2X rotary vane vacuum pump

Model

Extraction speed (L/S)

2X-2

2X-4A

2X-8A

2X-8

2X-15A

2X-15

2X-30

2X-70

2

4

8

15

30

70

mbar

Guanqi Town
Kaiqi Town

Pa(Torr)

6×10^-2(≤5×10^-4)110

6×10^-1(5×10^-3)

(≤1×10)

Electric motor power (KW)

0.37

0.55

1.1

1.5

3

5.5

Temperature rise (℃)

≤40

Inlet diameter (mm)

18

25

40

40

65

80

Speed (r/min)

450

590

420

Oil consumption (L)

0.7

1.0

2.0

2.8

3.0

4.2

Noise dB (A)

68

≤68

≤70

≤75

≤78(～70)

≤80(～75)

Dimensions (cm)

56×31×39

56×34×37

79×43×54

79×53×54

78×50×56

91×65×70

Applicable solenoid valve models

DDC-JQ25

DDC-JQ40

DDC-JQ65

DDC-JQ80

Weight (kg)

58

55

80

110

232

330

Cooling method

natural cooling

water-cooling

Naturally cold

water-cooling

Cooling water volume (L/min)

-

＞0.5

-

＞0.8

＞1

＞2

1. After unpacking, carefully remove the body, spare accessories and instructions, and keep them safe for future use. Remove the filling material and clean the surface dust and dirt of the pump. Count the quantity according to the packing list.

2. The rotary vane vacuum pump is installed in an indoor environment that is clean, well ventilated, and has sufficient light to meet the requirements of Article 4. According to usage, the pump should be installed in a spacious area for easy operation and maintenance. See the external dimensions. It can be placed on a solid and flat ground without the need for a special foundation. If it needs to be fixed, additional screws can be added to secure it firmly to the foundation. The size of the anchor screws is shown in. When using near precision instruments, consideration should be given to adding shock-absorbing devices.

3. The container to be pumped should be connected with a vacuum hose or flange. If a flange is used for connection, there should be a rubber ring groove on the flange, with the form and size shown in the above figure. The diameter of the connected container should not be smaller than the diameter of the pump inlet, and the pipe should be short and the joints should be few, otherwise it will affect the pumping speed. The leakage of the pipeline and joints should be small. The amount of gas in the container being pumped should be adapted to the pumping speed of the pump. It is recommended to install a vacuum valve between the pump and the container being pumped to control the gas flow rate. For the pump, it is recommended to install a vent valve (or solenoid valve) to release air during parking, which can prevent oil return and make it easy to start.

4. Connect the power supply according to the voltage and wiring method shown on the motor label, and it is recommended to use a safety device to prevent overload. Determine the direction of motor rotation, which should be in the direction of the up arrow *. Remove the exhaust plug and install the exhaust hood, or remove the sleeve from the exhaust nozzle. Connect the cooler to the water source.

5. If it is necessary to use a rotary vane vacuum pump to remove toxic and corrosive gases that corrode black metals, gases that cause chemical changes in vacuum oil, and gases that exceed room temperature and have dust, relevant devices such as neutralization, cooling, and filtration should be installed on the intake pipe to cooperate with use, otherwise it will affect the performance and service life. When extracting harmful gases to the human body, corresponding pipelines should be installed to direct the exhaust gas outdoors away from the work area for treatment.

Note: Be careful during installation to prevent iron filings, dirt, dust, etc. from falling inside

72XInstructions for use:

1. Precautions for the operation of rotary vane vacuum pump:
(1) Start intermittently 1-2 times, observe for any abnormal sounds or special vibrations during operation, and only continue running if there are no issues.
(2) Note that the oil level should be between the two oil markings on the sight glass. Excessive oil level can cause difficulties in starting, oil return, fuel injection, and other adverse phenomena, while insufficient oil level can affect the vacuum degree. When the fuel level is insufficient, it should be refueled through the refueling hole. Pay attention to the oil level of the pump that has been stopped for a long time. After running the pump continuously for a few revolutions, the oil level will rise.
(3) Open the cooling water
(4) Open the valve on the pump inlet nozzle, the size of the opening depends on the specific situation.

2. For the first installation, a test run should be conducted first. At this time, the pump should have no improper installation vibration or special impact noise, the motor should not be overloaded, and the oil temperature and ultimate vacuum degree should meet the technical specifications.

3. When stopping, the valve on the intake nozzle should be closed first. If a vent valve is installed, the pump should be vented, and then the power supply should be cut off before stopping the water source.

4. Precautions during use:
(1) Regularly pay attention to the oil level.
(2) Slowly open the valve after starting the pump.
(3) Regularly pay attention to whether the pump is running normally, whether there are any special noises, and whether the motor is operating at overload.
(4) Pay attention to whether the cooling water is interrupted.
(5) Please note that the temperature rise of the pump should not exceed 40 ℃
(6) When the temperature of the rotary vane vacuum pump drops below 5 ℃ after parking, the cold water inside the pump must be completely removed.

82XMaintenance and upkeep:

1. In addition to the 15th item, the rotary vane vacuum pump should also pay attention to the following items during operation:
(1) The rotary vane vacuum pump must be kept clean regularly and no other objects should be placed on the pump.
(2) Pay attention to whether the belt tension is appropriate, and adjust it once every six months.
(3) Check if there is any air leakage at the pipeline joints and promptly eliminate it.
2. After the rotary vane vacuum pump has been working continuously for three months to six months, the oil should be changed once. In areas with high humidity, pumps that work in humid seasons, or those that are heavily polluted by pumped gases, the oil change time should be shortened according to specific circumstances.

