SS304 SS316L Non Negative Constant Pressure Water Supply System Variable Frequency

Non-Negative Pressure Booster Water Supply System For Water Filtration

Product Overview

The Pipe Network Superimposed Water Supply Equipment (Non-Negative Pressure Water Supply System) is an intelligent pressure-boosting device designed to connect directly to the municipal water network. It utilizes the existing pipeline pressure and automatically supplements it when needed, ensuring continuous and stable water supply without generating negative pressure — ideal for water purification and clean water distribution systems.

Working Principle

Pressure sensors continuously monitor both inlet and outlet pressures. The variable frequency controller adjusts the pump speed according to water demand, maintaining constant outlet pressure. When municipal pressure is sufficient, pumps slow down or stop to save energy. When pressure drops, pumps automatically start to compensate, preventing negative pressure and ensuring uninterrupted, safe water supply.

Main Components

• Variable frequency control system (PLC + pressure sensors)

• Multi-stage centrifugal pumps (stainless steel)

• Steady flow tank and check valve assembly

• Negative pressure prevention and air release device

• Stainless steel piping and support frame

• Electrical control cabinet with intelligent monitoring panel

Features

• Non-negative pressure operation: Prevents backflow and secondary contamination.

• Energy-saving: Automatically adjusts pump speed according to demand.

• Intelligent control: Constant pressure and automatic start-stop operation.

• Compact design: Modular skid-mounted structure for easy installation.

• Stable operation: Multi-pump redundancy ensures continuous water supply.

• Hygienic materials: All wetted parts made of food-grade stainless steel 304/316L.

Applications

Ideal for water purification systems, residential water supply, hospitals, schools, office buildings, industrial facilities, and circulating water reuse projects.

Optional Configurations

• Stainless steel 316L piping and pump set

• Remote monitoring (Modbus/RS485 communication)

• Dual power supply automatic switching system

• Auxiliary water tank or negative pressure protection device

• Touchscreen HMI intelligent control interface

• Multi-unit skid-mounted integrated supply system

     Jiangsu Sanhe Environmental Protection Group Co., Ltd., formerly Jiangsu Sanhe Environmental Protection Equipment Co., Ltd., is located on the scenic shores of Lake Taihu. It is a renowned manufacturer and developer of modern environmental protection and water treatment equipment in China. It comprises several subsidiaries, including Jiangsu Sanhe Environmental Engineering Co., Ltd. and Yixing Sanhe Environmental Protection Design Institute Co., Ltd. The parent company has a registered capital of 100.2 million yuan, a building area of ​​over 20,000 square meters, and a staff of 52 technicians. The company boasts not only strong environmental protection equipment production and R&D capabilities, but also a highly qualified team with over 30 years of experience in environmental protection equipment production and service, a passion for environmental protection, and a commitment to integrity.

     After nearly 30 years of continuous effort, our innovative development of new products, technologies, materials, and processes, along with our expertise, has been widely adopted in the industry. We have developed advanced continuous-flow activated carbon filters and differential fully automatic backwash filters specifically for reclaimed water reuse and zero-discharge projects. We have also independently developed high-efficiency activated carbon suitable for flow-through activated carbon towers, resolving challenges in China due to poor adsorption performance, short service life, saturation, and high operating costs, hindering widespread adoption and ensuring long-term effective use of activated carbon.

    ​Since its establishment, Jiangsu Sanhe Environmental Protection Group Co., Ltd. has provided qualified products and services to nearly a thousand renowned domestic and international manufacturers, including municipal sewage treatment plants, the machinery and chemical industry, CNPC, Sinopec, Baosteel Group, Jiangxi Copper Group, Dongfeng Nissan, Dongfeng Motor Corporation, commercial passenger vehicle companies, Hangzhou Luxgen, Great Wall Motors, Dongfeng Peugeot Citroen Automobile, Dongfeng Yangzijiang Bus, CSR Corporation, and the Tarim Oilfield, earning a strong reputation. We are grateful to all our friends who have given us opportunities and helped us grow!

     We firmly believe in down-to-earth and steady development; we advocate scientific innovation and unremitting pursuit; and we promote energy-saving, low-carbon, and green living. We provide our customers with ingenious products and services and strive to establish our company as a leading modern enterprise in China's environmental protection production, research, and development sectors.