 Thermal Protector
1) This pump is fitted with an automatic reset thermal protector for overload protection. This
device shuts off the motor power supply circuit automatically to prevent burn-out if the motor
temperature rises due to a pump fault which prevents rotation, or if load becomes excessive.
Operating temperature : 120±5°C
2) It is recommended that additional protective devices (e.g. earth leakage breaker, motor
breaker) be fitted.
Model
DA-121DC
DA-121DD
DA-121DE
DA-121DF
DA-241SC
DA-241SD
DA-241SE
DA-241SF
Motor
AC100V
(±10%)
AC115V
(±10%)
AC200V
(±10%)
AC220-230V
(±10%)
AC100V
(±10%)
AC115V
(±10%)
AC200V
(±10%)
AC220-230V
(±10%)
Single phase,400W,4P,with condenser-run,
thermal protector (automatic reset)
Rated current (A)
4.8/5.8
4.2/5.0
2.5/3.0
2.3/2.6
-2.3/2.5
5.2/6.0
4.6/5.2
2.6/3.1
2.5/2.7
-2.4/2.6
Speed (rpm)
1450/1700
1450/1720
1450/1700
1450/1720
-1450/1720
1450/1700
1450/1720
1450/1700
1450/1700
-1450/1700
Discharge rate
(L/minute)
120/145
240/260
Ult.P.(kPa)
3.3
16.0
Noise level
(dB(A))
70 or less（Ultimate pressure at 1m.）
Inlet and outlet
piping
O.D.φ16×I.D.φ12(G1/2)
Weight (kg)
26.0
Air temperature
(°C)
0～40
Dimensions (mm)
193.5(W)×411(L)×285(H)
207(W)×411(L)×285(H)
Excess Voltage
Category
Ⅱ
Pollution Degree
2
Installation
Category
Class 1
Installation
features
Indoor use only
!
Warning
!
Note

２
See Warning (8), P04
See Caution (6), P06
2.Dimensions
!
Warning
!
Caution
Fig.2.1 DA-121D series Dimensions

３
Fig.2.2 DA-241S series Dimensions

４
3.Installation and Storage
3.1 Cautions for Installation and Storage
See Warning (1)(2)(3)(5)(6)(7)(8)(9)(10)(11), P04
See Caution (1)(2)(3), P05 (4),P06
See Note (1), P07
3.2 Environmental Conditions for Installation, Storage, and Operation
The fine clearances used in this pump require that the following conditions be satisfied during
storage, installation, and operation.
1. Ambient temperature of 0~40°C and maximum relative humidity of 85% during operation.
2. Other conditions (during storage and operation).
a) Level floor of sufficient strength.
b) No condensation
c) Dust-free environment
d) Well ventilated
e) Environment free of corrosive or explosive gas.
f) Not subject to direct sunlight.
g) No danger of fire.
h) Maximum ambient temperature of 40°C during assembly of pump.
i) There is sufficient space around the pump and the pump cooling fan is not blocked.
3.3 Location
The pump should be installed level in a location with minimal dust and humidity. This location
should be selected in consideration of ease of installation and removal, inspection, and
cleaning.
Particular attention should be paid to ambient temperature when fitting the pump to equipment.
Use anti-vibration rubbers to isolate the pump from vibrations in the equipment. See 3.2
Environmental Conditions for Installation, Storage, and Operation for details.
3.4 Electric wiring
1) We recommend end-user to equip protection device such as earth leakage breaker motor
breaker on electric wiring to prevent from motor burnout which may occur by over current.
2) This pump is equipped with power cord with ground wire. Wiring and grounding construction
should be done subject to the laws of each area this pump is used.
3.5 Fluctuations in the power voltage and frequency
Standard: General rules for rotating electrical machines
IEC 60034-1:2010
To the voltage change and frequency change in Domain A, in main rated values, it operates
continuously, and can be used practically convenient, and to the voltage change and
frequency change in Domain B, it shall operate with main rated values and shall be used
practically convenient.
However, operation with "it is convenient and safe is maintained on "practical use, it means
not resulting in the grade which shortens a life remarkably, and the characteristic, a
temperature rise, etc. do not apply correspondingly in the state of rating. Moreover, main
rating shows rated torque (N･m).
!
Warning
!
Caution
!
Note

