Page 634 - DixonCatalog20092010

632 DPL410 877.963.4966 • www.dixonvalve.com T
Technical
• 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
Ball Valve
Butterfly Valve Gate Valve
Check Valve Globe Valve
• where positive shut-off is necessary
• primarily for fully open or fully closed applications
• may be used for throttling
• only 90° rotation from open to fully closed
• lightweight
• easy to install
• less costly than an iron body gate valve
• for fully open or fully closed service - not for throttling
• for minimum line pressure drop
• for minimum fluid entrapment in the line
• for relatively infrequent operation
• To control the direction of flow and for quick, automatic
reactions to flow change. Swing check valves are used
when a minimum resistance to flow is required.
• 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.
• for regulation (throttling) of flow
• for frequent operation; short stem travel reduces operator's
time
• where some line resistance is acceptable