Check VALVES - NRV-Dual-WACHK-SERIES
GENERAL FEATURES
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- Wafer type body to suit ANSI and DIN connection flanges
- Rated to 125/150 class, DIN PN 10 / 16
- Designed to API 594
- Spring loaded dual disc provides even flow operations
- Discs are provided with stoppers to prevent discs from slamming against each other, thus preventing disc damage
- Soft seated design to provide tight shut-off
- Lifting eye bolts for sizes above 150 NB are standard
- Drain connection can be provided as an option on request
- Casted and fabricated options are available
- Pressure testing as per API 598
- Temperature rating: -20°C to 105°C
- Pressure rating: 125/150 Lbs - PN 10/16
Material Specification
| COMPONENT | MATERIAL |
|---|---|
| Body |
CI to IS 210, ASTM A216 WCB, CF8, CF8M, CS to IS 1875-II, SS 304, SS 316, Duplex Steel, Super Duplex Steel |
| Hinge / Stopper Pin | SS 316, Duplex, Super Duplex, SS 410 |
| Discs |
CI to IS 210, SS 304, SS 316, Duplex, Super Duplex Steel, SS 304, SS 316, SS 410 |
| Seat | EPDM (-25°C to 105°C) |
| Spring | SS 316, Duplex Steel |
* Duplex steel disc and pins can be provided only for a minimum order of 10 nos.
Cv Values
| SIZE (NB) | Cv |
|---|---|
| 50 | 48 |
| 65 | 100 |
| 80 | 181 |
| 100 | 291 |
| 125 | 494 |
| 150 | 705 |
| 200 | 1795 |
| 250 | 2563 |
| 300 | 4259 |
| 350 | 5436 |
| 400 | 7355 |
| 450 | 9537 |
| 500 | 12004 |
| 600 | 17804 |
Dimensions
| NB | ASME #150 | ASME #300 | ||||
|---|---|---|---|---|---|---|
| A | B | C | A | B | C | |
| 50 | 60 | 105 | 60 | 60 | 111 | 60 |
| 65 | 60 | 124 | 60 | 60 | 130 | 60 |
| 80 | 73 | 136 | 95 | 73 | 149 | 95 |
| 100 | 73 | 175 | 114 | 73 | 181 | 114 |
| 125 | 83 | 195 | 114 | NA | NA | NA |
| 150 | 99 | 222 | 168 | 98 | 250 | 168 |
| 200 | 127 | 150 | 220 | 127 | 308 | 220 |
| 250 | 146 | 340 | 273 | 146 | 362 | 273 |
| 300 | 181 | 410 | 321 | 181 | 422 | 321 |
| 350 | 184 | 451 | 381 | 222 | 485 | 381 |
| 400 | 190 | 515 | 424 | 232 | 540 | 424 |
| 450 | 203 | 550 | 457 | 263 | 597 | 457 |
| 500 | 219 | 606 | 515 | 292 | 647 | 515 |
| 600 | 222 | 717 | 603 | 317 | 775 | 603 |