... utility and special applications. These control valves exhibit low hysteresis and deadband, good control characteristics, tight shutoff ... body fluid mechanics theory designed according to such low flow resistance in surface flow ,large adjustable scope ... .Working TEM-40~+230(normal TEM.),+230~+45(middle TEM.),+450~+560(high TEM.),-40~-196(low TEM.)Series typeNormal TEM, middle TEM, low TEM, bellows ...