2XZ Series Rotary vane Vacuum Pump
Construction:
    2XZ type rotary vane vacuum pump is two stage high speed direct drive rotary vane vacuum pump (in the following called "the pump" for short). Its pumping principle is as same as that of 2X type pump. Rotors are eccentrically mounted within the cylindrical housing of the stators and vanes are fitted freely inside the respective slots of the rotor. When the rotor rotates at high speed, banes in the rotor slot are urged outwards by centrifugal force as well as by spring force so as to keep close contact at their tips with the stator wall throughout rotation. Thus the inlet port and outlet port on the stator are separated by them. The volume of the space through inlet pipe, meanwhile the volume of the space leading to the outlet port diminishes progressively and periodically to compress the gas previously sucked. By means if gas pressure and oil pressure exhaust valve on the outlet port is opened to expel gas out of the pump through the valve, then vacuum is obtained at the intake side of the pump. Fig. 1 shows the working principle of a single stage pump. Double stage pump is the arrangement of two single stage pumps is series. When the intake pressure is higher, both stages of the pump may exhaust simultaneously, while at lower suction pressure gas is first expelled out from the first stage to second stage, then from second stage exhausts to the open air.
    2XZ type pump is equipped with gas-ballast valve. Its function is to fill the exhaust space with certain amount of air, when the valve is open, so as to reduce the proportion of the partial pressure of vapor in the total discharge pressure. As the partial pressure of vapor is lower than that od the saturated vapor pressure corresponding to the working temperature to the pump, vapor can be discharged from the pump with the filled air in order to avoid condensation of vapor in useful lift of oil. However the ultimate vacuum of the pump shall drop, and the temperature of the pump shall rise when the gas-ballast valve is open.
    2XZ type pump has the outstanding achievements of small size, less weight, quiet operation and easy to start. Besides devices to prevent from sucking back of oil and leakage of oil from axle sealing to contaminate environment are also provided.
Field of Application:
1. The pump is one of the basic equipment to exhaust a sealed vessel. It can be used either independently as main pump and can also be served as fore pump for booster pump diffusion pump and molecular pump or as holding pump for a vacuum system and as a pre-pumping for different kinds of the pumps, so it is can be applied in electro-vacuum industries, vacuum flask manufacturing, vacuum welding and as an accessory to those fine gauges or meters where vacuum is required. It is more suitable for laboratory use because of its small size, less weight and quiet operation.
2. The pump is allowed to work continuously for many hours at a stretch under atmospheric temperature of 5-40 degree C and intake pressure below 1230pa. While the pumped gas containing moisture of a relative humidity of more than 90% gas-ballast valve should be open.
3. With the inlet port widely opened to atmosphere the pump is not allowed to work more than one minute.
4. The pump is not suitable for pumping over-oxidized, poisonous, explosive and corrosive gas as well as gases which react chemically with the pump oil or contain particles of dust.
Model Selection:
Model
2XZ-0.25
2XZ-0.5
2XZ-1
2XZ-2
2XZ-4
2XZ-6
2XZ-8
2XZ-15
2XZ-25
Pumping speed
m³/h(L/S)
50(HZ)
0.9(0.25)
1.8(0.5)
3.6(1)
7.2(2)
14.4(4)
21.6(6)
28.8(8)
54(15)
90(25)
60(HZ)
1.1(0.3)
2.1(0.6)
4.3(1.2)
8.6(2.4)
17.2(4.8)
26(7.2)
34.5(9.6)
64.8(18)
108(30)
Limiting Pressure(pa)
≤6×10-1
≤6×10-2
≤6×10-2
≤6×10-2
≤6×10-2
≤4×10-2
≤4×10-2
≤4×10-2
≤4×10-2
50HZ
Speed(r/min)
1400
1400
1400
1400
1400
1400
1400
1400
1400
60HZ
Speed(r/min)
1720
1720
1720
1720
1720
1720
1720
1720
1720
Motor power(kw)
0.12
0.18
0.25
0.37
0.55
0.75
1.1
1.5
2.2
Voltage(v)
220
220
220
220/380
220/380
380
380
380
380
Air inlet diameter(mm)
Φ15
Φ20
Φ20
Φ30
Φ30
KF-40
KF-40
KF-40
KF-50
Noise (dBA)
63
65
65
68
68
68
70
70
72
Oil volume(L)
0.5
0.6
0.7
1
1.2
2
3
4
5
Dimension(mm)
403×130×240
447×168×260
468×169×260
514×168×282
565×168×282
565×200×342
650×240×430
700×240×430
770×240×430
N.W/G.W(kg)
16/15
17/16
18/17
22/20
24/22
50/40
70/60
86/75
98/85
Structure Drawing:
Fig.1
1. Inlet port    2. Filter net  3. Oil baffle  4."O"ring  5. Spring  6. Vane
7. Rotor  8. Stator  9. Oil Box  10. Vacuum oil  11. Exhaust valve plate
12. Screw plug for oil drain  13. Oil gas  14. Screw plug for oil filling Â
15. Gas-ballast valve  16. Outlet port  17. Handle  18. Coupling
Construction:
    2XZ type rotary vane vacuum pump is two stage high speed direct drive rotary vane vacuum pump (in the following called "the pump" for short). Its pumping principle is as same as that of 2X type pump. Rotors are eccentrically mounted within the cylindrical housing of the stators and vanes are fitted freely inside the respective slots of the rotor. When the rotor rotates at high speed, banes in the rotor slot are urged outwards by centrifugal force as well as by spring force so as to keep close contact at their tips with the stator wall throughout rotation. Thus the inlet port and outlet port on the stator are separated by them. The volume of the space through inlet pipe, meanwhile the volume of the space leading to the outlet port diminishes progressively and periodically to compress the gas previously sucked. By means if gas pressure and oil pressure exhaust valve on the outlet port is opened to expel gas out of the pump through the valve, then vacuum is obtained at the intake side of the pump. Fig. 1 shows the working principle of a single stage pump. Double stage pump is the arrangement of two single stage pumps is series. When the intake pressure is higher, both stages of the pump may exhaust simultaneously, while at lower suction pressure gas is first expelled out from the first stage to second stage, then from second stage exhausts to the open air.
