Fan coil electric valve installed while using an electromagnetic switch valve air side and water-side control of fan coil units and water-side installation of electric control valve shown in Figure 1. For Figure 1a, c installation concealed fan coil shown at the end of the test the water in front of the fan coil heating in winter work, if before draining off the water to control power or water control valve, since disk negative pressure inside the pipe without water can be drained. For the installation shown in Figure 1b, if the water control valve is closed fan coil type, the water inside the coil can not be drained. In both cases, when the room temperature is below 0 ℃ lead to coil cracking. During the long winter time waterway holidays, for energy conservation, often part of the room is not in use to control the valve is closed, solenoid switch valve and electric control valve installation will cause the room temperature is below 0 ℃, the disk tube cracking. The capital of a high-grade office building fan coil units with a full control as shown in Figure 1b. During the Spring Festival in a building outside area due north off the solenoid coil fan coil cleaning, leading to the room temperature below 0 ℃, the cracking coil, a lot of hot water return pipe from the system into the ceiling, resulting in a larger economic losses. Heating and central air conditioning, air conditioning Shanghai high-quality water to go cheap direct coil; fan coil temperature control switch panel; optional remote control fan coil; fan coil cooling capacity Q, coil heat transfer coefficient K, fan coil face velocity V pipe cooling capacity Q, coil heat transfer coefficient K, face velocity V, the following relationship exists between the static pressure Pj: QαKαVα1 / Pj. Second, of course, the connotation of wind Lα face velocity V, the static pressure and air flow between the two are as follows: First, the relationship between a static pressure fan coil under such limits between 30Pa, static pressure and air flow is proportional to the ! In this case the maximum static pressure of 30Pa for the value of the fan coil can provide an air volume of the air volume corresponding to the largest third gear speed gear, with the gear number decreases the air volume and static pressure also decreases. This is because the same motor by changing the motor output power to achieve the speed control. It should be noted at this time is directly proportional to the amount of fan-coil cooling the relationship between Q and static pressure Pj, that QαKαVαPj. Second, different hydrostatic fan coil limits as 30Pa, 50Pa, an inverse relationship between the static pressure and the amount of wind! This is because at the same motor output power conditions, by switching between the dynamic pressure and the static pressure is achieved, the higher the static pressure corresponds to a smaller amount of wind. About the relationship between this point and the static pressure fan coil cooling capacity Q Pj has analyzed a total pressure above hydrostatic + = dynamic pressure, static pressure on the density of the relevant physical? Dynamic pressure air density = 0.5 * ^ * Winds More than 2 ?? pressure = total pressure - the resistance of each device in the system for analysis of pressure pipe resistance curve must be analyzed according to the fan performance curve and piping. Fan coil cooling capacity, fan coil heating capacity, three rows of pipe fan coil; fan coil air flow pressure; low static pressure fan coil, high static pressure fan coil units, fan coil direction out of the water fan coil cleaning _ Hao Yang _ Shouguang fan coil air conditioning equipment (view) from the Texas Air Conditioning Equipment Co., Ltd. Hao Yang provided. Air Conditioning Equipment Co., Texas Hao Yang (www.dzapjt.com) is a professional, "fan coil units, air, mixed flow fan, FRP fans, dampers, air flow control valve" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Hao Yang" brand has a good reputation. We adhere to the "service first, customers first" principle, so that air-conditioning equipment Hao Yang won the trust of customers all of the fan, ventilation equipment, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you!