The NIBCO® wafer style silent check valve is spring actuated with renewable bronze seat and disc. The spring return reduces noise for quiet operation.The NIBCO® wafer style silent check valve is spring actuated with renewable bronze seat and disc. The spring return reduces noise for quiet operation.Check valves prevent backflow by automatically closing when fluid reverses direction. The check valve is recommended for commercial and industrial water applications.The NIBCO® cast iron sliding disc check valve is wafer style to fit between standard flanges. Wafer checks may be installed in horizontal positions (or vertical with flow moving up). Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information.
OVERVIEW
Class 125 is rated 200 psi/13.8 bar non-shock cold working pressure Max temperature 200°F/ 93°C Stainless steel trim Spring actuated (1/2 psi cracking pressure) Class 125 wafer end connections Use in U.S. drinking water applications is prohibited after January 3, 2014 Conforms to MSS SP-125 FM approved Size range 2″ to 10″
| Size | A | B | Weights | ||||
| In. | mm. | In. | mm. | In. | mm. | Lbs. | Kg. |
| *2 | 50 | 4.25 | 108 | 2.63 | 67 | 6 | 5 |
| * 2 1/2 | 65 | 5 | 127 | 2.88 | 73 | 7 | 3 |
| *3 | 80 | 5.75 | 146 | 3.13 | 79 | 12 | 5 |
| *4 | 100 | 7 | 178 | 4 | 102 | 18 | 8 |
| *5 | 125 | 8.38 | 213 | 4.63 | 114 | 27 | 12 |
| *6 | 150 | 9.75 | 248 | 5.5 | 140 | 42 | 19 |
| 8 | 200 | 13.38 | 340 | 6.5 | 165 | ᵼ 85 | 39 |
| 10 | 250 | 16 | 406 | 8.25 | 210 | ᵼ 146 | 66 |
| Part | SPECIFICATION |
| 1. Body | Cast Iron ASTM 126 Class B |
| 2. Seat | Bronze ASTM B 584 Alloy C83600 (B) |
| 2a. Seat | Buna-N Bonded to Bronze (W) |
| 3. Disc | Bronze ASTM B 584 Alloy C83600 |
| 4. Spring | Stainless Steel Type 316 ASTM A 313 |
| 5. Bushing | ASTM B 16 |
| 6. Set Screws | Stainless Steel Type 304 ASTM F 879 |
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