W*-HY Fire Booster & Pressure Stabilizing Pump Unit

W*-HY Fire Booster & Pressure Stabilizing Pump Unit

W/HY Fire Pressure Boosting & Stabilizing Unit | Automatic pressure maintenance for fire water networks

  • Automatic pressure stabilization: Holds set pressure and reduces main-pump starts.
  • Integrated package: Pump set + tank + valves/instruments + control panel.
  • Fire-duty controls: Auto start/stop with manual override and alarms/interlocks.
  • Reliability design: Duty/standby options with modular, service-friendly layout.
View details Contact us

Product Overview

W(H)Y Fire Pressure Boosting & Stabilizing Equipment is an integrated fire water pressure maintenance system designed for automatic pressure stabilization and standby water supply in fire protection networks.

It maintains constant pipeline pressure, compensates for minor system leakage, and reduces unnecessary starting of the main fire pump.

It is widely used in high-rise buildings, commercial complexes, industrial plants, and municipal fire water supply systems.

✔ Designed for standby pressure maintenance, leakage compensation, and immediate fire response readiness.

Model Designation

W*-HY Fire Booster alt=

Applications

Typical Operating Applications

  • Standby pressure maintenance for automatic sprinkler systems in high-rise buildings
  • Pressure stabilization for fire hydrant and hose reel networks in commercial facilities
  • Leakage compensation in industrial fire protection ring main systems
  • Fire water pressure holding for warehouses and logistics centers
  • Auxiliary pressure maintenance in municipal fire pipeline networks
  • Automatic replenishment for fire water systems in hospitals, schools, and public buildings

Engineering Advantages

Structural Design Logic and Engineering Performance

  • Integrated jockey pump, pressure vessel, control cabinet, and instrumentation provide compact skid-mounted installation.
  • Automatic pressure sensing maintains network pressure within preset operating limits under standby conditions.
  • Pressure compensation reduces frequent starting of the main fire pump, extending equipment service life.
  • Stable standby pressure improves immediate system response during emergency fire demand.
  • Modular configuration simplifies installation, commissioning, and maintenance.
✔ Engineered for pressure stability, standby reliability, and reduced mechanical cycling in fire protection systems.

System Components

W(H)Y Fire Pressure Boosting & Stabilizing Equipment Mainly Consists Of:

  • Jockey pump assembly
  • Pressure vessel
  • Electrical control cabinet
  • Pressure transmitter and pressure switches
  • Check valves and isolation valves
  • Base frame and interconnecting pipework
  • Automatic control and monitoring system

Technical Specifications

Service Conditions

  • Suitable medium: Clean water or fire water without abrasive particles
  • Ambient temperature: 4°C to 40°C
  • Relative humidity: ≤95%
  • Installation altitude: ≤1000 m
  • Indoor or protected outdoor installation

Operating Conditions

  • Flow rate: 1–50 m³/h
  • Head: 20–150 m
  • Power range: 0.75–22 kW
  • Speed: 2900 rpm
  • Liquid temperature: ≤80°C
  • Working pressure: ≤1.6 MPa

Detailed parameter tables are provided below.

Installation & Dimensions

Outline Drawing

W*-HY Fire Booster alt=

Performance Data

No. Name
1 Diaphragm Pressure Tank
2 Pressure Gauge
3 Check Valve
No. Name
4 Rubber Flexible Joint
5 Pump
6 Pump
Pressure Tank Model Φ H A A1 L L1
Φ800 800 2480 800 760 1400 1200
Φ1000 1000 2800 1000 960 1600 1400
Φ1200 1200 3210 1200 1160 1800 1600

