Kaifeng Qingtianweiye Flow Instrument Co.,Ltd. is a high-tech joint-stock enterprise.The company has powerful technical strength and ten professional technicians, our company mainly produce electromagnetic flowmeter series (Flanged,threaded,inserted,high pressure,submerged,sanitary etc),vortex flowmeter (Flanged,inserted,threaded,temperature-press compensation),throtting device flowmeter (standard orifice-plate,standard nozzle,V-cone,annular orifice-plate,venturi tube etc),open channel flowmeter