５
Fig. 3.1 Change region of the voltage and frequency
3.6 Checking Operation After Installation
1) Remove the rubber caps from the inlet and outlet.
2) Check that the pump switch is OFF (set to O), and connect the power supply.
Note:Ensure that the power cord is sufficient for the rated voltage and current.
Note:Extension cords should be 3-wire, with lead wires having a cross-sectional area of at
least 1.0 mm2.
3) Turn the switch ON (set to l) and check that gas is being drawn into the inlet.
4) When this check is complete, turn the power switch OFF (set to O) to stop the pump.

６
3.7 Piping
1) Install piping carefully to prevent leaks.
2) Piping connected to the inlet should be at least 12 mm inside diameter.
3) Ensure that piping connected to the outlet does not cause back pressure. Maximum back
pressure is 0.03 MPa (gauge pressure).
4) In case of selecting the inlet pipe and exhaust pipe that are not from our products, please
select the exhaust pipe that has same or larger inner diameter length with the inlet pipe.
5) When evacuating a vessel, ensure that a shut-off valve is placed between the pump inlet
pipe and the vessel (see Fig.3.2).
Fig.3.2 Example of Piping Used When Evacuating a Vessel
3.8 Storage
Turn the switch OFF (set to O), remove the power cord, place the rubber caps over the inlet
and outlet, and store the pump in an area of low humidity.
Vacuum pump
Filter
Leak valve
Shut-off valve
Vessel

７
4.Cautions for Operation
4.1 Cautions for Operation
See Danger (1)(2), P04
See Warning (8), P04 (12)(13)(14), P05
See Caution (5)(7)(8), P06
See Note (2)(3)(4)(5)(6)(7)(8)(9), P07
4.2 Operation of the Thermal Protector
1) When the thermal protector operates, switch the pump power supply OFF (set to O),
remove the power cord from the outlet, and contact the manufacturer. Note that the motor
will be very hot and should not be touched.
2) Once the cause of the fault has been removed, wait until the motor cools and restart
operation.
See Caution (6), P06
4.3 Starting in Cold Weather
Cold weather will increase the viscosity of bearing grease and harden diaphragms, resulting in
the pump being difficult to start. Follow the procedure below in such conditions.
1) Turn the switch ON/OFF 2~3 times with the inlet open to atmosphere until the pump starts.
If the pump still does not start, raise the ambient temperature to beyond 0°C.
2) With the inlet open to atmosphere, run the pump for a few minutes to warm it.
3) Commence normal operation once the pump has warmed.
!
Warning
!
Caution
!
Note
!
Danger
!
Caution

８
5.Pump Performance
5.1 Pressure Achieved
The term “pressure achieved” as employed in the catalogue and in this manual is defined as
“the minimum pressure obtained by the pump without introduction of gas from the pump inlet .
Note that the indicator values for pressure may differ between types of vacuum gauges.
Pressure achieved in practice, occasionally becomes higher than that noted in the catalogue
for the following reasons.
(1)The fact that the vacuum gauge is mounted a distance from the pump, the steam generated
by water droplets and rust etc on the inside walls of the pump and piping, and a variety of
gases present in the system result in increased pressure.
(2)Leaks into the vacuum system introduce other gases, resulting in increased pressure.
5.2 Evacuation Rate
The rate of evacuation for the pump varies with the type of gas entering the inlet, and its
pressure. The maximum rate of evacuation is reached when air is introduced, and decreases
slightly as pressure is reduced.
The resistance of the piping system increases with small bore piping which extends over long
distances, and this reduces the rate of evacuation.
The declared rate of evacuation for this pump is the maximum value achieved with dry air.
5.3 Power Requirements
The power required to drive the pump is the total of the work required to overcome the
rotational resistance of the pump (mechanical work), and the work required to compress the air
(compression work), and is at a maximum at an inlet pressure of 2.7×104 ~4×104Pa. At
pressures below this range the compression work is considerably reduced and power is
expended in mechanical work.