Performance Parameters

No. Booster & Pressure-Stabilizing Unit Model Fire Pressure P1 (MPa) Vertical Diaphragm Pressure Tank Matched Pump Operating Weight (kg) Operating Pressure (MPa) Pressure-Stabilizing Volume (L)
Tank Model Working Pressure Ratio Fire Storage Volume (L) Pump Model
Rated Volume Effective Volume
1 ZW(L)-I-X-7 0.1 SQL800*0.6 0.60 300 319 25LG3-10*4 1.5 kW 1452 P1=0.10 Ps1=0.26 P2=0.23 Ps2=0.31 54
2 ZW(L)-I-Z-10 0.16 SQL800*0.6 0.80 150 159 25LG3-10*4 1.5 kW 1428 P1=0.16 Ps1=0.26 P2=0.23 Ps2=0.31 70
3 ZW(L)-I-X-10 0.16 SQL800*0.6 0.60 300 319 25LG3-10*5 1.5 kW 1474 P1=0.16 Ps1=0.36 P2=0.33 Ps2=0.42 52
4 ZW(L)-I-X-13 0.22 SQL1000*0.6 0.76 300 329 25LG3-10*4 1.5 kW 2312 P1=0.22 Ps1=0.35 P2=0.32 Ps2=0.40 97
5 ZW(L)-XZ-10 0.16 SQL1000*0.6 0.65 450 480 25LG3-10*4 1.5 kW 2312 P1=0.16 Ps1=0.33 P2=0.30 Ps2=0.38 86
6 ZW(L)-XZ-13 0.22 SQL1000*0.6 0.67 450 452 25LG3-10*5 1.5 kW 2312 P1=0.22 Ps1=0.41 P2=0.38 Ps2=0.46 80
7 ZW(L)-II-Z- A 0.22-0.38 SQL800*0.6 0.80 150 159 25LG3-10*6 2.2 kW 1452 P1=0.38 Ps1=0.53 P2=0.50 Ps2=0.60 61
8 ZW(L)-II-Z- B 0.38-0.50 SQL800*1.0 0.80 150 159 25LG3-10*8 2.2 kW 1513 P1=0.50 Ps1=0.68 P2=0.65 Ps2=0.75 51
9 ZW(L)-II-Z- C 0.50-0.65 SQL1000*1.6 0.85 150 206 25LG3-10*9 2.2 kW 1653 P1=0.65 Ps1=0.81 P2=0.78 Ps2=0.86 59
10 ZW(L)-II-Z- D 0.65-0.85 SQL1000*1.6 0.85 150 206 25LG3-10*11 3 kW 1701 P1=0.85 Ps1=1.04 P2=1.02 Ps2=1.10 57
11 ZW(L)-II-Z- E 0.85-1.00 SQL1000*1.6 0.85 150 206 25LG3-10*13 4 kW 1709 P1=1.00 Ps1=1.21 P2=1.19 Ps2=1.27 50
No. Booster & Pressure-Stabilizing Unit Model Fire Pressure P1 (MPa) Vertical Diaphragm Pressure Tank Matched Pump Operating Weight (kg) Operating Pressure (MPa) Pressure-Stabilizing Volume (L)
Tank Model Working Pressure Ratio Fire Storage Volume (L) Pump Model
Rated Volume Effective Volume
12 ZW(L)-II-X- A 0.22-0.38 SQL1000*0.6 0.78 300 302 25LG3-10*6 2.2 kW 2344 P1=0.38 Ps1=0.55 P2=0.52 Ps2=0.60 72
13 ZW(L)-II-X- B 0.38-0.50 SQL1000*1.0 0.78 300 302 25LG3-10*8 2.2 kW 2494 P1=0.50 Ps1=0.70 P2=0.67 Ps2=0.75 61
14 ZW(L)-II-X- C 0.50-0.65 SQL1000*1.6 0.78 300 302 25LG3-10*10 3 kW 2689 P1=0.65 Ps1=0.88 P2=0.86 Ps2=0.93 51
15 ZW(L)-II-X- D 0.65-0.85 SQL1000*1.6 0.85 300 355 25LG3-10*13 4 kW 2703 P1=0.85 Ps1=1.05 P2=1.02 Ps2=1.10 82
16 ZW(L)-II-X- E 0.85-1.00 SQL1000*1.6 0.88 300 355 25LG3-10*15 4 kW 2730 P1=1.00 Ps1=1.21 P2=1.19 Ps2=1.26 73
17 ZW(L)-II-XZ- A 0.22-0.38 SQL1200*0.6 0.80 450 474 25LG3-10*6 2.2 kW 3641 P1=0.38 Ps1=0.53 P2=0.50 Ps2=0.58 133
18 ZW(L)-II-XZ- B 0.38-0.50 SQL1200*1.0 0.80 450 474 25LG3-10*8 2.2 kW 3947 P1=0.50 Ps1=0.68 P2=0.65 Ps2=0.73 110
19 ZW(L)-II-XZ- C 0.50-0.65 SQL1200*1.6 0.80 450 474 25LG3-10*10 3 kW 3961 P1=0.65 Ps1=0.87 P2=0.84 Ps2=0.92 90
20 ZW(L)-II-XZ- D 0.65-0.85 SQL1200*1.6 0.80 450 474 25LG3-10*12 4 kW 4124 P1=0.85 Ps1=1.12 P2=1.09 Ps2=1.17 73
21 ZW(L)-II-XZ- E 0.85-1.00 SQL1200*1.6 0.80 450 474 25LG3-10*14 4 kW 4156 P1=1.00 Ps1=1.30 P2=1.27 Ps2=1.35 64
Note:
  • Operating Pressure Symbols in the Table:
  •      P1 — Pre-charge pressure of the pressure tank (required fire pressure) (MPa).
  •      P2 — Fire pump start pressure (MPa).
  •      Ps1 — Booster/jockey pump start pressure (MPa).
  •     Ps2 — Booster/jockey pump stop pressure (MPa).
  • Units No. 1–6 are Type I units, typically installed in a high-level tank room, with the most unfavorable hydrant located below the unit.
  • Units No. 7–21 are Type II units, typically installed in the fire pump room or reservoir room. The fire pressure range and matched pumps listed are provided for selection reference.
  • The pump models listed are those from Chaodun  Pump Factory; however, other pumps with equivalent flow and head may be selected as needed.

