National Standard Swing Check Valves
Application of Standards
① Design and manufacture of cast steel swing check valve in accordance with GB/T12236 and GB/T12224
② Design and manufacture of forged steel rotary check valve according to JB/T 7746
③ Inspection and testing shall comply with GB/T 13927 and GB/T 26480.
④ Flange connections comply with the standards JB/T79, HG/T20592, and GB/T9113.
⑤ Welded end: GB/T12224
⑥ butt and socket welding end: JB/T 7746
⑦ Structure length: GB/T12221
⑧ Temperature and pressure rating: GB/T12224
Product specifications
① Main material: carbon steel, stainless steel, alloy steel
② Nominal diameter: DN25 to DN900
③ Pressure range: 1.0MPa~16.0MPa
④ Operating temperature: -29℃~+600℃
⑤ Drive mode: Automatic.
⑥ Scope of application: can be applied to tap water, sewage, construction, food, power, medicine, metallurgy, light textile, energy and other fluid pipelines to prevent medium backflow.
Main Components Material
| Material quality | |||
| Order number | Part name | ||
| Stainless steel | Cast steel | ||
| 1 | Valve body | CF 8 | WCB |
| 2 | Valve clack | CF8 | WCB+13Cr |
| 3 | Nut | A1948 | 45 |
| 4 | Gasket | 304 | 2Cr13 |
| 5 | Rocker arm | CF8 | WCB |
| 6 | Melt | 304 | 2Cr13 |
| 7 | Stud | A193 B8 | A193 B7 |
| 8 | Nut | A1948 | A1942H |
| 9 | Pad | PTFE | Flexible graphite + 304 |
| 10 | Bonnet | CF8 | WCB |
| 11 | Ring | 35 | |
Key Size Measurements
PN1.6-4.0MPa
| Size | DN | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 500 |
| L/L1 | mm | 160 | 180 | 200 | 230 | 290 | 310 | 350 | 400 | 480 | 550 | 650 | 750 | 850 | 950 | 1150 |
| H | mm | - | 150 | 160 | 175 | 185 | 220 | 248 | 276 | 350 | 410 | 430 | 466 | 560 | 618 |
PN6.4MPa
| Size | DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 500 |
| L/L1 | mm | 300 | 340 | 380 | 430 | 500 | 550 | 650 | 775 | 900 | 1025 | 1150 | 1400 |
| H | mm | 192 | 207 | 207 | 235 | 265 | 297 | 357 | 405 | 465 | 514 | 568 | 620 |
PN10.0MPa
| Size | DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| L/L1 | mm | 300 | 340 | 380 | 430 | 500 | 550 | 650 | 775 | 900 |
| H | mm | 210 | 227 | 235 | 274 | 307 | 347 | 402 | 432 | 484 |
PN16.0MPa
| Size | DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 |
| L/L1 | mm | 300 | 340 | 380 | 430 | 500 | 550 | 650 |
| H | mm | 225 | 250 | 270 | 330 | 307 | 428 | 508 |
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