逆止閥 · 雙瓣逆止閥（dual plate）
橡膠襯裡雙瓣逆止閥
橡膠襯裡雙瓣逆止閥是雙瓣原理的彈性密封版本：兩片彈簧輔助半閥瓣在 EPDM 密封面上關閉。基準結構涵蓋 DN50 至 DN300，PN6/10/16，球墨鑄鐵閥體，不鏽鋼加 EPDM 密封，不鏽鋼 304 閥桿，法蘭依 DIN 2501 PN6/10/16 與 BS 5155，額定 -20 至 120 C，適用水與中性液體。
屬於 雙瓣逆止閥（dual plate） 系列
最後更新： 2026-11
規格
| Nominal valve connection size | DN50 to DN300 |
|---|---|
| Pressure class / nominal rating designation | PN6/10/16 |
| Design standards | DIN 2501 PN6/10/16, BS 5155 |
| Valve body material | Ductile Iron |
| Seal material | Stainless Steel + EPDM |
| Stem material | Stainless Steel 304 |
| medium | Water and neutral liquids |
| Service temperature range | -20 to 120 C |
應用與選型指引
Specify this execution where fast, low-crack-pressure non-return duty on water or neutral liquids needs the elastomer sealing edge - typical of water works, HVAC and general process lines. Set PN6, PN10 or PN16 to the line class, keep the medium within water and neutral liquids (elastomer seats are not for hydrocarbons), and match the DIN flanging to the pipe standard.
常見問題
What does the rubber lining change on a dual plate check valve?
The sealing interface: the plates close on a stainless-steel-plus-EPDM seat, which seals tightly at low pressures and tolerates particles better than metal-to-metal seats. The benchmark page pairs it with a ductile iron body and stainless 304 stem for water and neutral liquids from -20 to 120 C.
Why dual plates instead of a single swing disc?
Two shorter plates travel half the distance and shut faster on flow reversal, with a slim wafer length and low cracking pressure. The benchmark execution covers DN50 to DN300 at PN6/10/16 in that form.
What information is needed to quote one?
Nominal size within DN50 to DN300, line pressure class (PN6/10/16), the medium - the EPDM-based seat limits this execution to water and neutral liquids - and the working temperature against -20 to 120 C.
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。