QIG / INLINE
A pump within the pipeline
A compact vertical pump-and-motor arrangement for water boosting and circulation. Start here when the inline installation is central to the equipment layout.
Water Booster Pumps
Pump options for building and industrial pressure boosting.
Compare QIG in-line and QDL/QDLS multistage water booster pumps for building water supply and industrial boosting. Select against the inlet pressure, required delivery pressure and changes in demand.
Which booster arrangement fits your installation?
Compare the installation and pressure duty first. Then review the relevant series against the same flow and inlet conditions.
QDL / QDLS / MULTISTAGE
A vertical multistage arrangement
A stacked-stage assembly for clean-water boosting and treatment duties. Review the required pressure increase and the available, primed inlet supply.
Compare pumps for pressure boosting
Compare QIG in-line and QDL/QDLS vertical multistage arrangements. Keep the available inlet pressure, required outlet pressure and flow range together.
QIG
QIG Vertical In-Line Pump
QIG combines the pump and motor in a compact vertical in-line arrangement. It is used for pipeline boosting, circulation and building-water systems.
- building water supply
- pipeline boosting
- HVAC
QDL/QDLS
QDL/QDLS Vertical Multistage Pump
QDL/QDLS is a non-self-priming vertical multistage pump for boosting and water treatment. Its stacked arrangement provides a different installation layout from a horizontal multistage pump.
- building water supply
- industrial boosting
- water treatment
Compare the two booster pump arrangements
Use this guide to compare the arrangement and information required for selection. Confirm the actual model curve and operating limits for your duty.
Swipe across the table to compare all columns.
| Installation & duty | QIG vertical inline | QDL / QDLS vertical multistage |
|---|---|---|
| Construction | Vertical inline pump with compact pump-and-motor connection. | Vertical multistage assembly with stacked pump stages. |
| Application direction | Pipeline boosting, building water and water circulation. | Clean-water boosting, water treatment and irrigation. |
| Installation review | Pipe connections, support, installation envelope and motor access. | Vertical clearance, pipe support, inlet supply and service access. |
| Liquid review | Check liquid, temperature and material compatibility for the proposed QIG model. | Non-self-priming; check liquid cleanliness, temperature and material compatibility. |
| Hydraulic selection | Match required flow and pressure increase to the model curve. | Match required flow and pressure increase to the model curve and stage arrangement. |
| System configuration | Define controls, standby, valves and instruments separately. | Define controls, standby, valves and instruments separately. |
What the arrangement means on site
A suitable curve still needs a practical installation. Bring the pump, piping and motor access into the same layout review.
01
Pipeline fit
QIG uses a vertical inline arrangement. Compare the proposed connection dimensions and support requirements with the existing pipe route before selecting a replacement.
02
Vertical clearance
QDL / QDLS uses stacked stages below the motor. Check the complete assembly height and the space needed for installation, inspection and removal.
03
Inlet supply
Record the minimum available inlet condition as well as the normal condition. Confirm filling, venting and start-up requirements for the selected pump.
Applications for booster pumps
Building water supply
For distribution where elevation and simultaneous users create a pressure requirement. Review the critical outlet and available inlet pressure.
Process and service water
For production users with steady, batch or intermittent demand. Define which users operate together and how pressure is controlled.
Water treatment and distribution
For clean-water transfer through a treatment or delivery route. Keep the liquid condition, line losses and required pressure in the selection.
Pressure before and after the pump
The required pressure increase depends on the incoming supply. Minimum inlet pressure and changing water demand are as useful as the target delivery pressure.
- Minimum and normal inlet pressure
- Required outlet pressure
- Normal and peak flow
- Water temperature and quality
- Control, standby and power requirements
Define the equipment you need included
Decide whether the enquiry concerns a pump, a pump-and-motor assembly or a wider booster package. The quotation defines the actual supplied equipment.
01
Pump and drive
Selected series and model, motor supply, connections, mounting and required curve or drawing. Include the nameplate and dimensions when replacing existing equipment.
02
Package and control
Required pump quantity, duty/standby strategy, control mode, pressure sensing, valves, instruments and pipework. Identify site-supplied items and control interfaces.
Technical documents
Industrial pump brochure
The industrial pump brochure introduces QIG and QDL / QDLS. For a final selection, request the applicable model curve, arrangement drawing and operating instructions with your duty.
Booster Pumps questions
How do in-line and multistage water booster pumps differ?
QIG uses a compact vertical inline arrangement. QDL / QDLS uses a vertical multistage assembly. Compare installation, liquid and inlet conditions, then match the required operating point to the applicable model curve.
Are QDL / QDLS pumps self-priming?
No. They are non-self-priming pumps. Confirm the inlet supply and the filling, venting and start-up procedure for the actual installation.
Can I choose from outlet pressure alone?
Include the available inlet pressure, required flow range and delivery conditions. The pump must provide the required pressure increase at the operating flow.
Are controls and standby pumps included?
The pump family does not define a complete package. Specify the required controls, pump quantity, standby duty and ancillary equipment so the quotation can identify the supply scope.
What is needed for a replacement booster pump?
Send the nameplate, existing arrangement photographs, connection and mounting dimensions, motor supply and operating duty. Keep the original control strategy and any changed water demand in the review.
Related pump families
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- Application and liquid
- Pump, drive and installation
- Curves, drawings and document scope