規格
| Valve body material | Duplex 4A, 5A, Duplex Stainless Steel, Super Duplex Stainless Steel, nickel-molybdenum alloy, Alloy Steel, nickel-copper alloy, nickel-chromium alloy, iron-nickel-chromium alloy, Titanium, Bronze |
|---|---|
| Disc Materials | Stainless Steel, Duplex Stainless Steel, nickel-molybdenum alloy, Titanium |
| Stem material | SS316 |
| Seat material | EPDM, NBR, Viton |
| shaft material | SS316 |
| packing seal | Graphite, PTFE |
| Nominal valve connection size | DN50 to DN200 |
| Pressure class / nominal rating designation | Class 150 to Class 600, PN10 to PN40 |
| End connection types | Wafer |
| Operation / closure mode | Manual, Lever Operated, Electric Actuated, Pneumatic Actuated |
| face to face standards | ANSI B16.10, API 609, MSS-SP-68, ISO 5752 |
| Flange standards | ASME B16.5: Class 150 to Class 2500, JIS: 10K to 20K, DIN: PN10 to PN40 |
應用與選型指引
Use this execution when the line material is duplex and a wafer sandwich body keeps weight and face-to-face down. Seat elastomer follows the medium (EPDM, NBR or Viton per the page); wafer ends mean both pipe sides clamp the body, so the flange ratings to ASME B16.5 / JIS / DIN on the page must match the mating flanges.
常見問題
Why duplex material for a wafer butterfly valve?
Wafer bodies sit inside the pipeline and see the medium continuously; in seawater, brine and chloride-bearing chemical duty a duplex 4A/5A or super-duplex body resists the pitting that attacks ductile iron and standard CF8M. The page also lists nickel-molybdenum alloy, nickel-copper alloy, nickel-chromium alloy, iron-nickel-chromium alloy, titanium and bronze body options.
What sizes and pressure classes does the page cover?
DN50 to DN200 at Class 150 to Class 600 (PN10 to PN40), wafer end connection, manual/lever/electric/pneumatic operation, with a full DN50-DN200 wafer dimension table.
Which seat should I pick?
EPDM, NBR or Viton per the specification block - EPDM for water duty, NBR for oils, Viton for chemicals and higher temperature. The page lists all three as options on the same body; confirm the exact seat-versus-temperature pairing at quotation.
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。