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Cast Steel Axial Check Valve
| Size | 2"~48" |
| Rating | 150LB~2500LB |
| Body Materials | Carbon Steel, Stainless Steel, Alloy Steel, Duplex S.S. XDSS, etc. |
| Design Standards | API 6D |
| Face to Face Standards | EN558 series 16 / API594 |
| Flange Dimension Standards | ASME B 16.1, ASME B16.47, ASME B16.5 |
| Pressure Test Standards | API598 |
| Quality/Product Certifications | ISO9001, ISO14001, ISO18001 |
| NACE | NACE MR 0103 NACE MR 0175 |
| Shutoff Class | API 598 (Zero Leakage), API 6D |
| End Connection | RF, RTJ |
| NO. | PAPT NAME | MATERIAL-ASTM |  |
| 1 | BODY | ASTM A216 WCB | |
| 2 | SEAT RING | ASTM A105 | |
| 3 | BOLT | ASTM A193 B7 | |
| 4 | O-RING | VITON | |
| 5 | SEAT | ASTM A105 13CR | |
| 6 | DISC | ASTM A216 WCB 13CR | |
| 7 | SPRING | INCONEL X-750 | |
| 8 | BEARING | BRONZE | |
| 9 | NAMEPLATE | SS304 | |
| 10 | RIVET | SS304 |
●Remove the valve from carton or packing skid.
●The protective rust proof coating on the internal parts of steel or cast iron valves should be removed by brushing out with any standard petroleum solvent (Varsol, Kerosene), and air dry. Insure internal parts operate freely.
●Stainless Steel or Bronze valves need only to be wiped clean and installed.
●In horizontal flow installation, the hinge pin must be vertical.
●Insert the valve between two companion flanges of the same series as the valve and place gaskets on flange faces. The arrow on the valve or name plate indicating direction of flow should coincide with line flow. Install studs through companion flanges and tighten, using standard industry practice.
●In liquid service we recommend valve be installed at least five (5) pipe diameters downstream from a pump discharge and/or other pipe fittings for maximum service life. Consult factory.
| TROUBLE | POSSIBLE CAUSES | REMEDY |
| Leakage in the seat | Deposits or dirt in the seating zone | In case of firm incrustation, clean seating zone and valve disc/ring |
| Damage to the coating of the valve disc/ring | Replace valve disc/ring | |
| High head loss | Clogging and seizing of the spring | Clean spring, in case of very dirty medium：provide spring protecting device, |
| Deposits on guiding stem | Open valve manually several times until valve can be operated easily again | |
| Foreign bodies between valve disc/ring and internal body | Manually remove foreign body | |
| Valve blocked | Foreign bodies jammed in the seating zone at v(referred to Dn)<2m/s | Increase flow velocity and flush out foreign bodies |
| Foreign bodies jammed in the seating zone at v(referred to Dn)>2m/s | Manually remove foreign bodies | |
| Increased noise(closing shocks) | Return spring broken | Replacement of spring |
| Deposits in the guding device due to low flow velocity | Cleaning of the bore | |
| Valves installed in a wrong way, contray to the specified direction of installation |
Pump discharges against closed valve. The direction arrow has not been followed during installation. |
Removal of the valve from the pipeline |
