The K T series high-vacuum oil diffusion pumps are the primary equipment used to achieve high and ultra-high vacuums ranging from 10⁻¹ to 10⁻⁵ Pa. These pumps feature a convex chamber design, which increases pumping speed by approximately 30% compared to the K series, and are equipped with a four-stage pump core.
Main Technical Specifications of the K T Series High-Vacuum Oil Diffusion Pumps
| Specifications/Model |
KT-300 |
KT-400 |
KT-600 |
KT-650 |
| Maximum Pressure (Pa) |
≤5x10﹣⁵ |
| Pumping Speed (L/s) |
≥4400 |
≥8000 |
≥16000-16500 |
≥21200 |
| Critical Fore-vacuum Pressure (Pa) |
≥40 |
≥60 |
| Oil Return Rate (mg/cm²·min) |
≤5x10﹣³ |
| Heating Power (kW) |
3 |
4.5 |
8.4 |
15 |
| Power Supply Voltage (V) |
380 |
| Pump Oil Grade |
KS-3 diffusion pump oil or 275 silicone oil |
| Pump Oil Volume (L) |
1.5 |
3.2 |
7 |
8 |
| Recommended Fore-vacuum Pump Speed (L/s) |
30 |
70 |
150 |
300 |
| Dimensions (L x W x H) |
600x435x735 |
770x555x900 |
1200x 780 x1350 |
1285x750 x 1290 |
| Weight (kg) |
85 |
170 |
400 |
480 |
Pump Speed Curves for the K T Series High-Vacuum Oil Diffusion Pumps

K T Series High-Vacuum Oil Diffusion Pumps: Connection Dimensions
| Specifications/Model |
KT-300 |
KT-400 |
KT-600 |
KT-650 |
| DN |
300 |
400 |
600 |
650 |
| D1 |
380 |
500 |
710 |
750 |
| D2 |
350 |
465 |
670 |
720 |
| A |
330 |
440 |
660 |
800 |
| L |
280 |
360 |
600 |
600 |
| nl-∅1 |
8-∅14 |
8-∅18 |
12-∅21 |
20-∅14 |
| dn |
80 |
100 |
150 |
150 |
| dl |
145 |
170 |
220 |
220 |
| d2 |
125 |
145 |
195 |
195 |
| n2-∅2 |
4-∅9 |
4-∅12 |
8-∅12 |
8-∅12 |
| H |
720 |
890 |
1340 |
1315 |
K T Series High-Vacuum Oil Diffusion Pumps