J41b ammonia shut-off valves often require gases such as oxygen, nitrogen, hydrogen, argon, etc. These gases are usually stored in dedicated high-pressure gases. When in use, the gas pressure is reduced to the required range for the experiment through an ammonia shut-off valve, and then finely adjusted through other control valves to input the gas into the system.
Structural characteristics
The flange of J41b ammonia shut-off valve is a square structure, and the valve stem is connected by a connecting rod.
2. The sealing surface of the valve body adopts a spherical convex shape, which is sealed with a line matching the valve foot.
3. The sealing surface is made of Babbitt alloy, which has good sealing performance and long service life. The main performance specifications are applicable to media such as liquid, gas, ammonia, nitrogen, and hydrogen. The applicable temperature is -10 ℃ -150 ℃
Test pressure of ammonia shut-off valve
nominal pressure PN(MPa) | test pressure (MPa) | |
Shell strength test | Sealing test | |
1.6 | 2.4 | 1.76 |
2.5 | 3.75 | 2.75 |
Main component materials of ammonia shut-off valve
product type | Part name | |||||
Valve body and valve cover | valve stem | filler | Sealing surface | shim | a fastening | |
J41B-16/25C | cast steel | carbon steel | teflon | Ba Di alloy | asbestos rubber sheet | High quality carbon steel |
J41B-16/25Q | nodular cast iron | carbon steel | teflon | Ba Di alloy | asbestos rubber sheet | High quality carbon steel |
J41B-16/25K | malleable iron | carbon steel | teflon | Ba Di alloy | asbestos rubber sheet | High quality carbon steel |
Main external dimensions of ammonia shut-off valve
Nominal Diameter DN(mm) | Main external dimensions and connection dimensions(mm) | ||||||||||
L | D | D1 | D2 | D6 | b | f | f2 | z-d | H | DO | |
J41B-16C J41B-16Q J41B-16K | |||||||||||
10 | 130 | 90 | 60 | 40 | 35 | 14 | 2 | 4 | 4-14 | 196 | 120 |
15 | 130 | 95 | 65 | 45 | 40 | 14 | 2 | 4 | 4-14 | 196 | 120 |
20 | 150 | 105 | 75 | 55 | 51 | 16 | 2 | 4 | 4-14 | 196 | 140 |
25 | 160 | 115 | 85 | 65 | 58 | 16 | 2 | 4 | 4-14 | 204 | 160 |
32 | 180 | 135 | 100 | 78 | 66 | 18 | 2 | 4 | 4-18 | 208 | 160 |
40 | 200 | 145 | 110 | 85 | 76 | 18 | 3 | 4 | 4-18 | 248 | 200 |
50 | 230 | 160 | 125 | 100 | 88 | 20 | 3 | 4 | 4-18 | 248 | 200 |
65 | 290 | 180 | 145 | 125 | 110 | 22 | 3 | 4 | 4-18 | 321 | 240 |
80 | 310 | 195 | 160 | 135 | 121 | 24 | 3 | 4 | 8-18 | 325 | 240 |
100 | 350 | 215 | 180 | 155 | 150 | 24 | 3 | 4.5 | 8-18 | 371 | 280 |
125 | 400 | 245 | 210 | 185 | 176 | 26 | 3 | 4.5 | 8-18 | 400 | 320 |
150 | 480 | 280 | 240 | 210 | 204 | 26 | 3 | 4.5 | 8-23 | 432 | 320 |
200 | 600 | 335 | 295 | 265 | 260 | 30 | 3 | 4.5 | 12-23 | 654 | 400 |
250 | 650 | 405 | 335 | 320 | 313 | 32 | 3 | 4.5 | 12-25 | 745 | 500 |
300 | 700 | 460 | 410 | 375 | 364 | 34 | 3 | 4.5 | 12-25 | 852 | 600 |
J41B-25C J41B-25Q J41B-25K | |||||||||||
10 | 130 | 90 | 60 | 40 | 35 | 16 | 2 | 4 | 4-14 | 196 | 120 |
15 | 130 | 95 | 65 | 45 | 40 | 16 | 2 | 4 | 4-14 | 196 | 120 |
20 | 150 | 105 | 75 | 55 | 51 | 16 | 2 | 4 | 4-14 | 196 | 120 |
25 | 160 | 115 | 85 | 65 | 58 | 18 | 2 | d | 4-14 | 201 | 120 |
32 | 180 | 135 | 100 | 78 | 66 | 18 | 2 | 4 | 4-18 | 208 | 120 |
40 | 200 | 145 | 110 | 85 | 76 | 20 | 2 | d | 4-18 | 248 | 160 |
50 | 230 | 160 | 125 | 100 | 88 | 20 | 3 | 4 | 4-18 | 248 | 160 |
65 | 290 | 180 | 145 | 125 | 110 | 22 | 3 | 4 | 8-18 | 321 | 240 |
80 | 310 | 195 | 160 | 135 | 121 | 24 | 3 | 4 | 8-18 | 325 | 240 |
100 | 350 | 230 | 190 | 160 | 150 | 24 | 3 | 4.5 | 8-23 | 371 | 280 |
125 | 400 | 270 | 220 | 188 | 176 | 30 | 3 | 4.5 | 8-25 | 400 | 320 |
150 | 480 | 300 | 250 | 218 | 204 | 30 | 3 | 4.5 | 8-25 | 432 | 320 |
200 | 600 | 360 | 310 | 278 | 260 | 34 | 3 | 4.5 | 12-30 | 654 | 400 |
250 | 650 | 425 | 370 | 332 | 313 | 42 | 3 | 4.5 | 12-34 | 745 | 500 |
300 | 750 | 485 | 430 | 390 | 364 | 46 | 3 | 4.5 | 12-34 | 852 | 600 |
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Address: Oubei Pump and Valve Industrial Park, Binhai Economic Development Zone, Jiangsu Province
15351513006