| Product type | Switch valve |
| Product description | Double-plate check valve |
| Model | Hn46H-double-plate check valve |
| Nominal diameter | NPS 2”～48”(DN50～DN1200) |
| Operating temperature | -29℃～593℃(the range of service temperature may vary for different
materials) |
| Nominal pressure | CLASS 150～2500 (PN20～PN420) |
| Material | Main material: A216 WCB,WCC; A217 WC6,WC9,C5,C12,C12A,CA15; A351
CF8,CF8M,CF3,CF3M,CF8C,CN3MN,CK3MCUN,CN7M; A352 LCB,LCC; A494
CW-6MC,CU5MCuC,M35-1；A890 4A(CD3MN),5A(CE3MN),6A(CD3MWCuN); ASME B
148 C95800,C95500, etc. |
| Design standard | API 6D,API 594,ASME B16.34 |
| Structural length | API 6D,API 594 |
| Connecting end | ASME B16.5,ASME B16.47,GB/T 9113 |
| Test standard | API 598,ISO 5208,GB/T 26480,GB/T 13927 |
| Operation method | The valve clack is automatically opened and closed under the medium
force to prevent flowing to another direction. |
| Application fields | For application in fields such as electric power industry,
petroleum refining, petrochemical engineering, offshore oil, tap
water engineering in urban construction, chemical engineering, etc. |
| Other remarks 1 | The sealing faces of valve seat and valve clack are build-up welded
with hard alloy to improve the erosion resistance and extend the
service life of valve. |
| Other remarks 2 | Short closing travel of valve clack, and small impact at valve
closing; short structural length, most suitable for positions with
limited mounting space |
| Other remarks 3 | Suitable for medium backflow prevention in pipeline or device |
| Other remarks 4 | Built-in pin roll, without external leakage point |
| Other remarks 5 | Due to loading of spring, the valve clack can move flexibly without
jamming, and has a good sealing performance. |
