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