THE BELLOW ACTUATED FLOW METER

The bellow actuated flow meter of consist of the constant high pressure and,low pressure chamber that are seperated with liquids and they are classified as filled below assembly.The left hand assembly consist of calibrated range assembly whose function in conjunction with bellows movement is used to measure pressure drop across primary elements. A connecting rod is connected to the left hand of pressure bellow and extend over to the right side of high pressure bellow, at which point there is an interval called spring. This connecting rod has the upper end of the triangular shaped torque arm attached to it by a cable assembly which is always in tension. The lower end of the torque arm is connected to a torque tube.Any horizontal movement of the connecting rod is therefore converted to a rotary motion of the torque. This motion is brought from the meter body unto the instrument case as a shaft rotation and used to actuate the pen linkage. The angular rotation is approximately 8o between the flow and maximum flow,Most bellow flowmeters meters are of the same general design The bellows are hydraulically formed: those of other make are of a welded construction. The internal parts of all are available, including the bellow made of type 316 stainless steel to provide maximum resistance to corrosion..There are various types of liquid filled  that are used by a different manufacturer which covers the operating temperature  - 5717 to 232 oC The manufacturer should be consulted as regards the special available oxygen intake measurement and includes lower and higher temperature of the secondary elements and the two complete systems.
A wide range of spring is available for measuring the pressure drop across the primary element for flow measurement . In addition, to terms of meters per minutes per second are used for measuring pressure drop across process vessels. bellow activated flow meters are also available for operating pressure up to  a maximum of 5000 psig. It is imperative therefore to operate the instrumentation of the machines to form operating element of the designs.