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.
Keamanan dan cakupan: Pompa pemadam kebakaran dan penggeraknya adalah peralatan keselamatan jiwa. Pekerjaan hidrolik, kelistrikan, diesel, bahan bakar, baterai, tekanan, peralatan berputar, pengujian, dan gangguan harus mengikuti desain disetujui saat ini, instruksi pabrikan, standar yang berlaku, dan otoritas yang memiliki yurisdiksi. Panduan ini menjelaskan jalur keputusan teknik; panduan ini tidak mengizinkan perubahan lapangan, pengoperasian bypass, atau pengoperasian oleh personel yang не berkualifikasi.
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.
Tabel keputusan praktis
| 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.
Bagaimana ini terkait dengan peralatan BORRAPUMP
BORRAPUMP memasok peralatan pompa rekayasa untuk proyek-proyek air dan proteksi kebakaran. Tinjau yang relevan Konfigurasi produk BORRAPUMP sebagai titik awal, lalu serahkan aliran, tinggi tekan, sumber air, penggerak, daya, kontrol, kondisi lokasi, persyaratan yang berlaku, jumlah, dan tujuan yang diperlukan. Pemilihan akhir harus menggunakan dasar hidrolik proyek dan submittal yang disetujui; panduan ini tidak mengklaim bahwa satu susunan katalog cocok untuk setiap yurisdiksi atau risiko.
Panduan BORRAPUMP terkait
- pemilihan paket pompa pemadam kebakaran
- Panduan pengujian penerimaan NFPA 20
- Panduan inspeksi dan pengujian NFPA 25
Referensi otoritatif
Sumber-sumber berikut menetapkan batas standar, konteks keselamatan kebakaran, dan prinsip sistem pompa yang digunakan dalam panduan ini. Selalu terapkan edisi dan adopsi lokal yang disetujui untuk proyek tersebut.
- Halaman pengembangan standar NFPA 25
- Halaman pengembangan standar NFPA 20
- Sumber daya sistem pompa Departemen Energi AS
Video edukasi
Latar belakang pendidikan oleh Practical Engineering: Apakah Pompa Menghasilkan Tekanan atau Aliran?. Video tersebut mendukung konsep teknik yang mendasar dan tidak menggantikan persyaratan perlindungan kebakaran khusus proyek.
Pertanyaan yang sering diajukan
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.
Daftar periksa verifikasi akhir
Sebelum persetujuan, konfirmasikan basis hidrolik, kondisi sumber air, kurva pompa yang dipilih, data penggerak dan pengontrol, peringkat tekanan komponen, susunan katup, metode pengujian, akses, drainase, alarm, dan prosedur pemulihan. Selesaikan perbedaan antara gambar kerja dan sistem yang terpasang. Selama pengujian (commissioning), gunakan instrumen yang dikalibrasi dan catat tekanan isap, tekanan buang, aliran, kecepatan, kondisi penggerak, alarm, dan pengamatan tidak normal pada setiap titik yang diperlukan. Simpan hasil yang diterima bersama catatan ruang pompa sehingga pemeriksaan selanjutnya dapat membandingkan hal yang setara.