ZJ Series Roots Booster Vacuum Pumps
ZJ Roots (booster) vacuum pumps, nominal 70–5000 L/s (252–18,000 m³/h), DN80–DN400 inlets. A Roots booster runs in series ahead of a liquid ring or rotary piston pump: the backing pump handles the discharge while the booster raises the attainable vacuum and the pumping speed at low pressure. Supplied loose or as a packaged set with the backing pump. Model number is the nominal speed in L/s.
Model specifications
9 unique models · 9 configurations. Open a model to compare its available configurations.
ZJ12Capacity—Motor range—Quote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ12 | — | — | — | — |
ZJ27Capacity—Motor range—Quote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ27 | — | — | — | — |
ZJ70Capacity252 m³/hMotor range1.5 kWQuote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ70 | 252 | 1.5 | 80 mm | — |
ZJ200Capacity720 m³/hMotor range3 kWQuote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ200 | 720 | 3 | 100 mm | 210 |
ZJ300Capacity1,080 m³/hMotor range4 kWQuote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ300 | 1,080 | 4 | 150 mm | 290 |
ZJ600Capacity2,160 m³/hMotor range7.5 kWQuote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ600 | 2,160 | 7.5 | 200 mm | 560 |
ZJ1200Capacity4,320 m³/hMotor range11 kWQuote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ1200 | 4,320 | 11 | 250 mm | 850 |
ZJ2500Capacity9,000 m³/hMotor range22 kWQuote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ2500 | 9,000 | 22 | 320 mm | 1,500 |
ZJ5000Capacity18,000 m³/hMotor range37 kWQuote this model →
| Model | Capacity (m³/h) | Motor (kW) | Port | Weight (kg) |
|---|---|---|---|---|
| ZJ5000 | 18,000 | 37 | 400 mm | 3,450 |
How we verify a bolt-on replacement
The quotation follows a drawing-led check before you place an order.
Send the original model
Share the nameplate model and your required duty.
We check the interface
We verify flange size and orientation, foundation bolt pattern and shaft height, then send the equivalent model and outline drawing.
You confirm before quotation
You review the drawing; after confirmation, we prepare the quotation.
What you get with the quotation
Tell us the duty point (capacity, suction pressure, seal-liquid temperature) and we return, normally within one working day:
- Performance curve — capacity against suction pressure at your seal-liquid temperature — not a catalogue figure
- Dimensional outline drawing — flanges, bolt pattern, shaft height, so you can check the fit before ordering
- Material specification — wetted-part materials for your gas and liquid, with certificates on delivery
- Utility figures — seal-liquid flow and motor rating, for sizing the supply and the starter
If the drawing does not match your original, we say so and do not quote.
Confirm the drawing before you order
Send the original model and duty. We will return the equivalent selection, outline drawing and performance curve with the quotation.