Set jockey pump pressure controls as a coordinated sequence derived from the approved system pressure and main fire pump start requirement. The jockey pump normally starts before the main fire pump as pressure falls and stops after restoring normal pressure. The main fire pump start point must remain low enough to avoid nuisance starts yet high enough to meet hydraulic and response requirements. There is no universal set of numbers: suction pressure, elevation, churn pressure, pressure regulation, sensing-line location, and device ratings all matter.
Seguridad y alcance: Las bombas contra incendios y sus motores son equipos de seguridad para la vida. Los trabajos hidráulicos, eléctricos, diésel, de combustible, de baterías, de presión, de equipos rotativos, de prueba y de deficiencias deben seguir el diseño aprobado vigente, las instrucciones del fabricante, las normas aplicables y la autoridad competente. Esta guía explica la ruta de decisiones de ingeniería; no autoriza cambios en campo, derivaciones ni la operación por personal no calificado.
Establish the pressure basis
Use the normal static pressure, source variation, pump curves, elevation, system ratings, and approved hydraulic minimums. Confirm which gauge location defines each setting. Treat this as a system condition rather than an isolated component choice. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Arrange the start sequence
As pressure falls, the jockey pump should receive the first maintenance call. Continued pressure loss from a real demand must then initiate the main fire pump. The most useful evidence is measured or approved project data, not a copied rule of thumb. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Set jockey stop pressure
Choose a stop point the jockey pump can reliably reach without excessive deadheading or exceeding system ratings. Check its shutoff head. Review this condition at normal, test, and credible abnormal states before procurement. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Protect the main pump start point
Do not set it so low that required residual pressure is lost before starting, or so high that normal pressure variation starts the main pump. The design team should turn this point into a traceable calculation or drawing note. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Tabla de decisiones práctica
| Pressure event | Expected response | If incorrect, check |
|---|---|---|
| Small normal pressure loss | Jockey pump starts | Sensing line, controller, start setting |
| Pressure restored | Jockey pump stops | Stop setting, curve, leakage |
| Demand exceeds jockey capacity | Pressure continues to fall | Jockey size and test demand |
| Main start threshold reached | Main fire pump starts | Controller and sensing path |
| Main pump running | System follows approved stop logic | Controller mode and procedure |
| Frequent jockey cycles | Investigate leakage or control issue | Check valves, system volume, settings |
Use a reliable sensing line
Verify connection location, valve position, drainage, blockage risk, trapped air, and independence from pressure surges or an unrepresentative local point. Treat this as a system condition rather than an isolated component choice. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Understand controller behavior
Review automatic start, manual stop or automatic-stop provisions as applicable, timer functions, alarms, and what happens after power restoration. The most useful evidence is measured or approved project data, not a copied rule of thumb. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Diagnose cycling
Trend start and stop pressure, run time, leakage, check-valve condition, pressure tank where used, and gauge calibration before changing settings. Review this condition at normal, test, and credible abnormal states before procurement. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Commission with controlled tests
Lower pressure slowly, record the jockey and main pump actions, verify stop behavior and alarms, then restore the system and secure settings. The design team should turn this point into a traceable calculation or drawing note. Identify the source of every input, the unit used, the operating condition it represents, and the person responsible for approval. If information is preliminary, mark the assumption and test how the decision changes at a conservative boundary. This prevents a neat calculation from hiding an uncertain water level, pressure, valve position, driver condition, or simultaneous demand.
For jockey pump pressure settings, verify this section against the selected pump curve, the actual site arrangement, manufacturer instructions, and the current requirements accepted by the authority having jurisdiction. Check the installed condition as well as the drawing because pipe routes, elevations, supports, controls, and access often change during construction. Record the result in a form that can be repeated during commissioning and later inspection. Do not change a safety-critical setting or isolate fire protection without the approved impairment and restoration process.
Cómo se relaciona esto con el equipo BORRAPUMP
BORRAPUMP suministra equipos de bombeo diseñados para proyectos de agua y protección contra incendios. Revise el correspondiente configuración del producto BORRAPUMP como punto de partida, luego presente el flujo requerido, la carga, la fuente de agua, el motor, la potencia, los controles, las condiciones del sitio, los requisitos aplicables, la cantidad y el destino. La selección final debe utilizar la base hidráulica del proyecto y la presentación aprobada; esta guía no afirma que una disposición de catálogo se adapte a todas las jurisdicciones o riesgos.
Guías relacionadas de BORRAPUMP
- selección de equipo de bombeo contra incendio
- Guía de pruebas de aceptación NFPA 20
- Guía de inspección y pruebas de la NFPA 25
Referencias autorizadas
Las siguientes fuentes establecen el límite normativo, el contexto de seguridad contra incendios y los principios del sistema de bombas utilizados en esta guía. Aplique siempre la edición y la adopción local aceptadas para el proyecto.
- Página de desarrollo de la norma NFPA 25
- Página de desarrollo de la norma NFPA 20
- Recursos sobre sistemas de bombas del Departamento de Energía de EE. UU.
Video educativo
Antecedentes educativos por Practical Engineering: ¿Las bombas crean presión o caudal?. El video respalda el concepto de ingeniería subyacente y no reemplaza los requisitos de protección contra incendios específicos del proyecto.
Preguntas frecuentes
What is the correct jockey pump pressure setting?
Use the project-specific approved sequence; no universal pressure value fits every system.
Should the jockey pump stop automatically?
Follow the listed controller and applicable project requirements. Main and jockey pump stop logic may differ.
Why does the main fire pump start before the jockey pump?
Check sensing lines, controller settings, source pressure changes, and whether the devices measure the same representative system point.
Can I widen the pressure gap to stop cycling?
Only after diagnosing leakage, check valves, system volume, pump curve, and applicable setting limits.
Lista de verificación de verificación final
Antes de la aprobación, confirme la base hidráulica, la condición de la fuente de agua, la curva de la bomba seleccionada, los datos del motor y del controlador, las presiones nominales de los componentes, la disposición de las válvulas, el método de prueba, el acceso, el drenaje, las alarmas y el procedimiento de restauración. Resuelva las diferencias entre los planos y el sistema instalado. Durante la puesta en marcha, utilice instrumentos calibrados y registre la presión de succión, la presión de descarga, el caudal, la velocidad, el estado del motor, las alarmas y las observaciones anormales en cada punto requerido. Guarde los resultados aceptados junto con los registros de la sala de bombas para que las inspecciones posteriores comparen elementos equivalentes.