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Unit I: Legends,
| IDENTIFYING VALVES Valves come in many types, shapes, and sizes for a building's water plumbing system. The most common types used in a water pipeline system are gate, globe, and check valves. Plumbing fixtures also require valves such as flushometers and faucets. When a valve leaks or fails to operate properly, it has to be repaired. The repair may require a partial or complete disassembly of the valve. A repaired valve must restore the valve to a totally serviceable operating condition. Pipeline Valves. Valves used in water pipelines are illustrated here. A gate valve completely shuts off the flow of water (figure 1).
Figure 1. Gate Valve A globe valve regulates or controls the flow of water (figure 2).
Figure 2. Globe Valve An angled globe valve regulates or controls and changes the direction of the flow of water (figure 3).
Figure 3. Angled Globe Valve A check valve makes water flow in one direction only, then closes automatically to prevent backflow (figure 4).
Figure 4. Swing Check Valve Faucets. Valves (faucets) used for plumbing fixtures, such as lavatories and sinks, are illustrated in figures 5, 6, 7, and 8. A single faucet with plain bibb turns hot or cold water flow on and off (figure 5).
Figure 5. Single Faucet with Plain Bibb A single faucet with hose bibb turns hot or cold water flow on and off (figure 6).
Figure 6. Single Faucet with Hose Bibb A combination faucet with hot and cold water handles turns water flow on and off (figure 7).
Figure 7. Combination Faucet with Handles A combination faucet with a single lever turns hot and cold water flow on and off (figure 8).
Figure 8. Combination Faucet with Lever Flushometers. Flushometer valves used for plumbing fixtures such as water closets and urinals are illustrated in figures 9 and 10. Both types of flushometer valves, diaphragm and piston, discharge a fixed amount of water for flushing fixtures. The amount is activated by direct water pressure.
Figure 9. Diaphragm Flushometer Valve
Figure 10. Piston Flushometer Valve |
| Most of the content of this course is provided courtesy of US Army Engineer School, Fort Leonard Wood, Missouri |
Copyright � David L Heiserman |
