Overview ............................................................................................................233

Shutoff ........................................................................................................233

Noise...........................................................................................................235

Flashing and Cavitation ..............................................................................235

Pressure Drop.............................................................................................235

Installation...................................................................................................236

The Cv

Valve Bodies...............................................................................................237

Rules of Thumb ..........................................................................................237

Cooling Fins (Radiating Bonnet) and Bonnet Extensions...........................238

Bellows Seals and Packing.........................................................................238

Comparison Table..............................................................................................238

Globe ..........................................................................................................238

Diaphragm (Saunders) ...............................................................................243

Ball..............................................................................................................244

Butterfly.......................................................................................................245

Eccentric Rotary Plug .................................................................................246

Trim....................................................................................................................246

Actuators............................................................................................................248

http://abzardaghigh.ir/duh/doc_download/23-----.html