Product Name: Ammonia valve 
 Model: J41B 



 ◆ structural characteristics and uses of 

 1. Through the flange in a square structure, valve stem connection between the lever. 
 2. Ball valve sealing surface with convex parts, consistent with the valve pin seal the line. 
 3. Sealing surface of babbitt, good sealing performance and long service life 

 ◆ Main Performance Specifications 

 Medium: liquid, gas, ammonia, nitrogen, hydrogen 
 Suitable temperature: -10 ℃ -150 ℃ 

 Test pressure 


 Nominal pressure PN (MPa) 
 Test pressure (MPa) 

 Shell strength test 
 Seal test 

 1.6 
 2.4 
 1.76 

 2.5 
 3.75 
 2.75 



 ◆ Major parts material 


 Product Type 
 Part Name 

 Body, bonnet 
 Stem 
 Filler 
 Sealing surface 
 Gasket 
 Fastener 

 J41B-16/25C 
 Cast 
 Carbon Steel 
 PTFE 
 BaDi alloy 
 Asbestos rubber sheet 
 High-quality carbon steel 

 J41B-16/25Q 
 Ductile iron 
 Carbon Steel 
 PTFE 
 Babbit 
 Asbestos rubber sheet 
 High-quality carbon steel 

 J41B-16/25K 
 Malleable iron 
 Carbon Steel 
 PTFE 
 Babbit 
 Asbestos rubber sheet 
 High-quality carbon steel 



 ◆ Main Size Chart 


 DN 
 DN (mm) main dimensions and connection dimensions (mm) 
 LD D1 D2 D6 bf f2 zd H DO 
 J41B-16C J41B-16Q J41B-16K 
 10 130,906,040,351,424 4-14 196 120 
 15 130,956,545,401,424 4-14 196 120 
 20 1,501,057,555,511,624 4-14 196 140 
 25 1,601,158,565,581,624 4-14 204 160 
 3,218,013,510,078,661,824 4-18 208 160 
 4,020,014,511,085,761,834 4-18 248 200 
 5,023,016,012,510,088,203 4 4-18 248 200 
 65 2,901,801,451,251,102,234 4-18 321 240 
 80 3,101,951,601,351,212,434 8-18 325 240 
 100 350,215,180,155,150 24 3 4.5 8-18371280 
 125 400,245,210,185,176 26 3 4.5 8-18400320 
 150 480,280,240,210,204 26 3 4.5 8-23432320 
 200 600,335,295,265,260 30 3 4.5 12-23654400 
 250 650,405,335,320,313 32 3 4.5 12-25745500 
 300 700,460,410,375,364 34 3 4.5 12-25852600 
 J41B-25C J41B-25Q J41B-25K 
 10 130,906,040,351,624 4-14 196 120 
 15 130,956,545,401,624 4-14 196 120 
 20 1,501,057,555,511,624 4-14 196 120 
 25 160 115 85 65 58 18 2 d 4-14 201 120 
 3,218,013,510,078,661,824 4-18 208 120 
 40 200 145 110 85 76 20 2 d 4-18 248 160 
 5,023,016,012,510,088,203 4 4-18 248 160 
 65 2,901,801,451,251,102,234 8-18 321 240 
 80 3,101,951,601,351,212,434 8-18 325 240 
 100 350,230,190,160,150 24 3 4.5 8-23371280 
 125 400,270,220,188,176 30 3 4.5 8-25400320 
 150 480,300,250,218,204 30 3 4.5 8-25432320 
 200 600,360,310,278,260 34 3 4.5 12-30654400 
 250 650,425,370,332,313 42 3 4.5 12-34745500 
 300 750,485,430,390,364 46 3 4.5 12-34852600