規格
| Valve body material | A105, F22, F304L, F316L |
|---|---|
| Disc Materials | A105, F22, F304L, F316L |
| Stem material | F6, F304, F304L, F316L |
| Bonnet material | A105, F22, F304L, F316L |
| gland flange materials | A105, F22, F304L, F316L |
| stem nut materials | A276 410 |
| handwheel materials | A197 |
| End connection types | Buttweld, Socketweld, Flanged |
| Nominal valve connection size | DN15 to DN50 |
| Pressure class / nominal rating designation | Class 800 to Class 2500 |
| Design standards | API 602, BS 5352, ASME B16.34 |
| Face-to-face dimensional standard | ASME B16.10 |
| socket weld ends | ASME B16.11 |
| screwed ends | ASME B1.20.1 |
| Flange standards | ASME B16.5 |
| Inspection and pressure-test standards | API 598 |
應用與選型指引
Select this execution for small-diameter, high-pressure lines - seal injection, chemical injection, boiler and sampling service - where the bore is too small for cast construction to be economic and the class is too high for standard cast swing checks. Pick the trim (F22 for hot service, F304L/F316L for corrosive media) against the medium, and match the end connection to the piping standard: buttweld and socketweld per ASME B16.11, screwed per ASME B1.20.1, flanged per ASME B16.5.
常見問題
Why forged steel for a check valve instead of cast?
At DN15 to DN50 and Class 800 to Class 2500, a forged A105-family body gives a denser, defect-free pressure boundary; cast bodies at this size carry proportionally thicker walls and harder qualification. The benchmark page lists forged body, disc, bonnet and gland flange in A105, F22, F304L and F316L, so the same forging route covers the pressure boundary end to end.
Which end connections does this execution support?
The benchmark page declares buttweld, socketweld and flanged ends, dimensioned per ASME B16.11 for socketweld, ASME B1.20.1 for screwed, and ASME B16.5 for flanged, with face-to-face per ASME B16.10. Match the connection to the mating pipe class rather than assuming interchangeability.
What information is needed to quote a forged steel swing check valve?
Nominal size within DN15 to DN50, pressure class from Class 800 to Class 2500, body and trim material (A105, F22, F304L or F316L against the medium and temperature), end connection and facing standard. Those points fix the forging route and documentation set in one pass.
訂購與文件
文件
請在詢問時一併說明您需要的文件組合——此結構的常見項目（材質證明、按所列檢驗標準的測試報告、尺寸圖）將於報價時確認並隨附供應。
報價
可直接報價的詢問應說明：公稱口徑與壓力額定、閥體與閥座材質偏好、端部連接、操作方式，以及含溫度的使用介質。本頁的典型值為基準參考範圍；具有約束力的數值於報價時確認。
樣品與供應
供應條件、訂購數量與交期按訂單議定——請在詢問時說明目的地國家與所需時程。
儲存與運輸
閥門儲存時應保護閥座與密封件免受紫外線、臭氧與變形影響，安裝前保留端面保護蓋；彈性體或 PTFE 閥座結構應避免長期戶外存放——閥座材料在陽光直射與冰凍條件下老化最快。