Ulvac G-20DA User manual

- 01 -
P8114-2-01-9
INSTRUCTION MANUAL
OIL ROTARY VACUUM PUMP
MODEL ： G-20DA
MODEL ： G-25SA
MODEL ： G-50DA
MODEL ： G-50SA
Before Use
For safe and efficient use of this pump, please read this manual
carefully before operation.
After reading the manual, keep it in your file for future reference.
Specifications in this manual are subject to change without notice
due to future improvement.
ULVAC KIKO,Inc.

- 01 -
０．Preface
0.1 Before Using This Pump
We, ULVAC KIKO,Inc. thank you for purchasing our vacuum pump. When receiving our vacuum pump,
please confirm the product is the same Model No. as you ordered. Also, check to make sure there
are no damages.
To ensure a long life for this pump, read this manual carefully prior to
installation, operation, and maintenance. Also, pay attention to ascertain the
details of safety, specification, and operational precautions of this pump.
Copyright by ULVAC KIKO,Inc. All right reserved. All material in this manual shall
not be copied without permission by ULVAC KIKO,Inc. Printed in JAPAN.

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0.2 Safety precautions (General Expression)
Safety precautions are identified in this manual using headers DANGER, WARNING, CAUTION, and
NOTE.
"Danger" Indicates major hazardous situations, which present an immediate threat
of death or serious injury.
"Warning" Indicates hazardous situations, which may present a potential to death
or serious injury.
"Caution" Indicates hazardous situations where a potential hazard or unsafe
practice could cause personal injury or equipment damage.
"Note" Indicates undesirable situations where a potential hazard could cause
equipment damage or abnormal operation.

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0.3 Safety Precautions
When evacuating toxic or inflammable gas, there may be danger of leaking gas from
parts besides inlet port. Practice cautionary steps when working any kind of
gases.
After evacuating toxic gases, the inside of pump and pump oil is contaminated
and toxic. Therefore, handle pump with care during maintenance.
Do not overhaul or repair this pump.0nly authorized maintenance personnel should
handle this pump to avoid ignition, abnormal action, and electric shock.
Switch off power before checking or repairing the pump to avoid any problems
(electric shock or personal injury) caused by suddenly starting up.
Connect an electrical wire cord to ground potential terminal tightly to avoid
electric shock caused by mechanical trouble or electrical leakage.
Do not plug exhaust port or place any materials inside of exhaust port, because
it will reduce pumping speed during operation. Pump explosion, oil level gauge
bursting, or motor over loading are consequences of excessive pressure inside
the pump. This pump is not a compressor. The maximum pressure inside this pump
is 0.03 MPa (GAUGE).

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Do not use this pump in an explosive or flammable atmosphere. It may cause personal
injuries or fires.
Do not insert objects, fingers, or another pump body parts into the inlet port.
It may cause electric shock, personal injuries, or fires.
Do not touch the motor body, shaft, or shaft coupling joint during operation.
It may cause personal injuries.
Do not place flammable objects around the pump. It may cause fires. Also, do not
place obstacles around the pump so as to obstruct cooling air. Abnormal
temperature rising may cause burns or fires.
Electric wiring should be carried out in accordance with Electric Regulation and
Instructions. Miswriting may cause fires.
Switch off electric power right away in case of a malfunction to prevent any
troubles. In the case of a malfunction, contact your local agent or ULVAC
KIKO,Inc. Sales and Service Center immediately.
Do not start the pump without pump-oil. Failing to do so will lead to pump
destruction.

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0.4 Acceptance and Store of Product
0.4.1 Acceptance of Product
We delivered the pump with the utmost care. After unpacking, please check up and
confirm items as shown below，
(1) The pump is what you ordered.
(2) Spare parts (single use of pump oil, optional parts)
(3) Any damages during transportation.
(4) Any loose screws and nuts.
If you find any abnormal circumstances, please contact your local ULVAC KIKO,Inc.
Sales or Service Center.
0.4.2 Store of Product, Installation, Operating condition
This pump is a type of precision equipment; therefore, it is necessary to satisfy
the following items for store product.
(1) Operational temperature and humidity : 7～40°C , 85 % RH >
(2) Installation place should be at an altitude no higher than 1000m above sea levels
for storing or operation.
(3) Required conditions while storing or operating
a. Do not use corrosive or explosive gases.
b. No areas with high moisture.
c. No areas with dust particles.
d. Use indoors only.
e. Do not pile up, or lay on its side.
f. Keep out of direct sun light.
g. Keep away from heat source.
Do not treat with force, or lay on its side. It may cause damage.

