1. introduction
　　Rotor steam Flowmeter is made by throttle body, damper and indicator. Depend on principle of shunt; it’s a kind of differential pressure instrument. When the measured steam of medium get into throttle body, a part through the main pipe of the throttle orifice, the other through the shunt to Jet nozzle so that can Jet to the impeller, the impeller torque, rotating impeller drive wheel axis, at the bottom of the wheel shaft is equipped with damping blades, installed in a room filled with damping liquid， constrained to rotate the impeller, so it's speed is larger than that of steam injection speed. As a result, the impeller can effectively absorb the steam injection speed function, to make it rotation speed and steam jet torque and damping torque corresponding to the relationship and form a certain amount, the impeller speed is proportional to the flow.
　　The rotor steam Flowmeter is a mass Flowmeter that can display the spot and remote cumulative or momentary value. The intelligent type is the compensation for temperature and pressure, can measure the superheated steam. Meter equipped with Ⅰ, Ⅱ, Ⅲ throttling orifice plate, can be change by changing the throttling orifice plate flow range, the meter have widely measuring range, high precision, long service life, convenient operation and maintenance, is widely used in petroleum, chemical industry, light industry and other industrial departments of steam flow measurement.

2. Characteristics

　　2.1 Flowmeter is belong to mechanical type instrument, it has sound construction, easy to install, operate and maintenance.

　　2.2 equipped with 3 kind of orifice, widely flow range.

　　2.3 It can easily adjust pressure when the working pressure changed.

　　2.4 magnetic connections, with good sealed performance.
3. Measurement range