... DC or 5V DC) and single-phase power to control the pressure, flow, temperature, and liquid level.This valve is widely ... applied in power, gas, industry chemical, metallurgy, environment protection, light industry, teaching and ... Material: HT200, ZG230-450, ZG1Gr18Ni9Ti, ZG0Cr18Ni12M02Ti6) Normal temperature: -20~+200 Deg.C7) Heat elimination: -40~+450 ...