Customization: | Available |
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Media: | Wog |
Temperature: | High Temperature |
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Ammonia globe valve 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 globe valve, and then finely adjusted through other control valves to input the gas into the system. The most commonly used pressure reducing valve is the ammonia globe valve, abbreviated as ammonia valve.
The high-pressure chamber of the ammonia valve is connected to the steel cylinder, while the low-pressure chamber serves as the gas outlet and leads to the usage system. The reading of the high-pressure gauge is the pressure of the gas stored in the steel cylinder. The outlet pressure of the low-pressure gauge can be controlled by adjusting the screw.
When using, first turn on the main switch of the steel cylinder, then rotate the pressure regulating screw of the low-pressure gauge clockwise to compress the main spring and drive the film, spring pad, and top rod to open the valve. The high-pressure gas imported in this way enters the low-pressure chamber through throttling and pressure reduction, and is then directed to the working system through the outlet. Rotate the adjusting screw to change the height of the valve opening, thereby adjusting the flow rate of high-pressure gas and achieving the desired pressure value.
Ammonia shut-off valves are equipped with safety valves. It is a device that protects the ammonia pressure reducing valve and ensures its safe use, as well as a signal device for the malfunction of the ammonia pressure reducing valve. If the outlet pressure rises on its own and exceeds a certain allowable value due to valve gasket, valve damage, or other reasons, the safety valve will automatically open for exhaust.
(1) There are many specifications of ammonia globe valve according to different usage requirements. The maximum import pressure is mostly, and the minimum import pressure is not less than 2.5 times the export pressure. There are many specifications for export pressure, generally, with a maximum export pressure of.
(2) When installing ammonia globe valve, it should be determined whether their connection specifications are consistent with the joints of the system being used. The ammonia shut-off valve adopts a hemispherical connection, and the two are fully matched by tightening the nut. Therefore, both hemispheres should be kept smooth during use to ensure good airtightness. Before installation, high-pressure gas can be used to blow away dust. If necessary, materials such as polytetrafluoroethylene can also be used as gaskets.
(3) Ammonia globe valve should be strictly prohibited from coming into contact with grease to avoid fire accidents.
(4) When stopping work, the residual air in the pressure reducing valve should be released completely, and then the adjusting screw should be loosened to prevent the elastic element from being deformed under long-term pressure.
(5) Ammonia globe valve should avoid impact and vibration, and should not come into contact with corrosive substances.
The usage method and precautions of these ammonia globe valve are basically the same as those of ammonia globe valve. However, it should also be pointed out that specialized ammonia valves are generally not used for other gases. To prevent misuse, some ammonia valves use special connection ports between them and steel cylinders. For example, both hydrogen and propane use left threaded threads, also known as reverse threads, and special attention should be paid during installation.
DN |
L | α | H | DO | PNl.6/MPa | PN2.5/MPa | ||
D | D1 | D | D1 | |||||
50 | 250 | 37o30' | 334 | 250 | 58 | 50 | 64 | 4g |
65 | 270 | 37o30' | 439 | 250 | 75 | 65 | 82 | 67 |
80 | 280 | 37o30' | 495 | 300 | 91 | 79 | 95 | 77 |
100 | 300 | 37o30' | 575 | 350 | 11O | 97 | 117 | 101 |
125 | 325 | 37o30' | 587 | 350 | 136 | 121 | 144 | 126 |
150 | 350 | 37o30' | 607 | 350 | 163 | 146 | 172 | 158 |
200 | 400 | 37o30' | 740 | 400 | 223 | 202 | 223 | 202 |
250 | 450 | 37o30' | 863 | 400 | 278 | 254 | 278 | 254 |
300 | 500 | 37o30' | 990 | 400 | 330 | 305 | 330 | 305 |
350 | 550 | 37o30' | 1137 | 500 | 382 | 352 | 382 | 352 |
400 | 600 | 37o30' | 1523 | 500 | 432 | 399 | 432 | 39g |
450 | 650 | 37o30' | 1618 | 600 | 485 | 451 | 485 | 451 |
500 | 700 | 37o30' | 1657 | 600 | 535 | 501 | 535 | 499 |
600 | 800 | 37o30' | 1746 | 700 | 636 | 601 | 636 | 599 |
DN | L | D | α | PN4.0MPa | PN6.4/MPa | PN10.0MPa | ||||||
D1 | H | D0 | D1 | H | DO | D1 | H | D0 | ||||
50 | 250 | 64 | 37o30' | 49 | 345 | 300 | 50 | 350 | 300 | 49 | 350 | 300 |
65 | 270 | 83 | 37o30' | 67 | 441 | 300 | 66 | 447 | 300 | 64 | 447 | 300 |
80 | 280 | 96 | 37o30' | 79 | 495 | 350 | 77 | 499 | 350 | 75 | 499 | 350 |
100 | 300 | 117 | 37o30' | 101 | 575 | 350 | 99 | 582 | 400 | 87 | 582 | 400 |
125 | 325 | 144 | 37o30' | 126 | 587 | 400 | 129 | 590 | 400 | 125 | 590 | 400 |
150 | 350 | 172 | 37o30' | 152 | 607 | 400 | 150 | 611 | 450 | 145 | 611 | 450 |
200 | 400 | 223 | 37o30' | 200 | 740 | 450 | 198 | 745 | 550 | 190 | 747 | 550 |
250 | 450 | 278 | 37o30' | 252 | 863 | 550 | 246 | 867 | 650 | 236 | 869 | 650 |
300 | 500 | 330 | 37o30' | 302 | 1008 | 650 | 294 | 1008 | 750 | 282 | 1013 | 750 |
350 | 550 | 382 | 37o30' | 350 | 1142 | 750 | 342 | 1148 | 800 | 334 | 1148 | 850 |
400 | 650 | 432 | 37o30' | 397 | 1527 | 850 | 387 | 1531 | 900 | 377 | 1533 | 950 |