Direct Answer
For a constant-pressure booster pump RFQ, specify the required flow and pressure together, identify where that pressure must be available, and describe the inlet conditions.
Do not send only a daily water volume or a pump motor rating. Ask the supplier to explain how the proposed pump arrangement meets the stated operating scenarios, including the assumptions used for missing information.
Application Scenarios
For mining camps and remote work sites, describe which users may need water at the same time and whether the project operates continuously or on a defined schedule.
For commercial buildings and industrial facilities, identify the delivery points, elevation information and available distribution-pipework records.
These examples describe information to collect. They do not establish a standard pump configuration for every site.
Selection Factors
Distinguish Daily Volume from Required Flow
Daily water demand describes a total volume over a day. Pump selection also needs information about the rate at which water must be delivered during operation.
Two projects with the same daily volume may have different delivery schedules and simultaneous demands. Provide both the daily requirement, if known, and the expected operating pattern.
If peak demand has not been established, mark it as unconfirmed. Ask the responsible project designer to define the design basis rather than treating an average as the required peak flow.
State Where the Pressure Is Required
“Required pressure” is incomplete without a location.
Identify whether the requirement applies at the booster-package outlet, a building connection or another agreed delivery point. Provide available elevation and pipework information so that the supplier can state what is included in the selection.
Keep pressure units consistent and identify whether the figures are gauge or absolute pressure. Do not assume a pressure value at the package outlet is the same as the pressure available at a downstream user.
Describe the Inlet Conditions
State whether the package receives water from a storage tank, another pumped system or an existing supply connection.
Provide available inlet-pressure information and known variations. If the package draws from a tank, supply the tank arrangement and operating water-level information.
Ask the supplier to identify any inlet assumptions and the conditions that must be confirmed before final selection.
RFQ Input Table
| Input | What to provide | What to ask the supplier |
|---|---|---|
| Water demand | Daily volume, if known, and operating schedule | What demand basis is used in the proposal? |
| Required flow | Confirmed design flow or demand scenarios | Which scenarios does the selection cover? |
| Delivery pressure | Required value, units and exact location | Where is the stated pressure achieved? |
| Inlet conditions | Source arrangement and available pressure or tank-level information | What inlet conditions are assumed? |
| Distribution system | Available elevations, pipework and delivery-point records | Which downstream requirements are included? |
| Operating range | Normal, low-demand and peak-demand conditions, where defined | How does the proposed arrangement serve these conditions? |
| Unconfirmed inputs | Missing information and responsible parties | What must be resolved before final selection? |
This table is an RFQ framework, not a pump-sizing calculation.
Compare Proposals Against the Same Duty
A duty point pairs a flow requirement with a corresponding head requirement. Ask each supplier to identify the proposed duty point and provide the relevant pump performance information.
Do not compare proposals using motor power alone. Check whether suppliers have used the same flow, delivery location, inlet conditions and operating assumptions.
Where suppliers propose different pump quantities or operating arrangements, request an explanation of how each proposal addresses the same project requirements. A difference in configuration should be evaluated against the stated duty, not treated as proof of better performance by itself.
RFQ Checklist
Send:
- Project location and water-supply application.
- Daily water requirement, if available.
- Operating hours and simultaneous-use information.
- Required flow or clearly identified demand scenarios.
- Required delivery pressure, units and location.
- Water-source arrangement and available inlet information.
- Available elevation and distribution-pipework records.
- Normal and peak operating conditions, where established.
- Existing equipment that will remain in service.
- A list of assumptions and inputs still awaiting confirmation.
For the booster package, selection should be customized to the required flow, pressure, inlet conditions and project requirements.
FAQ
Is daily water consumption enough to select a booster pump?
No. Also provide the delivery schedule and required flow or demand scenarios. Daily volume alone does not define the flow needed at a particular time.
Can I request a pump by motor power only?
Motor power alone does not define the required water-delivery duty. Provide flow, pressure location and inlet conditions, and ask for the selection basis.
Should pressure be specified at the pump outlet or the end user?
State the actual project requirement and its location. If both locations matter, list both and ask the supplier to explain the system boundary used in the proposal.
What if some site information is unavailable?
Mark it as pending. Request a preliminary proposal with explicit assumptions and identify which inputs require confirmation before final selection.
Discuss Your Pumping Duty
Send Grace Wang Environmental your required flow, delivery pressure, inlet arrangement and available site information. Request a proposal with a clearly stated selection basis and a list of unresolved inputs.
Related product: Constant Pressure Water Supply System
Related guide: Booster Pump Controls: A Constant-Pressure System RFQ Checklist