    2XZ type pump is equipped with gas-ballast valve. Its function is to fill the exhaust space with certain amount of air, when the valve is open, so as to reduce the proportion of the partial pressure of vapor in the total discharge pressure. As the partial pressure of vapor is lower than that od the saturated vapor pressure corresponding to the working temperature to the pump, vapor can be discharged from the pump with the filled air in order to avoid condensation of vapor in useful lift of oil. However the ultimate vacuum of the pump shall drop, and the temperature of the pump shall rise when the gas-ballast valve is open.
    2XZ type pump has the outstanding achievements of small size, less weight, quiet operation and easy to start. Besides devices to prevent from sucking back of oil and leakage of oil from axle sealing to contaminate environment are also provided.
Field of Application:
1. The pump is one of the basic equipment to exhaust a sealed vessel. It can be used either independently as main pump and can also be served as fore pump for booster pump diffusion pump and molecular pump or as holding pump for a vacuum system and as a pre-pumping for different kinds of the pumps, so it is can be applied in electro-vacuum industries, vacuum flask manufacturing, vacuum welding and as an accessory to those fine gauges or meters where vacuum is required. It is more suitable for laboratory use because of its small size, less weight and quiet operation.
2. The pump is allowed to work continuously for many hours at a stretch under atmospheric temperature of 5-40 degree C and intake pressure below 1230pa. While the pumped gas containing moisture of a relative humidity of more than 90% gas-ballast valve should be open.
3. With the inlet port widely opened to atmosphere the pump is not allowed to work more than one minute.
4. The pump is not suitable for pumping over-oxidized, poisonous, explosive and corrosive gas as well as gases which react chemically with the pump oil or contain particles of dust.
Model Selection:
Model
2XZ-0.25
2XZ-0.5
2XZ-1
2XZ-2
2XZ-4
2XZ-6
2XZ-8
2XZ-15
2XZ-25
Pumping speed
m³/h(L/S)
50(HZ)
0.9(0.25)
1.8(0.5)
3.6(1)
7.2(2)
14.4(4)
21.6(6)
28.8(8)
54(15)
90(25)
60(HZ)
1.1(0.3)
2.1(0.6)
4.3(1.2)
8.6(2.4)
17.2(4.8)
26(7.2)
34.5(9.6)
64.8(18)
108(30)
Limiting Pressure(pa)
≤6×10-1
≤6×10-2
≤6×10-2
≤6×10-2
≤6×10-2
≤4×10-2
≤4×10-2
≤4×10-2
≤4×10-2
50HZ
Speed(r/min)
1400
1400
1400
1400
1400
1400
1400
1400
1400
60HZ
Speed(r/min)
1720
1720
1720
1720
1720
1720
1720
1720
1720
Motor power(kw)
0.12
0.18
0.25
0.37
0.55
0.75
1.1
1.5
2.2
Voltage(v)
220
220
220
220/380
220/380
380
380
380
380
Air inlet diameter(mm)
Φ15
Φ20
Φ20
Φ30
Φ30
KF-40
KF-40
KF-40
KF-50
Noise (dBA)
63
65
65
68
68
68
70
70
72
Oil volume(L)
0.5
0.6
0.7
1
1.2
2
3
4
5
Dimension(mm)
403×130×240
447×168×260
468×169×260
514×168×282
565×168×282
565×200×342
650×240×430
700×240×430
770×240×430
N.W/G.W(kg)
16/15
17/16
18/17
22/20
24/22
50/40
70/60
86/75
98/85
Structure Drawing:
Fig.1
1. Inlet port    2. Filter net  3. Oil baffle  4."O"ring  5. Spring  6. Vane
7. Rotor  8. Stator  9. Oil Box  10. Vacuum oil  11. Exhaust valve plate
12. Screw plug for oil drain  13. Oil gas  14. Screw plug for oil filling Â
15. Gas-ballast valve  16. Outlet port  17. Handle  18. Coupling