When a fire starts, the water system must deliver the required flow and pressure within seconds, every time. That is why fire-fighting pumps are specified differently from ordinary water pumps.
The parts of a fire pump set
- Main fire pump. Electric or diesel driven, sized for the full design flow and pressure of the sprinkler or hydrant system.
- Jockey pump. A small pump that keeps the system pressurised and covers minor leaks, so the main pump does not start for a dripping valve.
- Controller. Starts the pumps automatically when the pressure falls, and is designed for emergency duty.
- Standby pump. Many projects add a diesel or second electric pump so that a single failure cannot leave the building unprotected.
Which standard applies?
Projects are normally designed to a fire standard such as NFPA 20, UL/FM or the local code. The standard decides the pump curve shape (for example the required head at 150% of rated flow), the controller type and the testing arrangement. Always tell your supplier which standard you must meet, because it changes the pump selection, not just the paperwork.
What to send for a quotation
- Design flow (m³/h or l/s) and required pressure
- Applicable standard and approvals needed
- Electric, diesel or both, and the power supply
- Number of pumps and whether a standby is required
- Water source: tank level, suction conditions, site altitude
Selection and documents
Our engineers check the duty point, the shut-off head and the 150% flow point against the pump curve, and supply a datasheet and performance curve for approval. Compliance details are confirmed in writing with the quotation.
Planning a fire-protection project? Contact our team with your flow, pressure and standard and we will propose a suitable pump set.
Comments
No comments yet. Be the first to write one.