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.
Segurança e âmbito: As bombas de incêndio e respetivos acionadores são equipamento de segurança de vida. Os trabalhos hidráulicos, elétricos, a diesel, de combustível, de bateria, de pressão, de equipamento rotativo, de ensaio e de anomalias devem seguir o projeto aprovado em vigor, as instruções do fabricante, as normas aplicáveis e a autoridade com jurisdição. Este guia explica o caminho de decisão de engenharia; não autoriza alterações em campo, desvios ou a operação por pessoal não qualificado.
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.
Tabela de decisão prática
| 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.
Como isto se relaciona com o equipamento BORRAPUMP
A BORRAPUMP fornece equipamento de bombagem concebido por engenharia para projetos de água e proteção contra incêndios. Reveja o relevante Configuração do produto BORRAPUMP como ponto de partida, submeta seguidamente o caudal, a altura manométria, a fonte de água, o acionador, a potência, os controlos, as condições do local, os requisitos aplicáveis, a quantidade e o destino. A seleção final deve utilizar a base hidráulica do projeto e a submissão aprovada; este guia não afirma que uma disposição de catálogo se adapta a todas as jurisdições ou riscos.
Guias BORRAPUMP relacionados
- seleção do grupo gerador de incêndio
- guia de testes de aceitação da NFPA 20
- Guia de inspeção e ensaio da NFPA 25
Referências fidedignas
As fontes seguintes estabelecem os limites normativos, o contexto de segurança contra incêndios e os princípios dos sistemas de bombagem utilizados neste guia. Aplique sempre a edição e a adoção local aceites para o projeto.
- página de desenvolvimento da norma NFPA 25
- Página de desenvolvimento da norma NFPA 20
- Recursos de sistemas de bombagem do Departamento de Energia dos EUA
Vídeo educativo
Formação académica por Practical Engineering: As bombas criam pressão ou caudal?. O vídeo apoia o conceito de engenharia subjacente e não substitui os requisitos de proteção contra incêndio específicos do projeto.
Perguntas frequentes
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 verificação de verificação final
Antes da aprovação, confirme a base hidráulica, a condição da captação de água, a curva da bomba selecionada, os dados do acionador e do controlador, as pressões nominais dos componentes, o arranjo das válvulas, o método de ensaio, o acesso, a drenagem, os alarmes e o procedimento de restabelecimento. Resolva as divergências entre os desenhos e o sistema instalado. Durante a comissão, utilize instrumentos calibrados e registe a pressão de aspiração, a pressão de descarga, o caudal, a velocidade, a condição do acionador, os alarmes e as observações anómalas em cada ponto necessário. Mantenha os resultados aceites junto dos registos da casa de bombas para que inspeções posteriores comparem dados equivalentes.