 
First, BJ41W stainless steel insulation cut-off valve product use
Insulation stop valve is mainly used for petroleum, chemical, metallurgical, pharmaceutical and other systems to transport at room temperature will be solidified high viscosity medium.
  
Second, BJ41W stainless steel insulation cut-off valve implementation of the standard
  design and manufacture: BS1873 BS5160 GB12233 
  flange size: ANSIB16.5 JB / T79 GB9113 
  pressure temperature: ANSIB16.34 
  structure length: ANSIB16.10 BS1873 GB12221 
  butt welding connection size: ANSIB16.25 
  test And experiment: BS6755 GB / T13927
  
Third, BJ41W stainless steel insulation valve main performance specifications
| model | Nominal pressure PN (MPa) | Test pressure PS (MPa) | Applicable temperature (℃) | Applicable media | Insulation pressure (MPa) | |
| case | seal | |||||
| BJ41W-16P.RC | 1.6 | 2.4 | 1.8 | ≤ 350 | Nitric acid | ≤1.0 | 
| BJ41W-25P.RC | 2.5 | 3.8 | 2.8 | ≤ 350 | Nitric acid | ≤1.0 | 
Fourth, BJ41W stainless steel insulation cut-off valve main dimensions and connection size (II-type flange level)
| model | Nominal diameter DN (mm) | Size (mm) | |||||||
| L | D | D1 | D2 | Bf | Z-φ | H | D0 | ||
| BJ41WH-16PRC | 15 | 130 | 95 | 65 | 45 | 16-2 | 4-14 | 170 | 120 | 
| 20 | 150 | 105 | 75 | 55 | 16-2 | 4-14 | 190 | 140 | |
| 25 | 160 | 115 | 85 | 65 | 16-2 | 4-14 | 205 | 160 | |
| 32 | 180 | 135 | 100 | 78 | 18-2 | 4-18 | 270 | 180 | |
| 40 | 200 | 145 | 110 | 85 | 18-3 | 4-18 | 310 | 200 | |
| 50 | 230 | 160 | 125 | 100 | 18-3 | 4-18 | 358 | 240 | |
| 65 | 290 | 180 | 145 | 120 | 18-3 | 4-18 | 373 | 280 | |
| 80 | 310 | 195 | 160 | 135 | 20-3 | 8-18 | 435 | 320 | |
| 100 | 350 | 215 | 180 | 155 | 20-3 | 8-18 | 500 | 360 | |
| 125 | 400 | 245 | 210 | 185 | 22-3 | 8-18 | 614 | 400 | |
| 150 | 480 | 280 | 240 | 210 | 24-3 | 8-23 | 674 | 400 | |
| 200 | 600 | 335 | 295 | 265 | 26-3 | 12-23 | 818 | 450 | |
| 250 | 730 | 405 | 355 | 320 | 30-3 | 12-25 | 969 | 550 | |
| Model | Nominal diameter DN (mm) | Size (mm) | |||||||
| L | D | D1 | D2 | Bf | Z-φ | H | D0 | ||
| BJ41WH-25PRC | 15 | 130 | 95 | 65 | 45 | 16-2 | 4-14 | 233 | 120 | 
| 20 | 150 | 105 | 75 | 55 | 16-2 | 4-14 | 275 | 140 | |
| 25 | 160 | 115 | 85 | 65 | 16-2 | 4-14 | 285 | 160 | |
| 32 | 180 | 135 | 100 | 78 | 18-2 | 4-18 | 302 | 180 | |
| 40 | 200 | 145 | 110 | 85 | 18-3 | 4-18 | 355 | 200 | |
| 50 | 230 | 160 | 125 | 100 | 20-3 | 4-18 | 362 | 240 | |
| 65 | 290 | 180 | 145 | 120 | 22-3 | 8-18 | 400 | 280 | |
| 80 | 310 | 195 | 160 | 135 | 22-3 | 8-18 | 430 | 320 | |
| 100 | 350 | 230 | 190 | 160 | 24-3 | 8-23 | 465 | 360 | |
| 125 | 400 | 270 | 220 | 188 | 28-3 | 8-25 | 550 | 400 | |
| 150 | 480 | 300 | 250 | 218 | 30-3 | 8-25 | 700 | 400 | |
| 200 | 600 | 360 | 310 | 278 | 343 | 12-25 | 780 | 450 | |
| 250 | 730 | 425 | 370 | 335 | 36-3 | 12-30 | 900 | 550 | |
| Model | Nominal diameter DN (mm) | Size (mm) | ||||||
| L | D | D1 | D2 | Bf | Z-φ | H | ||
| BJ41WH-40PRC | 15 | 130 | 95 | 65 | 45 | 16-2 | 4-14 | 233 | 
| 20 | 150 | 105 | 75 | 55 | 16-2 | 4-14 | 275 | |
| 25 | 160 | 115 | 85 | 65 | 16-2 | 4-14 | 285 | |
| 32 | 180 | 135 | 100 | 78 | 18-2 | 4-18 | 302 | |
| 40 | 200 | 145 | 110 | 85 | 18-3 | 4-18 | 355 | |
| 50 | 230 | 160 | 125 | 100 | 20-3 | 4-18 | 370 | |
| 65 | 290 | 180 | 145 | 120 | 22-3 | 8-18 | 408 | |
| 80 | 310 | 195 | 160 | 135 | 22-3 | 8-18 | 436 | |
| 100 | 350 | 230 | 190 | 160 | 24-3 | 8-23 | 475 | |
| 125 | 400 | 270 | 220 | 188 | 28-3 | 8-25 | 558 | |
| 150 | 480 | 300 | 250 | 218 | 30-3 | 8-25 | 720 | |
| 200 | 600 | 375 | 320 | 282 | 38-3 | 12-30 | 800 | |
| BJ41WH-64PRC | 15 | 170 | 105 | 75 | 55 | 18-2 | 4-14 | 240 | 
| 20 | 190 | 125 | 90 | 68 | 20-2 | 4-18 | 280 | |
| 25 | 210 | 135 | 100 | 78 | 22-2 | 4-18 | 290 | |
| 32 | 230 | 150 | 110 | 82 | 24-2 | 4-23 | 325 | |
| 40 | 260 | 165 | 125 | 95 | 24-3 | 4-23 | 360 | |
| 50 | 300 | 175 | 135 | 105 | 26-3 | 4-23 | 410 | |
| 65 | 340 | 200 | 160 | 130 | 28-3 | 8-23 | 430 | |
| 80 | 380 | 210 | 170 | 140 | 30-3 | 8-23 | 465 | |
| 100 | 430 | 250 | 200 | 168 | 32-3 | 8-25 | 537 | |
| 125 | 500 | 240 | 202 | 36-3 | 8-30 | 630 | ||
| 150 | 550 | 340 | 280 | 240 | 38-3 | 8-34 | 790 | |
| 200 | 650 | 405 | 345 | 300 | 44-3 | 12-34 | 910 | |