規格
| Valve body material | Duplex Stainless Steel, Super Duplex Stainless Steel, Alloy 20, CN7M, nickel-molybdenum alloy, Carbon Steel, WC6 |
|---|---|
| Disc Materials | Duplex Stainless Steel, Super Duplex Stainless Steel, Alloy 20, CN7M, nickel-molybdenum alloy |
| Trim material | SS304, SS316, SS304L, SS316L, 13%Cr.Steel, cobalt-chromium hardfacing alloy, nickel-molybdenum alloy, Duplex Stainless Steel |
| gland packing | Graphite, PTFE |
| Nominal valve connection size | DN40 to DN600 |
| Pressure class / nominal rating designation | PN16 to PN63, Class 150 to Class 300 |
| End connection types | Flanged, Socketweld, Buttweld |
| Operation / closure mode | Handwheel Operated, Electric Actuated, Pneumatic Actuated |
| Design standards | ANSI B16.34, API 6D, DIN 3840, BS EN 1868 |
| face to face standards | ANSI B16.10, API 6D, DIN3202, BS EN558-1 |
| Flange standards | ANSI B16.5, DIN 2543, BS EN 1092-1 |
| buttweld end standards | ANSI B16.25 |
| Inspection and pressure-test standards | API598, API6D, DIN3230, BS EN 12569 |
應用與選型指引
Select the duplex execution by medium corrosivity and chloride level first, then by class rating and end connection against the piping standard. Disc, trim and gland-packing materials are separately selectable, so specify trim hardness against the media solids, not just the body grade.
常見問題
When is a duplex swing check valve the right choice over CF8M?
When the medium combines corrosion duty with mechanical strength requirements - duplex bodies resist chloride pitting far better than CF8M while keeping higher yield strength. The benchmark page lists duplex, super duplex, Alloy 20, CN7M, nickel-molybdenum alloy, carbon steel and WC6 body options, so the media analysis should drive the material pick.
What sizes and pressure classes does this execution cover?
Nominal size DN40 to DN600 and nominal pressure PN16 to PN63 (Class 150 to Class 300) on the collected page, with a full PN16 face-to-face and height dimension table from DN40 to DN600.
Which standards govern the design and testing?
Design and manufacture to ANSI B16.34, API 6D, DIN 3840 and BS EN 1868; face-to-face to ANSI B16.10, API 6D, DIN3202 and BS EN558-1; flanges to ANSI B16.5, DIN 2543 and BS EN 1092-1; testing to API 598, API 6D, DIN 3230 and BS EN 12569.
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。