The oil change procedures are as follows:

(1) Remove the rotary vane vacuum pump from the vacuum system, raise one end of the chassis motor, open the oil drain plug to drain oil, rotate the vacuum pump, cover the exhaust port, so that all the dirty oil in the chamber is drained from the oil drain port. Then add 100-500ml of new oil from the air inlet and continue to rotate for 5-10 revolutions or more. Clean the interior 3-5 times. After draining the dirty oil, install the oil drain plug, flatten the pump, and add new oil from the air inlet and oil filling hole respectively. The oil change is completed.
(2) When changing the oil, it is not advisable to operate the motor for a long time to avoid excessive jumping and fatigue of the exhaust valve plate.
(3) It is strictly prohibited to use kerosene, gasoline, alcohol, etc. for non disassembly cleaning of the pump.

Note: The oil temperature of the rotary vane vacuum pump should be changed after the oil temperature has increased.

3. If the shutdown time is long, the exhaust hood should be removed and the exhaust plug should be placed, the air inlet should be closed, and the accumulated water should be drained.

92XCauses and elimination methods of faults:

Troubleshooting of general faults in rotary vane vacuum pumps:
1. The vacuum degree of rotary vane vacuum pump is not high:
(1) Pump temperature too high:
(2) If the temperature of the extracted gas is high, the gas should be cooled before entering. B、 If the hard object cylinder is worn due to inhalation, it should be repaired and replaced.
(3) If the cooling water of the pump is insufficient, the cooling water should be turned on or increased. D、 If improper assembly causes single-sided wear, it should be inspected and reinstalled.
(4) The oil level is too low and has not reached the sight glass oil line position. Sufficient oil should be added.
(5) The mixing valve is not tightly closed and leaks air. It should be tightly closed.
(6) Oil quality deteriorates, replace with new oil.
(7) Excessive air leakage is caused by poor oil seal on the end face of the pump. In this case, the exhaust cover should be opened to check if there is a shortage of oil in the B oil tank. If there is no oil, it should be refilled from the oil filling hole to fill the B oil tank with oil
(8) The rotating spring is broken and should be removed and replaced.
(9) The valve plate is damaged and should be replaced.
(10) The sealing ring in the oil seal on the front panel is damaged or the rubber has deteriorated, and should be replaced.
(11) Used for a long time, with significant wear and increased clearance, damaged parts should be repaired or replaced.
(12) The filter screen at the intake is blocked, remove and clean it.

2. Overloading operation of rotary vane vacuum pump motor:
(1) Wen Taigao, handle according to Article 20 (1) (1).
(2) Inhaling iron filings or other mechanical substances causing single-sided wear should be repaired or replaced with worn parts.
(3) Improper assembly causing single-sided wear or biting should be repaired and reassembled.

3. Rotary vane vacuum pump Other:
(1) Oil leakage at the shaft end, worn or improperly assembled sealing ring, should be replaced or reinstalled.
(2) When driving and spraying oil, if the oil level is too high, excess oil should be released, or if the oil blocking devices are broken, they should be readjusted or repaired.
(3) End face oil leakage, due to uneven collision between the front and rear end faces, the end plate is not tightened. The end face should be leveled and tightened.

102XRepair of:

1. Remove the rotary vane vacuum pump from the vacuum system, drain the oil first by removing the low vacuum end (see Figure 3), remove the rear end plate, then remove the low vacuum rotor and key, and then remove the front end plate to remove the vacuum rotor, rotor, spring, etc. Remove the sight glass, exhaust valve, exhaust cover, and thoroughly clean all parts with gasoline or alcohol. When disassembling, attention should be paid to the position, direction, and combination tightness of each part. The disassembled parts should be placed separately and not mixed together or rubbed against each other. Inspect all components for any signs of wear, fraying, or damage, and repair or replace them according to the situation. Pay special attention to the significant scratches found on the front and rear end plates, indicating that the rotor is not perpendicular to the middle partition during assembly. The positioning pin should be adjusted, and if it is too serious, it should be repaired or replaced. Check the clearance of rotary vane vacuum pump: Place the high rotor into the high vacuum chamber and the low rotor into the low vacuum chamber respectively. Use a knife edge ruler and thickness gauge to check the clearance, and the clearance at both ends should be basically equal.
2. Before assembly, it should be cleaned and dried. Assemble according to Figure 4. First, install the high vacuum end, lift the spring rotor and install it into the high rotor, then place it in the high vacuum chamber. Install the front end plate, then install the positioning pin, and tighten the screws evenly. After assembly, ensure that the rotation is flexible, easy, and uniform. Then install the low vacuum rotor and rear end cover, and the groove of the low rotor should be on the side of the rear end plate. Reinstall the exhaust valve, and the exhaust valve plate should be tightly attached to the valve seat before installing other parts.
3. During assembly, attention should be paid to applying vacuum oil to all rotating parts, paying attention to cleanliness, and strictly prohibiting iron filings, mud, sand, dust, and other debris from falling into the pump. The positioning pin should be in good contact, and the installed rotary vane vacuum pump should rotate easily without uneven weight or obstruction. After the final assembly is completed, add oil from the intake nozzle and the oil filling hole respectively. The rotary vane vacuum pump should be filled with oil until it reaches the horizontal line of the sight glass, and then test drive.