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0.5 Protective Precautions
The pump is provided with a single-phase 100V (50/60Hz) motor.
An overload protector (manually reset thermal protector) is incorporated.
The use of another protective device (such as an earth leakage breaker) in addition to the
overload protector is recommended.
Do not apply any voltages other than specifically rated for the motor of this
pump. The over-load protector does not operate normally, consequently it may
cause burning the motor or firing.

Contents‐1
CONTENTS
0.Preface ・・・・・・・・・01
0.1 Before Using This Pump ・・・・・・・・・01
0.2 Safety Precautions (General Expression) ・・・・・・・・・02
0.3 Safety Precautions ・・・・・・・・・03
0.4 Acceptance and Store of Product ・・・・・・・・・05
0.4.1 Acceptance of Product ・・・・・・・・・05
0.4.2 Store of Product, Installation, Operating condition ・・・・・・・・05
0.5 Protective Precautions ・・・・・・・・・06
1.For Safety Operation ・・・・・・・・・ 1
1.1 Hazardous of Product and Safety Precautions ・・・・・・・・・ 1
1.1.1 DANGER Leakage of hazardous gases and materials ・・・・・・・・・ 1
1.1.2 WARNING Electric shock ・・・・・・・・・ 1
1.1.3 WARNING Explosion ・・・・・・・・・ 2
1.1.4 CAUTION High Temperature ・・・・・・・・・ 2
1.2 Material Safety Data Sheet(MSDS) ・・・・・・・・・ 2
2. General Description of the Pump ・・・・・・・・・ 3
2.1 Principal Features ・・・・・・・・・ 3
2.2 Dimensional Drawings(G-20DA,25SA,50DA,50SA) ・・・・・・・・・ 4
3. Setting up ・・・・・・・・・ 6
3.1 Installation ・・・・・・・・・ 6
3.2 Oil charging ・・
・・・・・・・ 6
3.3 Vacuum Tubing ・・
・・・・・・・ 8
3.4 Electric wiring ・・
・・・・・・・ 9
3.5 Fluctuations in the power voltage and frequency ・・・・・・・・・10

Contents‐2
4. Operational Instructions ・・・・・・・・・11
4.1 Operational Precautions ・・・・・・・・・11
4.2 Start up Operation ・・
・・・・・・・12
4.3 Shut down Operation ・・
・・・・・・・13
4.4 Oil shut off valve ・・・
・・・・・・13
4.5 Start up procedures in cold climate ・・・・・・・・・14
4.6 Set up oil mist trap (option) ・・・・・・・・・14
4.7 Restriction in an operation of the oil mist trap (option) ・・・・・・・14
5. Specification ・・・・・・・・・15
5.1 Ultimate Pressure ・・・・・・・・・15
5.2 Pumping Speed ・・・
・・・・・・15
5.3 Required Electricity ・・・・
・・・・・15
6. Maintenance, Inspection, Repair ・・・・・・・・・17
6.1 Maintenance ・・・・・・・・・17
6.2 Scheduled Inspection ・・・
・・・・・・17
6.3 Oil Change ・・・
・・・・・・19
6.4 Replacement of Spider in Coupling ・・・
・・・・・・21
6.5 Trouble Check List ・・・
・・・・・・22
7. Product Disposal ・・・・・・・・・24
8. Main Expendable parts ・・・・・・・・・25
8.1 Main Expendable Parts List ・・・・・・・・・25
8.2 Disassembly Drawings(G-20DA,25SA,50DA,50SA) ・・・・・・・・・26
Warranty
Material Safety Data Sheet(MSDS)
Check sheet for repair
Sales and Service Centers

