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| Media: | Gas,Water |
| Temperature: | High Temperature |
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Vacuum Negative-Pressure Safety Valve (TFA72W-10R) Tive pressure system with temperature 200. When the netative pressure in the container exceeds the allowable value, the valve will open automatically and absorbs air When the netative pressure in the container reaches the allowable value, the valve will close automatically so as to protect the equipment and the system. It is to be installed in normal non-negative pressure systems. When the discharge valve of the container and system has not opened, which produces the negative pressure, this valve will open TFA72W is applicable in nega-automatically.
| NO. | Name of part | TFA72W-P Materials | TFA72W-R Materials |
| 1 | Body | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| 2 | Seat | 1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| 3 | Adjusting ring | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 4 | Bonnet | ZG1Cr18Ni9Ti | 1Cr18Ni9Ti |
| 5 | Stem | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 6 | Spring | 50CrVA | 50CrVA Coated |
| Working temperature | 200 |
| Suitable medium | TFA72W-10P Nitric acid etc. medium |
| TFA72W-10R Acetic acid etc. medium |
| Explanation of materials for main parts | |||||||
| Nominal diameter DN(mm) |
Dimensions | ||||||
| D | D 1 | D 2 | Z- d | b | f 1 | H | |
| 15 | 95 | 65 | 45 | 4-14 | 14 | 2 | 110 |
| 20 | 105 | 75 | 55 | 4-14 | 16 | 2 | 130 |
| 25 | 115 | 85 | 65 | 4-14 | 16 | 2 | 150 |
| 32 | 140 | 100 | 78 | 4-18 | 18 | 2 | 180 |
| 40 | 150 | 110 | 85 | 4-18 | 18 | 3 | 200 |
| 50 | 165 | 125 | 100 | 4-18 | 20 | 3 | 221 |
| 80 | 200 | 160 | 135 | 4-18 | 22 | 3 | 245 |
| 100 | 220 | 180 | 155 | 8-18 | 22 | 3 | 253 |
| 125 | 250 | 210 | 185 | 8-18 | 24 | 3 | 280 |
| 150 | 285 | 240 | 210 | 8-23 | 24 | 3 | 329 |
| 200 | 340 | 295 | 265 | 8-23 | 26 | 3 | 377 |
| 250 | 395 | 350 | 320 | 12-23 | 28 | 3 | 440 |
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