Application of Siemens Electric Valve in Temperature Control of Intelligent Heat Exchanger

Siemens Building Technologies is the global leader in building management, HVAC control, security and fire protection systems. Siemens Building HVAC HVAC products in intelligent heat exchanger temperature control has a large number of applications. - Siemens electric thermostatic valve system assembled from imported products, according to the backwater temperature or duct temperature automatically adjust the water temperature, or adjust the water flow, with the heat exchanger or heat exchanger combination can be made of intelligent Thermal units or smart heat exchangers, the products mainly have the following advantages: 1, Siemens valve controller installation and commissioning is simple, does not require expensive commissioning and on-site programming costs. 2, the controller automatically according to the secondary side of the water temperature, adjust the water flow within the primary valve to achieve comfort, energy saving effect. The outlet temperature of the heat exchanger compensates and varies according to the outdoor temperature. The user feels comfortable during use, avoiding the higher outdoor temperature and the higher the indoor temperature, and the lower the outdoor temperature is, the lower the indoor temperature is. Users in the use of comfortable premise, can save operating costs, reduce operating costs and achieve considerable economic benefits. 3. Depending on the use of the scene, especially unattended workstations, multi-function controller can be used to extend the selection of features to support the pump, flow, pressure and other control, and the operation of the fault alarm. 4. The valve body adopts advanced pressure feedback device, which solves the problem that long plagued the electric control valve due to high pressure drop. Wide range of uses, can be used for chemical, petroleum, metallurgy, electric power and light industry production and automatic control, suitable for air conditioning, refrigeration, ventilation, heating and other heat exchange occasions. 5, electric valve actuator using Siemens Building Technologies hydraulic control patented technology to achieve high thrust, long life, safety and stability, which can effectively save user investment. 6, Add outdoor temperature sensor, realize outdoor temperature compensation, and save energy and reduce operating costs. Second, the main features: 1, Siemens electric temperature control system All components are imported Siemens original products, separate delivery, easy to transport and maintain. 2, electric temperature control valve can accept all kinds of control system output intermittent and continuous control signal, easy system integration. 3, the electric valve body structure using balanced structure, the same output power in the case of electric actuators, it is more applicable than the single-seat direct valve to allow a wider range of pressure. Small size, light weight, easy installation. 4, when the valve is closed or open to the maximum limit switch to cut off the power to protect the motor. 5. Electric actuator using permanent magnet synchronous motor, fast response, output power, low power consumption, low noise. Third, the structure of the composition: Electric temperature control valve structure is divided into two-way valve and three-way valve. By the electric valve and valve actuators, controllers and sensors. 1, electric valve body and actuator Siemens valve specifications and parameters Electric ratio control valve diameter: DN15-DN150 valve interface for the thread or flange, pressure PN10 to PN40, the medium temperature range from up to 350 degrees. 2, temperature controller RWD62 or RWD68 controller, can receive a variety of sensor signals, such as 0-10V, PT100, Ni1000 and so on. The output signal is DC0-10V or digital signal. 3, commonly used sensors Immersion water temperature sensor QAE2120.010 (QAE22A) Use: -30-130 ℃, sensitive components: Ni1000 Connection: 2-wire immersion casing material: stainless steel immersion casing length: 100mm thread connection G1 / 2 "Outdoor temperature sensor QAC22 Operating temperature range: -35-50, Ni1000, 2-wire connection <Select when using the outdoor temperature compensation function>