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Welcome to Tianjin ZhuoLiNeng (ZLN) Technology Co., Ltd. – your trusted manufacturer of liquid chlorine dosing equipment for swimming pool water treatment. With over a decade of experience in water treatment automation, we are proud to introduce our Automatic Liquid Chlorine Dosing System, designed to maintain precise free chlorine levels in commercial and residential swimming pools. This equipment integrates advanced PID control and high-precision metering pumps, ensuring stable disinfection while reducing chemical waste and manual labor. Whether you are managing a hotel pool, a public aquatic center, or a private spa, our dosing solution delivers consistent water quality and operational efficiency.
Our system is manufactured in our Tianjin factory with strict quality control, and we export to markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We understand that each pool has unique requirements, which is why we offer customizable flow rates, pressure ranges, and control interfaces. Below, we detail the key features and technical specifications that make our equipment a reliable choice for pool professionals.
Key Features & Technical Specifications
Automatic Control with PID Algorithm: The system continuously monitors residual chlorine levels via a sensor (optional) and adjusts the dosing pump speed to maintain the setpoint. This eliminates over- or under-dosing, saving chemicals and keeping water safe.
High-Precision Metering Pump: Equipped with a durable diaphragm or peristaltic pump head, offering flow rates from 0.5 L/h to 120 L/h with an accuracy of ±1%. The pump can handle liquid chlorine, sodium hypochlorite, and other sanitizers.
User-Friendly Touch Screen Interface: A 4.3-inch or 7-inch digital LCD touch screen displays real-time chlorine levels, pump status, and system alarms. Settings can be adjusted in seconds, with password protection to prevent unauthorized changes.
Wide Range of Materials: The wetted parts are available in PVC, PP, or 316 stainless steel, depending on the chemical compatibility. For aggressive chlorine solutions, we recommend PVC or PP with PTFE seals.
Durable Construction: The enclosure is made of corrosion-resistant ABS or fiberglass, suitable for outdoor or indoor installation. The system is IP65 rated for protection against dust and water jets.
Remote Monitoring & Alarm Functions: Optional RS485 or 4-20mA output allows integration with BMS or SCADA systems. The built-in alarm triggers when the chemical level is low, pump malfunctions, or chlorine concentration deviates from the set range.
Energy Efficiency: The variable frequency drive (VFD) motor adjusts power consumption based on demand, reducing electricity costs by up to 30% compared to fixed-speed pumps.
Easy Installation and Maintenance: The system comes with a pre-assembled panel, including pressure relief valve, check valve, and injection fitting. Quick-release connectors simplify pump head replacement.
| Parameter | Value |
|---|---|
| Flow Rate Range | 0.5 – 120 L/h (customizable) |
| Max Working Pressure | 5 – 10 bar (optional) |
| Control Accuracy | ±1% of full scale |
| Power Supply | 110V/220V AC, 50/60Hz, single-phase |
| Operating Temperature | 0°C – 50°C |
| Ingress Protection | IP65 |
| Communication Interface | RS485 (Modbus RTU) / 4-20mA (optional) |
Benefits for Your Pool Operation
Consistent Water Quality: Automatic dosing keeps free chlorine within the ideal range (1–3 ppm), preventing algae growth and bacteria buildup.
Reduced Chemical Costs: Precise injection eliminates overfeeding, saving up to 20% on chlorine consumption.
Lower Labor Requirements: No need for manual daily testing and adjustment – the system handles it automatically.
Extended Equipment Life: Corrosion-resistant materials and protective features reduce wear on pumps and pipes.
Compliance with Safety Standards: The system meets international guidelines for pool disinfection, helping you pass health inspections.
Scalable Design: Multiple units can be combined for larger pools or multiple pools, with centralized control.
Trusted by Clients Worldwide – As a manufacturer based in Tianjin, China, Tianjin ZLN Technology Co., Ltd. has shipped thousands of dosing systems to over 50 countries, including demanding markets in North America, Europe, and the Middle East. Our team of engineers provides 24/7 technical support and free online training for installation and maintenance. We offer a 2-year warranty on the main unit and a lifetime supply of spare parts at competitive prices. With a 98% customer satisfaction rate and a dedication to continuous improvement, we are confident that our automatic liquid chlorine dosing equipment will exceed your expectations.
Don’t settle for unreliable manual dosing. Contact us today for a quote or a free consultation. We are ready to customize the system to your specific pool volume, chemical type, and budget. Let Tianjin ZLN Technology be your partner in clean, safe, and efficient swimming pool water treatment.
Frequently Asked Questions
Q: What chemicals can this dosing equipment handle?
A: It is designed for liquid chlorine (sodium hypochlorite) and other compatible sanitizers. For other chemicals, please consult our sales team to confirm material compatibility.Q: Do I need a separate chlorine sensor to use the automatic control?
A: The system can be used with or without a sensor. In automatic mode, a sensor (optional) provides feedback; in manual mode, you set the dosing rate manually. We recommend using a sensor for optimal performance.Q: What is the typical lifespan of the dosing pump?
A: With proper maintenance, the pump head can last 2–3 years, and the motor can last 5–8 years. We provide replacement parts and technical support.Q: Can this equipment be used for outdoor installation?
A: Yes, the IP65-rated enclosure protects it from rain, dust, and splashes. However, extreme temperatures below 0°C or above 50°C may require additional insulation or a climate-controlled box.Q: How do I set the desired chlorine level?
A: Simply input the target ppm value on the touch screen. The PID controller will automatically adjust the pump speed to maintain that level.Q: Is remote monitoring available?
A: Yes, we offer optional RS485 (Modbus) or 4-20mA output for integration with your building management system. Remote monitoring via cloud is also available upon request.Q: What is the lead time for an order?
A: Standard models are shipped within 7–15 working days after payment. Customized orders may take 20–30 days, depending on complexity.Q: Do you provide installation instructions?
A: Yes, each unit comes with a detailed manual, and we offer free online video guidance. On-site installation supervision is available for large orders.
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