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Marine_info_9_Valves

Marine_info_9_Valves - VALVES Moving fluids Valves Defn...

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VALVES Moving fluids Moving fluids
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Valves Def’n: devices which control the amount and direction of fluid flow in piping systems a Typically made of bronze, brass, iron, or steel alloy Components: - Valve body - Packing - Disc - Packing gland/nut - Seat - Stem - Bonnet - Wheel
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Types of Valves Two basic groups: a Stop valves - used to shut off or partially shut off the flow of fluid ( ex: globe, gate, plug, needle, butterfly) a Check Valves - used to permit flow in only one direction (ex: ball-check, swing-check, lift-check) Special types: a Relief valves a Pressure-reducing valves a Remote-operated valves
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Stop Valves Globe Valves Globe Valves a Most common type of stop valve a a Disc attached to valve stem rests against seat to shut off flow of fluid a Adv : Used for throttling a Disadv : flow resistance
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Globe Valve
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Gate Valves Gate Valves a Used when there must be straight-line flow of fluid w/ min. resistance
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Marine_info_9_Valves - VALVES Moving fluids Valves Defn...

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