閘閥 · 楔式閘閥（wedge）
雙閘板閘閥
依 API 600 / ASME B16.34 的雙閘板閘閥結構：頂部楔塊將兩片平行閘板撐開壓向兩側閥座面，落座力由閥門自身產生，能承受會使剛性閘板變形的管線負載。DN40 至 DN800，鑄鐵、球墨鑄鐵、碳鋼與不鏽鋼閥體，PTFE 或石墨填料，附至 DN600 的完整 PN10 尺寸表。
屬於 楔式閘閥（wedge） 系列
最後更新： 2026-11
規格
| Valve body material | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
|---|---|
| drain box materials | Cast iron, Ductile Iron |
| Disc Materials | Carbon Steel, Stainless Steel, Brass |
| top wedge materials | Carbon Steel, Stainless Steel, Brass |
| stem nut materials | Ductile iron, Brass |
| Stem material | Cast iron, Ductile iron |
| Bonnet material | Cast Iron, Ductile iron |
| packing | PTFE, Graphite |
| gear actuator materials | Cast Iron, Ductile Iron |
| Nominal valve connection size | DN40 to DN800 |
| Pressure class / nominal rating designation | PN200 to PN500 |
| Design standards | API600, ASME B16.34 |
| Face-to-face dimensional standard | ASME B16.10 |
| buttweld standard | ASME B16.25 |
| Inspection and pressure-test standards | API598 |
應用與選型指引
Pick the double-disc execution over a flexible wedge where seat tightness under external loading matters - waterworks, power plant and large-diameter isolation duty are the classic applications. Body, disc, top wedge, spring and gland materials are separately selectable per the 13-part build list on the page.
常見問題
How does a double-disc gate differ from a solid wedge gate?
Closing drives a top wedge between two parallel discs, pressing each outward onto its own seat face; sealing force comes from the valve mechanism rather than forced interference of one wedge, so tight shutoff holds even when pipeline loads distort the body. The page lists the full 13-part build including dispersing plug and high-intensity spring.
What sizes and materials are covered?
DN40 to DN800 with bodies in cast iron, ductile iron, carbon steel and stainless steel; discs, top wedges and springs in carbon steel, stainless steel or brass; PTFE or graphite packing. Design to API 600 and ASME B16.34, face-to-face to ASME B16.10, butt-weld dimension to ASME B16.25, testing to API 598.
Where is this execution the better pick?
Where positive double-seat shutoff matters more than installed height - the PN10 dimension table runs to DN600 with correspondingly tall bonnets. For steam and thermal-oil duty above these limits, the pressure-seal gate executions are the applicable family instead.
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。