DSZ44H Water Seal Gate Valve product features
1, the use of flange bolts connection, both ends of the branch pipe flange connection or butt welding connection.
2, Stuffing box is designed into a water seal structure, access to 0.6 ~ 1.6Mpa water filler, small friction, sealed, the system can be isolated from the atmosphere, to ensure good air tightness.
3, the opening and closing pieces of double gate with two-way flexible seal, open and close easily, sealed, good performance.
4, the stem by quenching and nitriding surface treatment, good corrosion resistance, scratch resistance and wear resistance.
5, the structure is simple, compact and reasonable, easy maintenance, long life, handsome in appearance.
6, the valve work must be fully open or fully closed position, can not do with the control valve.
Main components of DSZ44H Water Seal Gate Valve
| Shell material | Suitable media | Applicable temperature ℃ |
| Carbon steel (C) | Water, steam, oil | ≤425 |
| Chrome Nickel Stainless Steel (P) | Nitric acids | ≤200 |
| Chromium nickel molybdenum stainless steel (R) | Acetic acid | ≤200 |
| Chrome-molybdenum steel (I) | Water, steam, oil | ≤550 |
| Part Name | material | |||
| Body | WCB | ZG1Cr5Mo | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| Valve plate | WCB | 1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| cap | WCB / 25 | ZG1Cr5Mo | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| Valve stem | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| filler | Vacuum combination filler | |||
| Stem nut | Aluminum bronze | |||
| Handwheel | Malleable iron | |||
DSZ44H Water Seal Gate Valve main dimensions
| Nominal pressure | test pressure | |||
| case | Sealed (water) | Seal (gas) | Sealed (water) | |
| 1.6 | 2.4 | 1.8 | 0.6 | 1.8 |
DSZ44H Water Seal Gate Valve Nominal pressure 1.6 MPa
| DN | L1 | L2 | D | D1 | D2 | b | f | zd | Dn | A | B | H | H1 | DO | RF | BW |
| 50 | 250 | 216 | 160 | 125 | 100 | 16 | 3 | 4-18 | 49 | 57 | 66 | 398 | 458 | 250 | 28 | 24 |
| 65 | 270 | 241 | 180 | 145 | 120 | 18 | 3 | 4-18 | 66 | 73 | 83 | 438 | 514 | 250 | 40 | 35 |
| 80 | 280 | 283 | 195 | 160 | 135 | 20 | 3 | 8-18 | 78 | 89 | 96 | 456 | 539 | 300 | 55 | 50 |
| 100 | 300 | 305 | 215 | 180 | 155 | 20 | 3 | 8-18 | 96 | 108 | 117 | 514 | 614 | 300 | 75 | 66 |
| 125 | 325 | 381 | 245 | 210 | 185 | 22 | 3 | 8-18 | 121 | 133 | 144 | 600 | 750 | 350 | 110 | 96 |
| 150 | 350 | 403 | 280 | 240 | 210 | 24 | 3 | 8-23 | 146 | 159 | 172 | 680 | 825 | 350 | 150 | 133 |
| 200 | 400 | 419 | 335 | 295 | 265 | 26 | 3 | 12-23 | 202 | 219 | 222 | 800 | 1000 | 400 | 223 | 203 |
| 250 | 450 | 457 | 405 | 355 | 320 | 30 | 3 | 12-25 | 254 | 273 | 278 | 840 | 1080 | 450 | 325 | 295 |
| 300 | 500 | 502 | 460 | 410 | 375 | 30 | 4 | 12-25 | 303 | 325 | 330 | 990 | 1280 | 450 | 430 | 395 |
| 350 | 550 | 572 | 520 | 470 | 435 | 34 | 4 | 16-25 | 351 | 377 | 382 | 1135 | 1470 | 600 | 570 | 510 |
| 400 | 600 | 610 | 580 | 525 | 485 | 36 | 4 | 16-30 | 398 | 426 | 432 | 1410 | 1815 | 650 | 740 | 665 |
| 450 | 650 | 660 | 640 | 585 | 545 | 40 | 4 | 20-30 | 450 | 480 | 484 | 1475 | 1925 | 700 | 955 | 860 |
| 500 | 700 | 711 | 705 | 650 | 608 | 44 | 4 | 20-34 | 501 | 530 | 535 | 1660 | 2170 | 750 | 1195 | 1070 |
| 600 | 800 | 813 | 840 | 770 | 718 | 48 | 5 | 20-41 | 602 | 630 | 638 | 1950 | 2570 | 800 | 1455 | 1295 |
| 700 | 900 | 914 | 910 | 840 | 788 | 50 | 5 | 24-41 | 692 | 720 | 738 | 2165 | 2870 | 850 | 2110 | 1830 |
| 800 | 1000 | 965 | 1020 | 950 | 898 | 52 | 5 | 21-41 | 792 | 820 | 840 | 2595 | 3395 | 950 | 2630 | 2390 |
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