Transcription of Section Vb1: Valves - Johnson Controls
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Section Vb1: Valves - Johnson Controls
Valve and Actuator Manual 977 Valve Basics and sizing Information SectionEngineering Data Book Vb1 Issue Date 0294 1994 Johnson Controls , No. LIT-347 VbControl ValvesPage 3 Valve Components3 Valve Parameters5 Valve Flow Characteristic5 Pressure Shift at Valve6 Valve Gain7 Valve Plugs8 Rangeability9 Cavitation10 Coil Theory13 Water Coils13 Steam Coils14 Valve Sizing16 Valve Flow Coefficient16 Pressure Drop Across the Valve17 sizing Water Valves18 Examples18 Solutions Other Than Water19 sizing Steam Valves20 Examples22 Gases Other Than Steam23 Three Way Valves23 Valve Selection Summary25 Maximum Temperature and Pressure Ratings29 Glossary30 Section Vb1: Valves2 Vb1 Engineering Data BookVb1 Engineering Data Book 3 ValvesThe valve is a controlled device that regulates the flow of a liquid or gas ina system. This regulation is accomplished by the varying resistance thatthe valve introduces into the system as the valve is stroked.
Coil Theory 13 • Water Coils 13 • Steam Coils 14 Valve Sizing 16 • Valve Flow Coefficient 16 • Pressure Drop Across the Valve 17 • Sizing Water Valves 18 • Examples 18 • Solutions Other Than Water 19 • Sizing Steam Valves 20 ... The factor that is most useful in selecting a valve type for a given application is the flow ...
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