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The Apollo 77C-100 series two-piece inline ball valve is made of bronze and has a lever handle and female National Pipe Taper (NPT) threaded connections on both ends. This valve is made of bronze for higher strength and corrosion resistance than brass and has a zinc-plated steel lever handle with a vinyl sleeve for manual on/off control. The 0.25-inch to 2-inch sizes are full port for reduced friction; the inner diameter is the same as the inner diameter of the pipe it connects to for maximum operating efficiency. The 2.5-inch size is standard (or regular) port for reduced valve size and cost. The maximum pressure is 600 pounds per square inch (gauge) (psig) for cold working pressure (CWP) and 150 for steam working pressure (SWP), and the temperature range is -20 to 500 degrees Fahrenheit. The valve is inline for connecting two pipes going in the same direction and has NPT threads on both ends for creating tighter seals than straight threads. Multifill polytetrafluoroethylene (MPTFE) seats and seals reduce the risk of valve leakage. This valve is for use in water lines, processing plants, and agricultural applications and meets standard MSS SP-110 for quality assurance. Ball valves use a spherical disc to control the flow between pipes, tubes, or hoses. Flow is allowed when the hole that pierces the ball-shaped disc is in line with the inlet and outlet of the valve. Flow is blocked when the ball is horizontally swiveled 90 degrees, so that the hole of the ball is perpendicular to the opening of the valve. Ball valves can be referred to as full port or reduced port (also known as regular or standard port) depending on the inner diameter of the valve. A ball valve is full port if the hole of the ball is the same size as the inner diameter of the connecting pipeline (resulting in lower friction) and is reduced port if the hole of the valve is one pipe size smaller than the pipe, resulting in less flow through the valve than through the sha