Johnson Electric two-way valve VA7200 Series two-way valve Product Overview: Johnson Electric two-way valve VA7200 Series two-way valve features: 1, selection of cast aluminum frame and APS plastic shell, small size, light weight 2, the choice of a permanent magnet synchronous motor, and with hysteresis clutch mechanism, a reliable self-protection function 3, for a variety of control signals: Incremental (floating point), voltage (0 ~ 10V), current (4 ~ 20mA) 4, with a 0 ~ 10V or 4 ~ 20mA feedback signal (optional) 5 metal gear transmission gear, greatly improving the life of six drives, low-power, output power, low noise 7, the body has a bronze, cast iron, cast steel stainless steel variety of materials to choose from, to suit different working media and temperature requirements 8, the body has two threaded connections and flange connections for easy installation. 9, the system is suitable for new air conditioning system unit winter / summer temperature control. By the temperature sensor TE-1, proportional-integral temperature controller TC-1 and an electric two-way valve consisting of TV-1 supply air temperature control system, TE-1 mounting the detected temperature signal is transmitted to the air duct in TC- 1, TC-1 by continuously comparing the detected value with the set value of the TE-1, while continuing to output signals to control TV TV-1 continuously adjustable degree of opening. And finally to measure the ambient temperature TE-1 is maintained within a set temperature range. When the temperature of the coil is below a certain limit after low temperature protection switch TS-1 to send off the motor power supply, so that the new damper closed to prevent water from freezing inside the coil, the coil split up. VG3000 Series two-way valve specifications and parameters: Nominal 0-1.6MPA housing Brass working medium hot and cold water 50% ethylene glycol vapor Temperature 2-120 ℃ Model Specification DN flow coefficient close off pressure main dimensions LH stroke VG7000 DN25 10 19 1400 110 265 DN32 16 22 800 120 270 DN40 25 22 500 130 275 DN50 40 22 400 145 285