Abstract: An elongated body is provided including opposite side portions removably secured together by transverse threaded fasteners. One set of corresponding ends of the side portions include relieved areas opening toward each other defining a cavity opening outwardly of the corresponding end of the body and along one longitudinal edge thereof. A protractor arm is pivotally mounted within the notch for movement between a retracted position received within the cavity and extending along the one edge and an extended position disposed at substantially 90.degree. relative to the elongated body. The body and protractor arm include coacting structure for adjustably limiting angular displacement of the protractor arm to the extended position and the ends of the opposite side portions of the body remote from the protractor arm include two pairs of opposing sockets formed therein in which spirit level supporting annular bodies are mounted.

Abstract: A valve for regulating flow in a flow passage with the valve actuating mechanism being isolated from contact with the material passing through the valve and being responsive to various external conditions and adjustments which enables the valve to be utilized in many installations. The valve includes a plug assembly disposed axially of the valve body and the plug assembly includes a hollow stem and transverse ports adjacent the head of the valve to define the flow path for material through the valve.