Gas gate valve, suitable for medium: blast furnace gas, coke oven gas, producer gas, water gas, oil gas and other sewage gas, and liquefied gas, natural gas, mine gas and other clean gas. It is mainly used in coal to gas, metallurgy, coking and other industries and city gas pipeline network.
The valve body is of cast structure. The valve seat adopts O-ring seal and floating seat structure with preload to make the inlet and outlet of the valve seal in both directions; and the opening and closing torque of this structure is only 1 / 2 of the ordinary valve, which can easily open and close the valve. The valve seat is inlaid with PTFE on the sealing surface, which has the double sealing of PTFE to metal and metal to metal, and the PTFE sealing surface can remove the sludge of the gate at the same time. The valve gate, whether fully opened or fully closed, is always consistent with the sealing surface, which is protected from direct erosion by medium, thus prolonging its service life. When the valve is fully open, the channel is smooth and straight, the flow resistance coefficient is very small, and there is no pressure loss. The pipeline can be cleaned by using the hairball. When the valve is closed, it can automatically remove the high pressure in the inner chamber (see the original working drawing for details) to ensure the safety of use. Using closed gear to turn the opening and closing indicating mechanism can clearly reflect the opening and closing situation of the valve for a long time. The outer surface of directly buried valve is treated with epoxy coal tar pitch, which can have the same service life as the pipeline.
Structure length: GB/T 15188.2-94
Flange connection size: GB/T 9113-2000
Inspection and testing: GB/T 13927-92
Nominal diameter: DN300 ~ 1600mm
Pressure range: PN1 ~ 2MPa
Working temperature: Rubber ≤100℃ Teflon seal ≤100℃ Hard seal ≤100℃
Main material: gray cast iron
Suitable medium: gas
DN/mm |
L |
D |
D1 |
D2 |
b |
Z-Φd |
≈H |
L1 |
D0 |
300 |
330 |
435 |
395 |
362 |
24 |
12-23 |
1236 |
325 |
250 |
350 |
330 |
485 |
445 |
412 |
26 |
12-23 |
- |
325 |
250 |
400 |
330 |
535 |
495 |
462 |
28 |
16-23 |
1493 |
325 |
250 |
450 |
330 |
590 |
550 |
518 |
28 |
16-23 |
1975 |
394 |
320 |
500 |
350 |
640 |
600 |
568 |
30 |
16-23 |
2063 |
394 |
320 |
600 |
390 |
780 |
725 |
685 |
36 |
20-30 |
2513 |
389 |
451 |
700 |
430 |
895 |
840 |
800 |
40 |
24-30 |
2878 |
389 |
451 |
800 |
470 |
1010 |
950 |
905 |
44 |
24-34 |
3528 |
439 |
520 |
900 |
510 |
1110 |
1050 |
1005 |
46 |
28-34 |
3688 |
439 |
520 |
1000 |
550 |
1220 |
1160 |
1115 |
50 |
28-34 |
3938 |
439 |
520 |
1200 |
700 |
1450 |
1380 |
1325 |
56 |
32-41 |
4872 |
586 |
804 |
1400 |
900 |
1675 |
1590 |
1525 |
62 |
36-48 |
5540 |
586 |
804 |
1600 |
1000 |
1915 |
1820 |
1750 |
68 |
40-54 |
6300 |
586 |
804 |