Siemens original electric thermostatic valve - Jinan Lihua Dakota

I. Introduction electric thermostatic valve electric control valve for special applications in the field of temperature control. Electric thermostatic valve regulating valve consists of the original German SIEMENS controllers, actuators, sensors and flow, it can also be configured explosion of domestic self-balancing valve according to user requirements. Controller with PI, PID adjustment function, precise control, multi-loop control, versatile, can extend the functionality according to different requirements. Actuator is a mechanical and electro-hydraulic, adjust the sensitivity, the shutdown force, adjustable flow characteristics (linear or equal percentage), and with power protection. Body of flow control valve, linear, adjustable ratio, sealed tight, high temperature resistant, anti-cavitation. Flexible controller function combination is also available fluid flow, pressure, pressure, temperature, enthalpy and air quality control. Circulatory system for supply and return water main pipe pressure bypass automatic control, is another typical application of the electric control valve. Second, applications 1, the heating system heat exchanger or heat exchanger unit 2, 3 domestic hot water systems, air conditioning, water / air system 4, the production of process heat temperature control Third, the product advantages 1, different site conditions, the flexibility adjust the control parameters to optimize the system. 2, through calculus, temperature trends predict in advance, accurate temperature control. 3, by the controller reads the current temperature value and observe the valve working condition. 4, scalable features such as temperature compensation, remote setting, day and night, summer and winter conversion, maximum priority, cascade control, over-temperature alarm, remote communications, central monitoring, energy saving, safe. 5, the user can choose according to the requirements of circuit protection function, the valve automatically when the power is turned off. 6, to achieve a variety of intelligent energy-saving operation mode, unattended, cost-effective. Fourth, the selection of a common sense Siemens thermostatic valve, should be based on the type of heat medium (steam / hot water), temperature and pressure parameters and use conditions (heat exchanger type, on / off system) considering the selection of valve materials, distribution ability and actuator switch-off force. 2, when used in steam flow control, generally refers to a saturated steam 98% dryness. If superheated steam, due to changes in fluid viscosity coefficient and adiabatic index k steam flow occurs that causes a corresponding change in general need to recalculate the check. 3, before and after the media flow and pressure valves square root relationship. Excessive pressure not only noise, but also cavitation effects on the body, affecting the life, the light Mifengbuyan weight may explode, causing heavy casualties and other accidents. 4, excellent temperature adjustment curve to achieve the effect of temperature assurance. In addition to the fast heat of the system to special requirements, we should try to ensure that a percentage or parabolic characteristics of the valve is like. Equal percentage: Q / Qmax = R (L / Lmax-1) parabolic type: Q / Qmax = 1 / [1+ (root under R-1) L / Lmax] 2 5, electric thermostatic valve do not long off valve. Shutdown, turn off 6, two-way valve by removing the valve seat must not be used as a three-way valve blind plate. 7, using third-party production of equipment with Siemens product support, should pay attention to meet the safety requirements. 8, the thermostatic valve is not available with straight water supply system, to be added cycle, if it is that the heat exchanger is needed to increase thermal storage tank. 9, when the domestic hot water condition, please distinguish between 24-hour hot water supply conditions and timing.