Contents‐3
DRAWING AND TABLE LIST
Fig- 1 General Assembly Drawing of G-20DA ・・・・・・・・・ 4
Fig- 2 General Assembly Drawing of G-25SA ・・・・・・・・・ 4
Fig- 3 General Assembly Drawing of G-50DA･50SA ・・・・・・・・・ 5
Fig- 4 Oil Charge to Rotary Vacuum Pump ・・・・・・・・・ 7
Fig- 5 Vacuum Pumping System Diagram ・・・・・・・・・ 8
Fig- 6 Change region of the voltage and frequency ・・・・・・・・・10
Fig- 7 Characteristics of Vacuum pumping speed ・・・・・・・・・16
Fig- 8 Characteristics of Motor power ・・・・・・・・・16
Fig- 9 Replacement of Spider in Coupling ・・・・・・・・・21
Fig-10 Disassembly Drawing of G-20DA･50DA ・・・・・・・・・26
Fig-11 Disassembly Drawing of G-25SA ・・・・
・・・・・27
Fig-12 Disassembly Drawing of G-50SA ・・・・・・・・・28
Table-1 Specification ・・・・・・・・・ 3
Table-2 Scheduled Inspection ・・・・・・・・・18
Table-3 Trouble Check List ・・・・・・・・・22
Table-4 Main Expendable Parts List ・・・・・・・・・25
Attached table: Material Safety Data Sheet for Vacuum Pump Oil SMR-100

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1.For Safety Operation
1.1 Hazardous of Product and Safety Precautions
Before operating or inspecting the pump, read this manual carefully. And pay attention to
ascertain the detail of potential hazardous and preventive procedure so that must be operated
or inspected the pump.
1.1.1 Leakage of hazardous gases and materials
Cause Preventive Procedure
Leakage of toxic or inflammable gases. ⇒Before evacuating gases to the pump inlet,
dilute them to safety level.
⇒① After wearing suitable protector for
evacuating hazardous materials, check or
abolish the pump.
② Before checking or disposing the pump,
non-hazardous treatment must be requested
for the authorized professional
specialist, then check or the pump.
Injuries of skin by direct contact with
contaminated oils or adhered hazardous
materials of the pump body when
checking or disposing dispose the
pump.
③ Disposal must be requested for the
professional specialist authorized by the
administration.
1.1.2 Electric shock
Cause Preventive Procedure
⇒① Switch off power certainly before electric
wiring Connect electrical wire cords to
ground potential terminals tightly.
② Switch off power before inspection or
removing.
Electric shock by touching electrical
bare portion of the motor when electric
power is on.
③ Do not insert objects, fingers, or any thin
bars into the inlet port.

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1.1.3 Explosion
Cause Preventive Procedure
Pump explosion is consequence of
excessive pressure inside the pump.
⇒The maximum pressure inside the pump is 0.03
MPa (GAUGE).
If inlet pressure of the pump is higher than
0.03 MPa (GAUGE), eliminate any objects which
may cause obstruct gas flowing to the inlet
port. When using oil mist trap, exchange or
clean them to avoid gas flowing.
1.1.4 High Temperature
Cause Preventive Procedure
① Temperature of the pump is high as shown
below
pump body → 70 ～ 80 ℃
motor → 70 ～ 80 ℃
Burn at high temperature. ⇒
② High temperature surface of the pump may
cause to burn as a result of direct skin
contact by accident. Do not touch the pump
body during operation. Inspection should be
carried out after stopping and cooling down
the pump.
1.2 Material Safety Data Sheet (MSDS)
The chemical material, which is applied or possible to contact when operating this pump are
described. Read this manual carefully to understand characteristics of the chemical material
(vacuum pump oil) which is described on MSDS sheet. When applying other vacuum pump oils besides
the description in this manual, contact your local ULVAC KIKO,Inc. Sales and Service Center.
MSDS presents the reference information of hazardous chemical material to keep
safety precautions. When handling the pump oil, it is necessary to take proper
and practical treatments, which are adapted handling the oil. After understanding
the above mention, these treatments must be done. Therefore, MSDS is a not safety
warranty.

‐3‐
2.General Description of the Pump
2.1 Principal Features
This oil rotary vacuum pump is a sliding vane type (so called Gaede type), with direct driven
motor. As it is a small sized, lightweight, and simple structure, it is easy to maintain or
over-haul.
Table-1 Specification
Model G-20DA G-25SA G-50DA G-50SA
Type Sliding vane
2 stages
Sliding vane
1 stages
Sliding vane
2 stages
Sliding vane
1 stages
50Hz 20 20 50 50
Pumping speed
L/min 60Hz 24 24 60 60
Ultimate pressure Pa 1.3×10-1 9.3 1.3×10-1 9.3
Motor W,（Poles） 100（4） 200（4）
50Hz 3.7 5.6
Full load current
A 60Hz 3.0 4.8
50Hz 1,450 1,440
Motor revolution
ｒ/min 60Hz 1,740 1,730
Recommended SMR-100
Pump oil
Capacity, (mL) 180 230 260 360
Note 1. Ultimate pressure indication by McLeod gauge.
For G-20DA,50DA : 1 order higher pressure indication by Pirani gauge.
For G-25SA,50SA : same pressure indication by Pirani gauge.
2. Vapor pressure, viscosity, or characteristics of vacuum pump oils are different
respectively. Our recommended oil is SMR-100.

