The new KC series high-vacuum oil diffusion pumps can achieve a high vacuum range of 1.3×10⁻¹ to 10⁻⁵ Pa. Key features include a wide operating range, with a high pumping speed even at 1.3×10⁻¹ Pa; a high critical fore-vacuum pressure; and a low oil return rate of 1.5×10⁻³ mg/cm²·min; rapid startup, a standard oil level sight glass, and a built-in water-cooled oil seal. These pumps are the ideal vacuum generation equipment for vacuum heat treatment, brazing, and vacuum coating applications, featuring a five-stage pump core.

| Model Number(mm) |
KC-500 (HS-20) |
KC-630 |
KC-800(HS-32) |
KC-900(HS-35) |
KC-1000 |
| DN |
540 |
630 |
800 |
890 |
1000 |
| D1 |
700 |
750 |
890 |
1060 |
1120 |
| D2 |
635 |
720 |
920 |
980 |
1090 |
| A |
635 |
750 |
673 |
1073 |
1073 |
| L |
584 |
600 |
870 |
810 |
810 |
| n1-01 |
20-018 |
20-014 |
24-014 |
28-022 |
32-015 |
| dn |
150 |
150 |
156 |
200 |
200 |
| d1 |
230 |
220 |
240 |
280 |
280 |
| d2 |
191 |
195 |
/ |
250 |
250 |
| n2-02 |
8-14 |
8-012 |
Caliper Link |
8-14 |
8-014 |
| H |
1220 |
1275 |
1740 |
1845 |
1845 |