First, the main purpose of large-caliber electric valve
High and medium pressure flanged gate valve for the nominal pressure PN1.6 ~ 16.0MPa, the working temperature ≤-29℃~ 550℃ of petroleum, chemical, hydraulic, thermal power plant in various systems of pipeline, cut off or connected to the pipeline medium . Suitable media: water, oil, steam, and acid, alkali, ammonia, urea, sulfur and other natural gas. Mode of operation are: manual, gear transmission, electric, pneumatic and so on.
Second, large-diameter electric gate valve application specifications
| Design and manufacture | GB / T12234 | |
|---|---|---|
| Connector size | Structure length | GB / T12221 |
| Flange size | JB79 | |
| Inspection and testing | JB / T9092 | |
| material | Carbon steel | GB / T12229 |
| stainless steel | GB / T12230 | |
| Sign | GB / T12220 | |
| Availability | JB / T7928 | |
Third, large-diameter electric valve structure and characteristics
1, Selection of sophisticated, in line with relevant standards at home and abroad, the overall high-quality materials.
2, In line with the requirements of advanced standards at home and abroad, reliable sealing, excellent performance, handsome in appearance.
3, Advanced and reasonable pairs of seal pair, gate and valve seat sealing surface with different hardness Stellite (Stellite) cobalt-based hardfacing welded together, reliable sealing, high hardness, wear resistance, high temperature resistance, corrosion resistance , Good scratch resistance, long life.
4, The stem by quenching and nitriding surface treatment, good corrosion resistance, scratch resistance and wear resistance.
5, The use of wedge-type flexible gate structure, setting large diameter thrust bearings, friction is small, and with a collision manually, opening and closing easily.
6, Can adopt all kinds of pipe flange standard and flange sealing surface to meet various engineering needs and user requirements.
Fourth, large-diameter electric valve parts and materials and the main purpose
| Body | cap | Valve plate | Seat | Valve stem | filler | Suitable media | Applicable temperature (≤ ℃) |
|---|---|---|---|---|---|---|---|
| WCB | WCB + D507MO | D577 | 2Crl3 | Flexible graphite | Water, oil, steam | 425 | |
| ZGlCr5MO | ZGlCr5M0 + Stellite12 | 1Crl8Ni9 + Stellite6 | 25Cr2M01VA | Flexible graphite | Water, oil, steam | 550 | |
| ZGlCrl8Ni9Ti |
1Crl7Ni2 |
1Crl8Ni9 + Stellite6 | 1Crl8Ni9Ti | PTFE | Nitric acids, bases | 200 | |
| ZG00Crl7Nil4M02 | 316L + Stellite12 | 316L + Stel1ite6 | 316L | PTFE | Urea, Methylammonium solution, Phosphoric acid | 200 | |
Fifth, large-diameter electric gate valve main dimensions
|
Convex flange RF Z940H Z940Y Z940W Z940F Z941H Z941Y Z941W Z941F 16C 16P 16R 16I |
1.6MPa | ||||||||
| DN | L | D | D1 | D2 | b | Z-φd | H | Denso models | |
| 40 | 200 | 145 | 110 | 85 | 16 | 4-φ18 | 595 | DZW10 | |
| 50 | 250 | 160 | 125 | 100 | 16 | 4-φ18 | 653 | DZW10 | |
| 65 | 265 | 180 | 145 | 120 | 18 | 4-φ18 | 665 | DZW10 | |
| 80 | 280 | 195 | 160 | 135 | 20 | 8-φ18 | 725 | DZW15 | |
| 100 | 300 | 215 | 180 | 155 | 20 | 8-φ18 | 787 | DZW20 | |
| 125 | 325 | 245 | 210 | 185 | 22 | 8-φ18 | 934 | DZW20 | |
| 150 | 350 | 280 | 240 | 210 | 24 | 8-φ23 | 955 | DZW20 | |
| 200 | 400 | 335 | 295 | 265 | 26 | 12-φ23 | 1105 | DZW30 | |
| 250 | 450 | 405 | 335 | 320 | 30 | 12-φ25 | 1343 | DZW30 | |
| 300 | 500 | 460 | 410 | 375 | 30 | 12-φ25 | 1516 | DZW45 | |
| 350 | 550 | 520 | 470 | 435 | 34 | 16-φ25 | 1678 | DZW90 | |
| 400 | 600 | 580 | 525 | 485 | 36 | 16-φ30 | 1849 | DZW120 | |
| 450 | 650 | 640 | 585 | 545 | 40 | 20-φ30 | 1937 | DZW120 | |
| 500 | 700 | 705 | 650 | 608 | 44 | 20-φ34 | 2234 | DZW180 | |
| 600 | 800 | 840 | 770 | 718 | 48 | 20-φ41 | 2432 | DZW250 | |
| 700 | 900 | 910 | 840 | 788 | 50 | 24-φ41 | 2489 | DZW250 | |
| 800 | 1000 | 1020 | 950 | 898 | 52 | 24-φ41 | 2643 | DZW350 | |
| 900 | 1100 | 1120 | 1050 | 998 | 54 | 28-φ41 | 2935 | DZW500 | |
| 1000 | 1200 | 1255 | 1170 | 1100 | 56 | 28-φ48 | 3410 | DZW500 | |
| 1200 | 1300 | 1485 | 1390 | 1325 | 58 | 32-φ54 | 3850 | DZW500 | |
