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Valve Selection Guide Valve Selection Guide Ball Valve � Can be used for on and off service or throttling. � When positive shut-off is necessary � Where a low valve profile is necessary � Only 90� rotation from open to fully closed (quick opening) � Handle position is a quick indication of whether valve is open or closed. � Full port ball valves do not resist flow Butterfly Valve Gate Valve � Where positive shut-off is necessary � For fully open or fully closed service - not for throttling � Primarily for fully open or fully closed applications � For minimum line pressure drop � May be used for throttling. � For minimum fluid entrapment in the line � Only 90� rotation from open to fully closed � For relatively infrequent operation � Lightweight � Easy to install � Less costly than an iron body gate valve. Check Valve Globe Valve � To control the direction of flow and for quick, � For regulation (throttling) of flow automatic reactions to flow change. � For frequent operation; short stem travel reduces Swing check valves are used when a minimum operator's time resistance to flow is required. � Where some line resistance is acceptable � Swing check valves are recommended for use in conjunction with gate valves. They should not be used in a rapid recycling system such as reciprocating pumps or air compressor service where they could cause chatter and damaging vibration. 550 DPL108 pages518-554.pmd 550 10/5/2007, 10:29 AM Valve Selection Guide
Goodyear Rubber Products
