This class 125 Apollo 101S Series bronze gate valve has a rising stem and solder end connections on both ends. The bronze construction, its solid wedge gate, and screw-in bonnet provide higher strength and resistance to corrosion than brass. It has a rising stem with an inside screw that moves up and down with the gate that provides a visual signal (when extended) that the valve is open. This rising stem design and graphite internal packing also prevent the stem threads from coming into contact with flow to avoid corrosion to extend valve life. 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 maximum pressure for this class 125 valve is 200 pounds per square inch (gauge) (psig) for cold working pressure (CWP) and 125 psig for steam working pressure (SWP), and the valve has a temperature range of -20 to 406 degrees Fahrenheit. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure. It has solder end connections on both ends for a semi-permanent connection to a piping system. Mounted on top of the valve, a manually operated malleable iron hand wheel activates the inside screw mechanism which lifts and lowers the gate to start and stop the flow between the connected pipes. This valve comes with a five-year warranty for workmanship and material defects. The valve meets Manufacturers Standardization Society (MSS) SP-80 for quality assurance, and it is appropriate for use in various plumbing and heating applications, including use in building service pipe and HVAC 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.