China Marine Cast Steel 20K Screw Down Check Globe Valve JIS F7473:
Marine Screw Down Check Globe Valve is called marine SDNR valve for short, also can be called marine screw down non-return valve, stop check valve, is used to shut off/turn on the medium and adjust the flow rate, suitable for the steam, air, fuel oi, lubrication oil, fresh water and water supply lines in ships.
Technical Specification:
1.Design & Manufacturing Standard: JIS F7473-1996
2. Inspection & Test Standard: JIS 7400-1996
3. Watertight Test Pressure: Body- 5.10Mpa, Seat-3.74Mpa~1.0Mpa
4. Flange Standard: JIS B2220 - 20K
Max Working Pressure:
| Fluid Condition | Max Working Pressure（Mpa) |
| Steam of 400℃ | 2.3 |
| Steam of 350℃ | 2.6 |
| Steam of 300℃ | 2.9 |
| Steam of 200℃ or less | 3.1 |
| Air,gas,oil and pulsation water | 3.1 |
| Non-shock water of 120℃ or less | 3.4 |
Main Material:
Body: Cast Steel
Bonnet: Cast Steel
Packing Gland: Stainless Steel
Stem: C3771BD (Brass) or SUS403
Seat: Bronze (BC6) or Stainless Steel (2Cr13, SCS2)
Disc: Bronze (BC6) or Stainless Steel (2Cr13, SCS2)
Gasket: non-asbestos
Main Size List(mm):
| IMPA CODE | Size | L | D | C | No of Bolt Hole | h | t | H | D2 | Weight(kgs) |
| 751231 | 32 | 190 | 135 | 100 | 4 | 19 | 18 | 270 | 160 | 14.4 |
| 751232 | 40 | 200 | 140 | 105 | 4 | 19 | 18 | 190 | 160 | 16 |
| 751233 | 50 | 230 | 155 | 120 | 8 | 19 | 18 | 305 | 200 | 21.6 |
| 751234 | 65 | 270 | 175 | 140 | 8 | 19 | 20 | 345 | 224 | 30.4 |
| 751235 | 80 | 300 | 200 | 160 | 8 | 23 | 22 | 385 | 250 | 43.5 |
| 751236 | 100 | 350 | 225 | 182 | 8 | 23 | 24 | 440 | 280 | 62.3 |
| 751237 | 125 | 430 | 270 | 225 | 8 | 25 | 26 | 500 | 315 | 94.8 |
| 751238 | 150 | 500 | 305 | 260 | 12 | 25 | 28 | 550 | 355 | 132 |
| 750439 | 200 | 560 | 350 | 305 | 12 | 25 | 30 | 630 | 450 | 204 |
| 750440 | 250 | 660 | 430 | 380 | 12 | 27 | 34 | 725 | 560 | 336 |