The ZL oil diffusion jet pump is a medium-vacuum oil vapor flow pump capable of achieving pressures ranging from 1.3 to 10⁻² Pa. It consists of a diffusion nozzle, a jet nozzle, and other components. Its advantages include a high pumping speed at high vacuum and sufficient critical fore-vacuum pressure at low vacuum. It features a simple structure, no mechanical transmission components, reliable operation, easy maintenance, and a long service life. Primarily configured in medium- and high-vacuum systems as an intermediate stage between the main pump and the fore-vacuum pump, this series of pumps is mainly used in fields such as vacuum metallurgy, vacuum concentration, distillation, and purification.
Main Technical Specifications of the Z L Series Oil Diffusion Ejector Pumps (Oil Booster Pumps)
| Specifications/Model |
ZL-300 |
ZL-300 |
ZL-300 |
ZL-300 |
| Pumping Speed (L/s) |
≥2200 |
≥2200 |
≥2200 |
≥2200 |
| Ultimate Pressure (Pa) |
≤7x10-² |
| Critical Fore-vacuum Pressure (Pa) |
≥140 |
| Heating Power (kW) |
12 |
14-20 |
20 |
30 |
| Power Supply Voltage (V) |
380 |
| Oil Consumption (L) |
18 |
30-33.5 |
75 |
100-105 |
| Inlet Diameter (mm) |
300 |
400 |
600 |
800 |
| Exhaust Diameter (mm) |
65 |
100 |
150 |
200 |
| Recommended Fore-vacuum Pump Speed (L/s) |
70 |
150 |
300 |
450 |
| Dimensions (L x W x H) |
620x625x1390 |
770x678x1675 |
1180 x990x2380 |
1480 x 1230 x 3000 |
| Weight (kg) |
240 |
600 |
1360 |
2000 |
Z L Series Oil-Diffusion Ejector Pumps (Oil Booster Pumps) Evacuation Rate Curves

Z L Series Oil Diffusion Ejector Pumps (Oil Booster Pumps) Connection Dimensions
| Specifications/Model |
ZL-300 |
ZL-400 |
ZL-600 |
ZL-800 |
| H |
1375 |
1651 |
2365 |
2985 |
| h |
695 |
900 |
1290 |
1385 |
| L1 |
620 |
678 |
990 |
1230 |
| L2 |
621 |
690 |
1241 |
1482 |
| L3 |
225 |
345 |
530 |
650 |
| L4 |
300 |
388 |
580 |
730 |
| D1 |
380 |
500 |
710 |
920 |
| D2 |
350 |
465 |
670 |
880 |
| DN |
300 |
400 |
600 |
800 |
| n-∅1 |
8-∅14 |
8-∅18 |
12-∅21 |
20-∅21 |
| d1 |
125 |
170 |
220 |
275 |
| d2 |
105 |
145 |
195 |
250 |
| dn |
65 |
100 |
150 |
200 |
| n-∅2 |
4-∅9 |
4-∅12 |
8-∅12 |
8-∅12 |
Z L Series Oil Diffusion Ejector Pumps (Oil Booster Pumps)