This class 250 Apollo 621F series cast iron gate valve has cast bronze seat rings, an outside screw and yoke, and flanged connections for bolting to pipe flanges. The cast iron construction and its bolted bonnet and solid wedge gate provide compressive strength and resistance to wear. The bronze-mounted seat rings equip it for higher pressure applications and help resist corrosion and erosion over time. The valve has a rising stem with an outside screw and yoke (OS&Y), which visually signals when the valve is open by the extension of the screw out of the center of the manually operated hand wheel. The rising stem design and the graphite internal packing also prevent the stem threads from coming into contact with flow to avoid corrosion, thereby extending the life of the valve. This gate valve is full port for reduced friction; its inner diameter is the same as the inner diameter of the pipe it connects to enable maximum operating efficiency. The valve’s maximum pressure is 500 pounds per square inch (gauge) (psig) for cold working pressure (CWP) and 250 psig for steam working pressure (SWP), and the valve has a temperature range of -20 to 406 degrees Fahrenheit. It has flanged end connections on both ends for bolting the valve to compatible-sized class 250 pipe flanges. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure. This valve comes with a two-year warranty for workmanship and material defects. The valve meets Manufacturers Standardization Society (MSS) SP-70 and American Society of Mechanical Engineers (ASME) B.16.1 for quality assurance, and it is appropriate for use in various plumbing and heating applications, including use in building service pipe 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 disc (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.
Conbraco Industries, Inc. manufactures ball, mixing, and relief valves, actuators, water gauges, marine fittings, heating and plumbing products, and backflow prevention devices under the Apollo Valves brand. The company, founded in 1928 and headquartered in Matthews, NC, meets international standard ISO/IEC 17025:2005 and makes products that meet International Organization for Standardization (ISO) and American National Standards Institute (ANSI) standards.
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Made from cast iron for compressive strength and resistance to wear
Cast bronze mounted seat rings and back seat protection to reduce erosion and corrosion
Rising stem with an outside screw and yoke (OS&Y) extends through hand wheel when valve is open
500 pounds per square inch (gauge) (psig) for cold working pressure (CWP) and 250 psig for steam working pressure (SWP)
Flanged end connections for bolting to compatible-sized pipe flanges
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