How to Select a Pump Model

  • Determine standby replenishment flow according to system leakage volume.
  • Calculate required pressure based on the highest fire terminal elevation.
  • Select pressure vessel capacity according to pipeline volume and allowable cycling frequency.
  • Verify motor power according to duty point and starting frequency.
  • Confirm electrical supply, installation space, and control interface requirements.
✔ Final model selection shall be based on system design pressure, standby flow, and applicable fire protection standards.

Engineering Notes

  • This equipment is intended for standby pressure maintenance only and is not the primary fire pump.
  • The main fire pump shall automatically start when significant pressure drop occurs.
  • Pressure vessel pre-charge shall be set according to pump cut-in pressure.
  • Optional dual power supply and remote monitoring are available for critical systems.
  • Commissioning shall comply with local fire protection regulations.

Compliance & Quality Assurance

  • Hydraulic performance test for each pump unit
  • Pressure vessel hydrostatic pressure test
  • Electrical control cabinet functional verification
  • Pressure switch and transmitter calibration
  • Material traceability for pressure-bearing components
  • Optional third-party inspection and factory acceptance test

Safety Notice

  • Do not operate under dry-running condition.
  • Ensure the suction line is fully primed before startup.
  • Disconnect power before maintenance or inspection.
  • Periodically verify automatic start-stop functionality.

OEM & Customization

This pump series supports engineered configuration and duty-based matching. Technical adjustments can be made according to system requirements and installation conditions.

Available options include:

  • Motor voltage & frequency
  • Pressure vessel capacity and material
  • Mechanical seal type and configuration
  • Control panel communication protocol
  • Surface coating and corrosion protection

Configuration is determined based on duty point and project specifications.

FAQs

Q: Can the system operate under automatic pressure control?
A: Yes, the jockey pump starts and stops automatically based on preset pressure settings.

Q: What is the maximum allowable working pressure?
A: The standard maximum working pressure is 1.6 MPa.

Q: Is VFD control available?
A: Yes, variable frequency control is available upon request.

Q: What liquid can the system handle?
A: Clean water and treated fire water without abrasive solids.

Q: Can the pressure vessel size be customized?
A: Yes, vessel capacity can be selected according to system requirements.

Q: Does the equipment support BMS or SCADA integration?
A: Yes, optional communication modules are available.

Q: Which standards can the equipment comply with?
A: It can be configured according to local fire protection regulations and project specifications.