Straightening Vanes

Swirl is a condition where the gas velocity is not totally parallel to the axis of the pipe but has a spiral component . It may be caused by complex piping, control and/or shutoff valves, elbows or other fittings in the meter/regulator station. Swirl in the direction of the rotor rotation will cause aturbine meter to over-register and vice-versa for swirl in the opposite direction of the rotor. Elster American Meter Straightening Vanes straighten the gas flow to a normal pattern, enabling accurate measurement by the downstream turbine meter. Elster American Meter Straightening Vanes are fabricated from carbon steel in a variety of sizes for installation in either schedule 40 and schedule 80 pipe. They are produced in accordance with AGA and ASME recommendations.