逆止閥 · 雙瓣逆止閥（dual plate）
蝶型逆止閥
蝶型逆止閥是緊湊對夾雙瓣版本：兩片半圓閥瓣跨流道彈性關閉，在足以夾於法蘭之間的短閥體內完成止回任務。基準結構涵蓋 2 至 24 吋（DN50 至 DN600），PN10/16 與 Class 125，閥體選項 A105、304 與 316，不鏽鋼密封與不鏽鋼 304 閥桿，額定 -20 至 200 C，適用水、廢水與油。
屬於 雙瓣逆止閥（dual plate） 系列
最後更新： 2026-11
規格
| Nominal valve connection size | 2 to 24 inch (DN50 to DN600) |
|---|---|
| Pressure Rating | PN10/16, Class 125 |
| Design standards | DIN 2501 PN6/10/16, BS 5155 |
| Valve body material | A105, 304, 316 |
| Seal material | Stainless Steel |
| Stem material | Stainless Steel 304 |
| medium | Water, Waste Water, Oil |
| Service temperature range | -20 to 200 C |
應用與選型指引
Choose the butterfly-type form where face-to-face length and weight matter - wafer dual-plate bodies fit between standard flanges with no extra room. Pick the body material (A105 for hydrocarbon service, 304 or 316 where corrosion resistance governs) against the medium, set PN10/16 or Class 125 to the line rating, and confirm the -20 to 200 C window.
常見問題
Is a butterfly type check valve the same as a butterfly valve?
No - only the disc motion is similar. A butterfly type check valve is a non-return device: its plates are closed by springs and opened by flow, and the body is wafer-short for sandwich mounting. The benchmark execution covers 2 to 24 inch at PN10/16 and Class 125.
Which body material should I pick?
The benchmark page lists A105, 304 and 316 bodies. A105 forged carbon steel suits hydrocarbon and higher-pressure duty; 304 and 316 stainless serve corrosive water duties. Match the choice to the medium and temperature within the -20 to 200 C range.
What information is needed to quote one?
Nominal size within 2 to 24 inch (DN50 to DN600), line rating (PN10/16 or Class 125), body material preference and the medium. Those four points fix the wafer execution 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。