Components and Materials
No. | Name | Material |
1 | Valve Body | Ductile Iron |
2 | Valve Plate | Ductile Iron+EPDM |
3 | Stem Nut | Brass or Bronze |
4 | Stem | 2Gr13 |
5 | Bonnet | Ductile Iron |
6 | Hexagon Socket Bolt | Zinc Plating Carbon Steel or Stainless Steel |
7 | Sealing Ring | EPDM |
8 | Lubricating Gasket | Bronze |
9 | O-Ring | EPDM |
10 | O-Ring | EPDM |
11 | Upper Cap | Ductile Iron |
12 | Cavity Pad | EPDM |
13 | Bolt | Zinc Plating Carbon Steel or Stainless Steel |
14 | Washer | Zinc Plating Carbon Steel or Stainless Steel |
15 | Hand Wheel | Ductile Iron |
16 | Square Cap | Ductile Iron |
Detailed Size of Main Parts
BS5163 British Standard Flanged NRS Gate Valve
Nominal Diameter | Nomial Pressure | Size(mm) | |||||||
DN | inch | PN | φD | φK | L | H | H1 | H2 | φd |
50 | 2 | 10/16 | 165 | 125 | 178 | 441 | 358.5 | 420.5 | 22 |
25 | 165 | 125 | 178 | 441 | 358.5 | 420.5 | 22 | ||
40 | 165 | 125 | 441 | 358.5 | 420.5 | ||||
65 | 2.5 | 10/16 | 185 | 145 | 190 | 452 | 359.5 | 429.5 | 22 |
25 | 185 | 145 | 190 | 452 | 359.5 | 429.5 | 22 | ||
40 | 185 | 145 | 452 | 359.5 | 429.5 | ||||
80 | 3 | 10/16 | 200 | 160 | 203 | 478 | 378 | 462 | 22 |
25 | 200 | 160 | 203 | 478 | 378 | 462 | 22 | ||
40 | 200 | 160 | 478 | 378 | 462 | ||||
100 | 4 | 10/16 | 220 | 180 | 229 | 559.5 | 449.5 | 553 | 24 |
25 | 235 | 190 | 229 | 567 | 449.5 | 553 | 24 | ||
40 | 235 | 190 | 567 | 449.5 | 553 | ||||
125 | 5 | 10/16 | 250 | 210 | 254 | 674.5 | 549.5 | 677 | 28 |
25 | 270 | 220 | 254 | 684.5 | 549.5 | 677 | 28 | ||
40 | 270 | 220 | 684.5 | 549.5 | 677 | ||||
150 | 6 | 10/16 | 285 | 240 | 267 | 734 | 591.5 | 747 | 28 |
25 | 300 | 250 | 267 | 741.5 | 591.5 | 747 | 28 | ||
40 | 300 | 250 | 741.5 | 591.5 | 747 | ||||
200 | 8 | 10 | 360 | 310 | 292 | 915.5 | 735.5 | 938 | 32 |
16 | 340 | 295 | 923 | 735.5 | 938 | ||||
25 | 360 | 310 | 292 | 915.5 | 735.5 | 938 | 32 | ||
40 | 375 | 320 | 923 | 735.5 | 938 | ||||
250 | 10 | 10 | 400 | 350 | 330 | 1100.5 | 900.5 | 1161 | 36 |
16 | 400 | 355 | 1100.5 | 900.5 | 1161 | ||||
25 | 425 | 370 | 330 | 1113 | 900.5 | 1161 | 36 | ||
40 | 450 | 385 | 1125.5 | 900.5 | 1161 | ||||
300 | 12 | 10 | 455 | 400 | 356 | 1273 | 1045.5 | 1353 | 40 |
16 | 455 | 410 | 1273 | 1045.5 | 1353 | ||||
25 | 485 | 430 | 356 | 1288 | 1045.5 | 1353 | 40 | ||
40 | 515 | 450 | 1303 | 1045.5 | 1353 | ||||
350 | 14 | 10 | 505 | 460 | 381 | 1484.5 | 1232 | 1585 | 40 |
16 | 520 | 470 | 1492 | 1232 | 1585 | ||||
400 | 16 | 10 | 565 | 515 | 406 | 1684.5 | 1402 | 1805 | 44 |
16 | 580 | 525 | 1692 | 1402 | 1805 | ||||
450 | 18 | 10 | 615 | 565 | 432 | 1868.5 | 1561 | 2065 | 50 |
16 | 640 | 585 | 1881 | 1561 | 2065 | ||||
500 | 20 | 10 | 670 | 620 | 457 | 2068 | 1733 | 2238 | 50 |
16 | 715 | 650 | 2090.5 | 1733 | 2238 | ||||
600 | 24 | 10 | 780 | 725 | 508 | 2390 | 2000 | 2605 | 50 |
16 | 840 | 770 | 2420 | 2000 | 2605 | ||||
Advantages
The difference of NRS gate valve and OS&Y gate valve
1, The lifting screw of the dark rod gate valve is only rotating and supreme and moving down, the exposed is only a rod, the nut is fixed on the gate, through the rotation of the screw to lift the gate, there is no visible door frame; The lifting screw of the gate valve is exposed, the nut is close to the handwheel and is fixed (neither rotating nor moving axially), and the gate is lifted by rotating the screw. The screw and the gate have only relative rotating motion without relative axial displacement, and the appearance is a gate bracket.
2, The dark rod gate valve can not see the lead screw, and the open rod can see the lead screw.
3. The steering wheel and the valve stem are connected together relatively immovable when the valve stem is switched on and off, and it is opened and closed by turning the valve stem at a fixed point to drive the valve disc up and down the gate. Open stem gate valve is through the stem and steering wheel screw drive to lift or lower the valve disc. To put it simply, the open-stem gate valve is a valve disc connected to the valve stem to do up and down movement, and the steering wheel is always at a fixed point.