Special Features:

5this stem/disc assembly is comprised of: pc 4 disc (metallic stop) 1 and pc 89 stem (stop) 1; dwg calls this item "stem disc assembly cl a"; for class "a" valves (those with metallic disc seating surface); alternate material is nickel alloy iaw qq-n-281

Properties:

An item usually metallic, threaded or unthreaded, used for securing to or positioning into a mating part. It is designed to be used in a globe, relief, regulator valve and the like as a means of controlling the flow of liquids or gases in a given system. One end may have an integral disk or be designed to accommodate a metallic or nonmetallic disk. The other end is designed for a handwheel, lever, spring, diaphragm and the like for nonpowered operation or to accommodate a gear, solenoid, air motor and the like for powered operation. The handwheel and/or disk may be furnished with the item. Excludes stem, faucet; and stem, needle valve.