‐4‐
2.2 Dimensional Drawings
Motor ; Single phase, 100V(50/60Hz), 100W, 4Poles,Split phase starting
Weight ; 9.0 kg(with motor)
Fig-1 General Assembly Drawing of G-20DA
Motor ; Singhle phase, 100V(50/60Hz), 100W, 4Poles, Split phase starting
Weight ; 8.5kg(with motor)
Fig-2 General Assembly Drawing of G-25SA

‐5‐
Motor ; Singhle phase, 100V(50/60Hz), 200W, 4Poles, Split phase starting
Weight ; 11.0kg(G-50DA･50SA : with motor)
Fig-3 General Assembly Drawing of G-50DA･50SA

‐6‐
3. Setting up
3.1 Installation
Installation must be done at a place of low moisture, low dust particle, and also level. The
layout arrangement should be considered for setting up, overhaul, checking, or cleaning the
pump. When setting up the pump in any systems, pay attention to temperature in atmosphere.
Mount rubber isolator to absorb vibration from the pump. On the environmental condition, refer
to ｢0.4.2 Store of Product｣.
Do not tilt, lay its side, or operate up side down. It may cause damage. The pump
must be placed on a level place in an upright position as shown in Fig-1, 2, 3.
3.2 Oil charging
Remove the oil-filling plug, and then fill the oil (one time charge) to the pump or recommended
oil (SMR-100) up to specified quantity through the oil filling port. In first oil charging,
pour the oil up to maximum scale of oil gauge. Then, attach the exhaust port. (see Fig-4)
Oil quantity must be checked or adjusted to keep the oil quantity is always in the range of
oil gauge during operating the pump.
Improper oil quantity may cause the performance deterioration of the pump, and also may cause
damage. When oil quantity is out of gauge scale ultimate pressure become higher, and it may
cause bubbling sound like "poko poko".

‐7‐
Fig-4 Oil Charge to Rotary Vacuum Pump
① Wear protective rubber gloves or goggles.
② Before charging oils ,read the 「1.2 Material Safety Data Sheet(MSDS)」. When
the contaminated oil touching the skin or coming into the eye accidentally,
follow the item first-aid-treatment of「Material Safety Data Sheet(MSDS)」.
Do not apply other vacuum pump oils besides our recommended. If applying other
vacuum pump oils, it may cause the performance deterioration or shortening the
lifetime of the pump.

‐8‐
3.3 Vacuum Tubing
(1) Clean inner surfaces of vacuum vessel, tubing and valve. Then, after eliminating water
moisture, small particle, dust or rust carefully, connect tube to the pump.
If evacuating small size powder or dust particle, vacuum pump may cause trouble.
(2) Install the shut off valve (A) and the pump vent valve (B) in between the pump inlet port
and the vessel as shown in Fig-5.
Fig-5 Vacuum Pumping System Diagram
(3) Vacuum tubing between inlet port and another port is provided with vacuum rubber hose.
Do not eliminate mesh-filter for preventing different objects come into the inlet
port of the pump.
C
h
a
m
b
e
r
(A)
Shut off valve
Vent valve
(B)
Pump

‐9‐
3.4 Electric wiring
(1) This pump has performed beforehand electric wiring by the side of a pump.
(2) Plug the power wire cord in the power outlet of 100V, single phase.
(3) The over-load protector (thermal protector, manual reset type) is provided for this pump.
Switch off power before electric wiring. Never connect electric wire cord when
power line is hot. This may cause electric shock.
Perform electric wiring correctly in accordance with the “Electric Equipment
Technical Standard” and “Internal Wiring Regulation.” Incorrect wiring will
result in fire.
Electric wiring should be carried out in accordance with Electric Regulation and
Standard. Miss wiring may cause fire.

‐10‐
3.5 Fluctuations in the power voltage and frequency
Standard: Rotation electricity machine general rules
JIS C 4034-1:1999，JEC-2137-2000
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).
Fig-6 Change region of the voltage and frequency