【Usage】 
 200X pressure reducing valve to control the main valve of the fixed outlet pressure, not because of changes in inlet pressure upstream of the main valve to change, not due to lower exports of the main water valve to change its outlet pressure changes. 
 Shape and size of the main connection 

 DN 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 
 L 150 160 180 200 203 216 241 292 330 356 495 622 698 787 914 978 
 H1 179 179 179 210 210 215 245 305 365 415 510 560 658 696 735 735 
 H 342 342 342 395 395 405 430 510 560 585 675 730 760 840 910 910