The new XKC series high-vacuum oil diffusion pumps can achieve a high vacuum range of 1.3×10² to 10 Pa. Their main features include: a wide operating range, with a high pumping speed even at 1.3×10² Pa; a high critical fore-vacuum pressure; and a low oil carryover rate of 1.5×10⁻³ mg/cm³·min; rapid startup, equipped with a standard oil level sight glass and a built-in water-cooled oil seal. It is the ideal vacuum source for vacuum heat treatment, brazing, and vacuum coating applications, featuring a five-stage pump core.
Main Technical Specifications of the XKC Series High-Vacuum Oil Diffusion Pumps
| Specifications/Model |
XKC-650 |
XKC-720 |
XKC-800 |
XKC-1200 |
| Maximum Pressure (Pa) |
≤5x10﹣⁵ |
| Pumping Speed (L/s) |
≥18400 |
≥23000 |
≥28000 |
≥60000 |
| Critical Fore-vacuum Pressure (Pa) |
≥60 |
| Oil Return Rate (mg/cm²·min) |
≤5x10﹣³ |
| Heating Power (kW) |
12 |
12 |
18 |
30-35 |
| Power Supply Voltage (V) |
380 |
| Pump Oil Grade |
KS-3 diffusion pump oil or 275 silicone oil |
| Pump Oil Volume (L) |
7 |
8 |
10 |
20-25 |
| Recommended Fore-vacuum Pump Speed (L/s) |
140 |
140 |
300 |
300 |
| Dimensions (L x W x H) |
1155x750x1275 |
1155x750x1315 |
1253x1067x1740 |
2420 x1500 x2200 |
| Weight (kg) |
430 |
450 |
820 |
1250 |
XKC Series High-Vacuum Oil Diffusion Pump Pumping Speed Curves

XKC Series High-Vacuum Oil Diffusion Pump Connection Dimensions
| Specifications/Model |
XKC-650 |
XKC-720 |
XKC-800 |
XKC-1200 |
| DN |
650 |
720 |
800 |
1200 |
| D1 |
750 |
850 |
920 |
1360 |
| D2 |
720 |
800 |
880 |
1310 |
| A |
750 |
1000 |
950 |
1350 |
| L |
600 |
600 |
870 |
1100 |
| nl-∅1 |
20-∅14 |
20-∅23 |
20-∅21 |
28-∅23 |
| dn |
150 |
150 |
180 |
300 |
| dl |
220 |
220 |
280 |
380 |
| d2 |
195 |
195 |
250 |
350 |
| n2-∅2 |
8-∅12 |
8-∅12 |
8-∅14 |
8-∅14 |
| H |
1275 |
1315 |
1660 |
2200 |
XKC Series High-Vacuum Oil Diffusion Pumps