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This class 125 Milwaukee Valve 2885-M series iron gate valve has bronze-mounted seat rings, an outside screw and yoke, and flanged end connections for bolting to flanges. The cast-iron construction, bolted bonnet, and solid wedge gate provide compressive strength and resistance to wear. The bronze-mounted seat rings equip it for high pressure applications and help resist corrosion over time. The valve has an outside screw and yoke (OS&Y) rising stem, which visually signals when the valve is open by the extension of the screw out of the center of the manually operated cast-iron hand wheel. The 2-, 2-1/2-, and 2" models of this valve are made with the yoke integral with the bonnet while the 4" valves and larger have separate yokes that are bolted to their bonnet. The stem design and non-asbestos graphite internal packing also prevent the stem threads from coming into contact with flow to avoid corrosion, thereby extending the life of the valve. The valve’s maximum pressure is 200 pounds per square inch (gauge) (psig) for water, oil, and gas pressure (WOG) and 125 psig for saturated steam pressure. It has flanged end connections on both ends for bolting to compatible American National Standards Institute (ANSI) 125-lb. flanges. This class 125 valve meets Manufacturers Standardization Society (MSS) SP-70 standards and American Society of Mechanical Engineers (ASME) B.16.1 standards for flanged valves for quality assurance. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure. The valve is appropriate for use in plumbing, heating, and building service piping systems.
Gate valves control flow in a piping system by lifting a gate out of the path of steam, fluids, or gases. They are designed to block or permit flow, as the vibrations and force of flow repeatedly striking a partly lowered gate can damage the gate and seats. To accommodate different flows and pressure requirements, gates come in four types: solid wedge (appropriate for almost all liquid service), flexible wedge (appropriate for steam service), split wedge (appropriate for normal temperature, non-condensing gas and liquid service, including corrosive service), and parallel disk (appropriate for high and low pressure applications). Hand wheels or levers activate the screw mechanism in the valve’s bonnet, which comes in various designs, to open and close the gate. Union bonnets are preferable for building service piping, threaded-in (or screw-in) bonnets work well for lighter-duty usage, and bolted body-bonnet connections are used primarily in iron multi-turn valves. Most gate valves have either a rising stem, which moves up and down with the gate, or a non-rising stem, which remains fixed in place. When closed, the gate and its seats form tight planar sealing surfaces, ideal for linear liquid flow. Gate valves are used in air, gas, liquid, and steam applications.
The Milwaukee Valve Company manufactures manual and actuated valves, controls, and control accessories. The company, founded in 1901, and headquartered in New Berlin, WI, meets International Organization for Standardization (ISO) 9001:2008 and 14001:2004 standards.
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