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Non-negative Pressure Tanks for Water Supply

China Non-negative Pressure Tanks for Water Supply, produced by a professional China manufacturer, VLLRO, are specialized in ensuring stable and efficient water supply. With intelligent non-negative pressure control and durable construction, they resolve pressure instability and flow issues. Supporting multi-specification customization, these factory-manufactured tanks are suitable for various water supply scenarios, ensuring 24/7 reliable operation and hygienic water quality, meeting global procurement standards with strict quality assurance.


These pressure tanks for water supply are core water supply equipment designed and manufactured by VLLRO, a reputable China factory. These Non-negative Pressure Tanks for Water Supply adopt advanced non-negative pressure control technology, which can directly connect to the municipal water supply network without negative pressure impact, ensuring stable water pressure and flow. Made of high-quality materials with a fully sealed structure, they prevent water pollution and guarantee water safety. With simple installation and wide adaptability, they are customized to meet procurement needs of residential, commercial, industrial and public facilities, providing efficient and reliable water supply support backed by strict quality management.


In modern water supply systems, maintaining consistent and stable pressure is paramount. Conventional pressurized systems often struggle with pressure fluctuations, water hammer, and inefficient energy use. This is where advanced buffering and steady-flow solutions make a significant difference. Our Non-negative Pressure Buffer Water Tank is engineered to absorb pressure surges and provide a stable reservoir, preventing pressure from dropping below zero and protecting pump life. For applications demanding a constant, unwavering flow rate, the Non-negative Pressure Steady Flow Water Tank ensures a smooth, pulse-free water output, ideal for sensitive industrial processes or multi-story buildings. For the ultimate in durability and hygiene, our Stainless Steel Non-negative Water Supply Buffer Tank offers superior corrosion resistance and is perfect for potable water systems or corrosive environments. These integrated solutions work seamlessly to eliminate negative pressure, reduce pump cycling, and deliver reliable water supply performance.


The Non-negative Pressure Tanks for Water Supply represent a significant leap in pressurized water supply technology. Its core principle involves utilizing a sophisticated internal air cushion or diaphragm alongside advanced electronic controls to create a seamless interface between the pump, the municipal supply line, and the end-user outlets. This design ensures that the system pressure never falls below atmospheric pressure, thereby preventing contamination from backflow or siphonage. Key operational benefits include a dramatic reduction in water hammer—the destructive pressure spikes caused by sudden valve closures—and a substantial decrease in energy consumption. By minimizing frequent pump starts and stops, the system operates more efficiently, leading to lower electricity costs and extended equipment lifespan. The tank's construction prioritizes longevity and water quality, making it a robust and intelligent choice for modern infrastructure.


Core Technical Specifications

The following parameters define the standard performance and build quality of our Non-negative Pressure Tanks:

  • Working Pressure: 0.6 MPa ~ 1.6 MPa (Customizable)
  • Medium Temperature: 0°C ~ 70°C (For cold water); up to 120°C for specific models
  • Air Cushion Ratio: Typically 1:2 or 1:3, ensuring effective pressure buffering
  • Control System: Integrated PID-based variable frequency drive (VFD) for precise pump speed regulation
  • Protection Class: IP54 or higher for electrical components
  • Noise Level: < 50 dB(A) during normal operation


Product Features

1. Advanced non-negative pressure control technology to avoid impact on municipal water supply networks

2. Integrated pressure and flow monitoring system for real-time adjustment and stability

3. Fully sealed structure to ensure water quality hygiene and prevent secondary pollution

4. Wide adaptability to cope with different water supply pressure and flow requirements

5. Intelligent fault alarm function for timely maintenance and troubleshooting


Product Advantages

1. No need for additional water source pools, saving construction space and reducing investment costs

2. Avoids negative pressure siphon effect, protecting municipal water supply network safety

3. High integration design simplifies system configuration and reduces installation difficulty

4. Stable operation in various working conditions, reducing downtime and maintenance costs

5. Energy-saving design lowers operating costs, achieving long-term economic benefits



Product Model & Dimension Overview

Model Code Effective Volume (L) Diameter (mm) Height (mm) Inlet/Outlet Size Primary Material
NNPT-500 500 800 1800 DN80 Carbon Steel / Stainless Steel 304
NNPT-1000 1000 1000 2200 DN100 Stainless Steel 304 / 316L
NNPT-2000 2000 1400 2500 DN125 Stainless Steel 316L
NNPT-5000 5000 1800 3200 DN150 Carbon Steel (Epoxy Lined) / SS 316L

Our Services

1. Customized Non-negative Pressure Tanks for Water Supply solutions based on client’s water supply scale and network conditions

2. Professional pre-sales project planning and equipment selection consultation to optimize water supply systems

3. Strict factory quality inspection and performance testing for each product before shipment

4. On-site installation guidance and technical training for client’s operation team

5. Long-term after-sales service and spare parts supply to ensure continuous equipment operation


Product Applications

1. Municipal water supply network supporting facilities for residential and commercial areas

2. Industrial parks and economic development zones requiring large-scale stable water supply

3. Remote areas and rural water supply projects needing efficient and reliable water supply equipment

4. Public facilities such as stadiums and exhibition centers with large instantaneous water demand

5. Old community water supply system renovation projects requiring non-negative pressure equipment

Why Choose Us

1. VLLRO is an experienced China manufacturer with in-depth expertise in non-negative pressure water supply technology

2. All Non-negative Pressure Tanks for Water Supply undergo rigorous quality testing to ensure compliance with national and international standards

3. Strong R&D capabilities to continuously upgrade products and adapt to new water supply requirements

4. Factory-direct sales with transparent pricing and reliable delivery, facilitating efficient procurement

5. Perfect after-sales service system to solve client problems in a timely manner, ensuring worry-free use



Key Features & Components

  • Hermetically Sealed Design: Prevents air dissolution into water, maintaining water quality.
  • Food-Grade Bladder/Diaphragm (Optional): For potable water applications, ensuring compliance with health standards.
  • Pressure Transmitters & Sensors: High-accuracy real-time monitoring of system pressure.
  • Automatic Exhaust Valve: Removes trapped air automatically for optimal performance.
  • Fail-Safe Controls: Automatic switch to backup pump or municipal line in case of primary pump failure.
  • Corrosion-Resistant Coating: For carbon steel models, includes internal and external epoxy coating.

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