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.
standard packing available on the current valves is the EPDM (Ethylene Propylene Diene Monomer) Ring Pack as shown in Figure 4. Many of the discontinued JCI valves used a Teflon or graphite packing. The Actuator consists of either pneumatic or electric means to provide the force to stroke the valve. Consult Section Va: Valve Actuator in the
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