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A no-negative-pressure water supply equipment is a pressurized water supply unit directly connected to the municipal water network. It boosts water in series, superimposing on the residual pressure of the municipal main, while ensuring the network pressure never drops below the set protection level — so neighboring users are never affected.
Also known as pipe-network superimposed pressure equipment, it eliminates the need for a separate roof tank or ground reservoir, avoids secondary water pollution, and saves 30–50% energy compared with conventional gravity-fed systems.
Denor manufactures both tank type and box type configurations to match different site conditions.
Main benefits of No Negative Pressure Water Supply Equipment
Directly connected to municipal network, no roof tank needed
Boosts on residual pressure, saves 30-50% energy
Protects municipal pipe network from negative pressure
VFD constant pressure control, fully automatic operation
Skid-mounted design, easy installation and commissioning
Duty + standby pumps, uninterrupted water supply
Main applications
High-rise residential buildings
Fire protection water supply systems
Municipal booster stations
Industrial process and cooling water supply
Hotels, hospitals and commercial buildings
Product Description
Technical Data
Applications
| Item | Specification |
|---|---|
| Brand | DENOR |
| Product type | No negative pressure water supply unit (tank type / box type) |
| Power range | 0.75 kW – 630 kW (customizable) |
| Rated voltage | 220V / 380V / 440V, 50/60 Hz (customizable) |
| Number of pumps | 2, 3 or 4 (duty / standby) |
| Max working pressure | ≤ 2.5 MPa |
| Liquid temperature | -15°C to +104°C |
| Ambient temperature | ≤ 40°C |
| Relative humidity | ≤ 95% |
| Medium | Clean water or liquids with similar physical / chemical properties |
| Wetted parts | Cast iron / SS304 / SS316 (optional) |
| Motor | Full copper winding, IE3 efficiency |
| Control | PLC + VFD, touchscreen HMI, optional 4G remote monitoring |
| Certification | ISO 9001, 3C, Utility Model Patents |
Water Supply System
Water conveyance in treatment plants, booster systems for high-rise buildings, and municipal pipeline pressure boosting.
General Industrial Process Boosting
Process water circulation systems, high-pressure cleaning & wash-down applications, and general industrial fluid transfer, fire-fighting system.
Industrial Liquid Transport
Industrial boiler feed water supply, chilled water and cooling water circulation in HVAC systems.
Water Treatment System
Reverse Osmosis (RO) systems, ultrafiltration systems, distillation systems, and swimming pool circulation.
Irrigation and Spraying Systems
Agricultural irrigation, sprinkler irrigation, and drip irrigation systems.
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