No Negative Pressure Water Supply Equipment

High-efficiency No Negative Pressure Intelligent VFD Water Supply Equipment is composed of negative pressure elimination unit, pump sets and control cabinet.Equipped with closed-type flow stabilizer, this tank-style pipe network supercharging device is installed in series on municipal water pipelines with insufficient pressure. Pressure sensors monitor outlet pressure. The system calculates required supplementary pressure, adjusts the number of working pumps and inverter frequency to maintain constant pressure matching water demand.It fully utilizes residual pressure from municipal pipelines without creating negative pressure. Replacing conventional water tanks with flow stabilization tanks avoids secondary pollution. It is a new energy-saving solution for water supply.

Power Range	0.55~300 kW
Power Frequency	35~50 Hz
Water Supply Users	10~10000 households
Pressure Range	0.15~2.5 MPa
Water Supply Flow	≤1500 m³/h
Motor Power	0.75~300 kW
Power Saving Efficiency	20%~60%
Temperature Range	0~40°C

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Product Advantages

Energy Saving

The system maintains constant pipeline pressure by adjusting operating pump quantity and speed according to water consumption, keeping operation at high-efficiency points and saving over 60% energy.
The municipal pipe network retains base pressure; the equipment only provides supplementary pressure, achieving remarkable energy-saving performance.
Stable Water Supply

In case of power failure, the bypass pipeline ensures continuous water supply by automatically switching to municipal tap water pressure.
Pressure sensors detect outlet pressure in real time to adjust pump quantity and inverter frequency for constant pressure output.
Intelligent Control

High-grade intelligent programmable control delivers precise top-tier control reaching advanced international standards.
Fully automatic operation; HMI can be configured on demand to support visualized remote adjustment, monitoring and maintenance.

Detailed Description

Product Overview

No Negative Pressure Water Supply Equipment is composed of non-negative pressure tank, pump units and control cabinet. The equipment effectively utilizes the residual pressure of municipal water pipelines without creating negative pressure on urban pipe networks. It dynamically adjusts the operating quantity and speed of pumps based on real-time water demand to maintain stable outlet pressure. The bypass pipeline design guarantees continuous water supply in case of power outages. With intelligent variable frequency control and prominent energy-saving performance, it is an advanced water supply solution for residential, commercial, agricultural and industrial scenarios.

Performance parameter

No.	Model	Flow (m³/h)	Rated Head (m)	Connection Size (DN)	Motor Power (kW)
1	CDLF2-20	2	15	25	0.37
2	CDLF2-30	2	22	25	0.37
3	CDLF2-40	2	30	25	0.55
4	CDLF2-50	2	37	25	0.55
5	CDLF2-60	2	45	25	0.75
6	CDLF2-70	2	52	25	0.75
7	CDLF2-80	2	60	25	1.1
8	CDLF2-90	2	67	25	1.1
9	CDLF2-100	2	75	25	1.1
10	CDLF2-110	2	82	25	1.1

Structural Characteristics

No Negative Pressure Variable Frequency Water Supply Equipment integrates steady-flow tank, vertical multistage pumps, pressure tank, piping valves and frequency control cabinet. Directly connected to municipal water pipelines, it intelligently adjusts pump operation to utilize residual pipeline pressure, avoiding negative pressure and secondary water pollution with 20%-60% energy saving. A power-failure bypass ensures continuous water supply. Fully automatic and remotely operable, it serves residential, commercial and industrial water supply projects.

Operating Pressure-Temperature Range

This graph shows maximum allowable working pressure versus temperature. Some series keep stable pressure across the whole temperature range, while models 2,3,4 feature reduced pressure limits when the temperature exceeds 40°C. Operating temperature scope: -20℃ ~ 120℃.

Application Scope

FAQs：

1
How does No Negative Pressure Water Supply Equipment prevent negative pressure on municipal pipelines?

Real-time pressure sensors cooperate with the non-negative pressure tank to monitor pipeline inlet pressure continuously. When water consumption exceeds the supply capacity of municipal pipelines, the internal regulating structure balances flow automatically to avoid negative pressure. This design protects municipal pipe networks and meets urban water supply specifications.
2
What energy-saving merits does No Negative Pressure Water Supply Equipment have against traditional tank-type water supply devices?

The equipment makes full use of residual pressure of municipal water pipelines, so pumps only supply supplementary pressure rather than boosting from zero. Intelligent frequency conversion adjusts operating status according to actual water demand, delivering an energy-saving rate of 20%~60%. Removing the water tank also avoids secondary water pollution and regular tank cleaning costs.
3
Does No Negative Pressure Water Supply Equipment stop water supply once power fails?

It will not cut off water completely. The equipment is equipped with a bypass pipeline. When power cuts off, the system switches to the bypass channel automatically. Municipal tap water can directly flow to users to guarantee basic water demand. However, constant pressure regulation function will be unavailable during power outage.

Tags:

Vertical centrifugal pump

No Negative Pressure Water Supply Equipment

No Negative Pressure Water Supply Equipment

Product Advantages

Energy Saving

Stable Water Supply

In case of power failure, the bypass pipeline ensures continuous water supply by automatically switching to municipal tap water pressure. Pressure sensors detect outlet pressure in real time to adjust pump quantity and inverter frequency for constant pressure output.

Intelligent Control

High-grade intelligent programmable control delivers precise top-tier control reaching advanced international standards. Fully automatic operation; HMI can be configured on demand to support visualized remote adjustment, monitoring and maintenance.

FAQs：

In case of power failure, the bypass pipeline ensures continuous water supply by automatically switching to municipal tap water pressure.
Pressure sensors detect outlet pressure in real time to adjust pump quantity and inverter frequency for constant pressure output.

High-grade intelligent programmable control delivers precise top-tier control reaching advanced international standards.
Fully automatic operation; HMI can be configured on demand to support visualized remote adjustment, monitoring and maintenance.