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05 

 

 
 

 

 

Operation 

(14) 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. 

(15) Inserting fingers or objects into the motor inlet may result in electric shock, injury, or fire. 
(16) 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 

(17) The pump should be dismantled or repaired only by a repair technician trained by the 

manufacturer. 

(18) To prevent ingestion of microscopic particles resulting from wear of components, use a dust 

mask and gloves during repair work. 

 

 

 

 

Installation 

(1)  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. 

(2)  To prevent back injury, always use both hands to lift pumps. 
(3)  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. 

 

Operation 

(4)  Do not use in applications involving organ transplants, or contact with body fluids or living 

tissue. 

(5)  Touching rotating components (eg 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. 

 

 

 

!

Warning

 

 

!

Caution

 

Summary of Contents for DTC-41

Page 1: ...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 manua...

Page 2: ...llation 3 3 5 Piping 3 3 6 Storage 4 4 Cautions for Operation 4 4 1 Cautions for Operation 4 4 2 Operation of the Thermal Protection Relay 4 4 3 Starting in Cold Weather 4 5 Pump Performance 5 5 1 Pre...

Page 3: ...41 2 Fig 2 2 DTC 41K 2 Fig 3 1 Example of Piping Used When Evacuating a Vessel 4 Table 1 1 Product Specifications 1 Table 6 1 Consumables List 6 Table 6 2 Locations for Maintenance and Inspection 7 Ta...

Page 4: ...quipment 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...

Page 5: ...ssing Contact your agent or the sales division of the manufacturer if there are any problems with the pump Customers purchasing the DTC 41K Do not grip or pull the tube on the top of the pump when rem...

Page 6: ...r 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 Some components reach surface te...

Page 7: ...ve the power cord from the wall socket 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 w...

Page 8: ...age 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...

Page 9: ...shocks or tipped over on its side 2 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 Applications 3 This pump is not designed to be c...

Page 10: ...at high ambient temperatures will dramatically reduce the life of the pump 10 Back pressure at the outlet while the pump is starting may overload the motor 11 The thermal protection relay operates whe...

Page 11: ...t come in contact with the pump Any chemical including the following which comes into contact with the pump should be wiped off immediately Acetone Ethyl ether Ethyl acetate Animal fats 5 Ensure that...

Page 12: ...t if the motor temperature rises due to a pump fault which prevents rotation or if load becomes excessive 2 It is recommended that additional protective devices eg earth leakage breaker motor breaker...

Page 13: ...ion rubbers to isolate the pump from vibrations in the equipment See 3 2 Environmental Conditions for Installation Storage and Operation for details 3 4 Checking Operation After Installation 1 Remove...

Page 14: ...e the power cord from the outlet and contact the manufacturer Note that the pump will be very hot and should not be touched 2 The pump operates automatically when temperature drops Shut off the power...

Page 15: ...sed pressure 2 Leaks into the vacuum system introduce other gases resulting in increased pressure 5 2 Evacuation Rate The maximum rate of evacuation is reached when air is introduced and decreases sli...

Page 16: ...er the first 3000 hours of operation and replace and clean in accordance with the Replacement and Cleaning Guide on the following page Refer to 6 4 Replacing and Cleaning Consumables for procedures Re...

Page 17: ...d Visual inspection O rings Hard cracked or stretched Visual inspection Bearings Abnormal noises Listen 6 4 Replacing and Cleaning Consumables See Caution 11 P06 Always use a mask and gloves when repl...

Page 18: ...truss head screws M4 x 10 and remove the top panel Photo 3 4 Remove the eight hexagon socket head cap screws M6 x 25 and remove the pump head as shown in Photo 4 Caution Gripping pushing or bending t...

Page 19: ...emoving the diaphragms it is convenient to insert the pump head cover hexagon socket head cap screw M6 x 25 into the threaded hole in the connecting rod 8 Remove any foreign matter from the threaded h...

Page 20: ...inlet and outlet pipes 1 2 DTC 41K Replace diaphragms in accordance with 1 1 DTC 41 steps 4 12 2 Replacing Inlet and Outlet Valves simultaneous replacement of both diaphragms is recommended Use tools...

Page 21: ...from the casing and then remove the valve retainer in accordance with steps 1 and 2 in 2 Replacing inlet and outlet valves 2 Remove the O rings Photo 14 15 16 3 Clean the inlet and outlet pipes pump h...

Page 22: ...small for capacity of vacuum vessel 1 Select another pump 2 Pressure measurement is incorrect 2 Measure the pressure correctly 5 1 3 Vacuum gauge is unsuitable 3 Measure with a calibrated vacuum gaug...

Page 23: ...e and inspection etc d Malfunctions caused by modifications or repairs carried out by a party other than the manufacturer or by a service company not approved by the manufacturer e Malfunctions caused...

Page 24: ...Industrial Safety and Health Law designates particular substances as the materials to be notified 2 Usage Status Operation Method Approx hours per day years and months Continuous Operation Intermitte...

Page 25: ...6 6397 2286 ULVAC KIKO Inc https ulvac kiko com en Please contact us for products Service Base or other Inquiries from here ULVAC Inc Components Division 2500 Hagisono Chigasaki Kanagawa 253 8543 Japa...

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