Ulvac GC-25Sa User manual

No．16100-2-01-3
INSTRUCTION MANUAL
OIL ROTARY VACUUM PUMP
MODEL ： GC-25Sa
MODEL ： GC-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.
2-7-19 Shin-yokohama, Kohoku-ku, Yokohama City, Kanagawa 222-8522
(3F Tenko Bldg. 50)
Tel: [phone]

‐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.

‐02‐
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.

‐03‐
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).

‐04‐
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.

‐05‐
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.

‐06‐
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(GC-25Sa,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. Operating Instruction ・・・・・・・・・11
4.1 Operating Precautions ・・・・・・・・・11
4.2 Start up Operation ・・・・・・・・・12
4.3 Shut down Operation ・・・・・・・・・13
4.4 Start up procedures in cold climate ・・・・・・・・・14
4.5 Set up oil mist trap (option) ・・・・・・・・・14
4.6 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. Warranty ・・・・・・・・・24
9. Main Expendable parts ・・・・・・・・・25
9.1 Main Expendable Parts List ・・・・・・・・・25
9.2 Disassembly Drawings(GC-25Sa,50Sa) ・・・・・・・・・26
Attached Sheets (1) Material Safety Data Sheet(MSDS)
(2) Check sheet for repair
(3) Sales and Service Centers

Contents‐3
DRAWING AND TABLE LIST
Fig- 1 General Assembly Drawing of GC-25Sa ・・・・・・・・・ 4
Fig- 2 General Assembly Drawing of GC-50Sa ・・・・・・・・・ 5
Fig- 3 Oil Charge to Rotary Vacuum Pump ・・・・・・・・・ 7
Fig- 4 Vacuum Pumping System Diagram ・・・・・・・・・ 8
Fig- 5 Change region of the voltage and frequency ・・・・・・・・・10
Fig- 6 Characteristics of Vacuum pumping speed ・・・・・・・・・16
Fig- 7 Replacement of Spider in Coupling ・・・・・・・・・21
Fig- 8 Disassembly Drawing of GC-25Sa・50Sa ・・・・・・・・・26
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

‐1‐
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.

‐2‐
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
GC-25Sa GC-50Sa
Type Sliding vane
1 stages
Sliding vane
1 stages
50Hz 20 50
Pumping speed
(L/min) 60Hz 24 60
Ultimate pressure Pa 9.3 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 1,450
Motor revolution
(ｒ/min) 60Hz 1,740 1,740
Recommended SMR-100
Pomp oil Capacity
(mL) 230 360
Note 1. Ultimate 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 ; 8.5 kg(with motor)
Fig-1 General Assembly Drawing of GC-25Sa

‐5‐
Motor ; Singhle phase, 100V(50/60Hz), 200W, 4Poles, Split phase starting
Weight ; 11.0kg(with motor)
Fig-2 General Assembly Drawing of GC-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.
3.2 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-3)
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-3 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-4.
Fig-4 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.
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. 5 Change region of the voltage and frequency