Shanghai Songjiang Group’s official website introduces information on rubber expansion joints for fully automatic steam and water heating units in heat exchange stations. Songjiang Group provides high-quality rubber expansion joints for numerous heat exchange stations, made with high-temperature resistant rubber with a 50% rubber content and supporting testing, with a 3-year warranty.
Frequent maintenance and replacement are costly. Three years maintenance-free and three years without replacement are the most cost-effective solutions.
Water Supply Pump Control System: Equipped with variable frequency constant pressure water supply function, with a simple human-machine operation interface, easy and clear operation. The artificial intelligence fuzzy control algorithm requires few user-set parameters, ensuring stable pressure control. It has automatic control of dynamic and static water supply pressures, allowing the setting of two water supply pressures for dynamic and static pressures. It automatically switches to water replenishment and water shortage protection functions when the circulating pump starts and stops. When the water supply tank is short of water, the pump stops automatically to prevent dry running, and the automatic pressure relief valve opens to release pressure when the system expands and exceeds pressure.
Circulating Pump Control System: The circulating pump uses pressure control to adjust the speed of the circulating pump automatically based on the secondary network supply and return water pressure difference or supply water pressure, ensuring stable outlet pressure or supply and return water pressure difference. Due to the use of variable frequency control technology, the starting and stopping of high-power circulating pumps are controlled by frequency converters, eliminating surge impacts on the power grid and pressure impacts on the heating pipe network, greatly reducing the damage rate of pipes and valves, and significantly reducing the requirements for the capacity of the electrical transformer for the heat exchange station, saving investment and maintenance costs.
Primary Network Flow Regulation Control System: Automatically controls the opening of the primary network flow regulating valve based on the outlet temperature of the secondary network to ensure a stable outlet temperature of the secondary network. It has an outdoor temperature compensation control function, automatically adjusting the outlet temperature of the secondary network according to the outdoor temperature change. The higher the outdoor temperature, the lower the outlet temperature of the secondary network; the lower the outdoor temperature, the higher the outlet temperature of the secondary network. It can manually adjust the opening of the flow regulating valve on the computer controller. It supports time-of-day control, enabling energy-saving mode settings through the human-machine interface.
Remote Data Communication Function: The control system can be equipped with an RS485 remote data communication interface, allowing up to 64 heat exchange units to be connected on the same line to a computer. Each station is distinguished by a different station number, making it convenient to exchange data with the upper computer. With an upper computer equipped, it can remotely monitor the operating parameters of the heat exchange units and automatically record data according to set time, allowing historical operating data of the units to be queried and printed on the computer at any time, and historical temperature and pressure to be plotted and printed on the computer for analysis and understanding of the operating status of the units and analysis and resolution of faults.
Temperature Sensor Short Circuit and Open Circuit Chinese Display Prompt Function: It has a pressure sensor disconnection system protection function, automatically detecting the status of the pressure sensor disconnection to prevent the system from causing damage to the pipe network and user heating equipment.
Automatic Fault Diagnosis: Water supply pump overpressure protection: when the system exceeds the set pressure, the water supply pump automatically stops/pumping stops, and the water supply pump automatically switches to the standby pump after a failure to ensure the normal operation of the system. Water tank water shortage alarm: when the water tank is short of water, the water supply pump stops automatically, and resumes operation automatically after returning to normal. Overtemperature alarm: when the system exceeds the set temperature, the regulating valve closes automatically to ensure the normal temperature of the system.
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