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雙口排氣閥
雙口排氣閥在單一閥體內配對大口與小口兩級：大口級在管線注水時排放大量空氣、洩水時補入空氣，小口級排放帶壓下積聚的氣囊——這是在注水與穩態兩種狀態下都保護輸送幹線的組合。產品範圍涵蓋球墨鑄鐵或鑄鐵閥體、閥蓋、壓蓋與頂帽，SS304 浮球、SS420 閥桿與閥桿螺母、NBR 墊片與 SS304 或碳鋼螺栓，DN80 至 DN200，Class 150 至 Class 300 或 PN16 至 PN40，依 DIN 3352 建造，法蘭 DIN 2501，測試 BS 6755。選型取決於管徑、注水與洩水流速，以及壓力等級對 PN/Class 區間。
屬於 排氣閥 系列
最後更新： 2026-11
系列規格
| Nominal valve connection size | DN80 to DN200 |
|---|---|
| Pressure class / nominal rating designation | Class150 to Class300, PN16 to PN40 |
| Design standards | DIN3352 |
| Valve body material | Ductile Iron, Cast Iron |
| Ball material | SS304 |
| Bonnet material | Ductile Iron, Cast Iron |
| gland materials | Ductile Iron, Cast Iron |
| cap top materials | Ductile Iron, Cast Iron |
| washer materials | SS304, Carbon Steel |
| nut materials | SS304, Carbon Steel |
| bolt materials | SS304, Carbon Steel |
| gasket materials | NBR |
| Stem material | SS420 |
| stem nut materials | SS420 |
| Flange standards | DIN2501 |
| Inspection and pressure-test standards | BS6755 |
| aav series | series 851 |
| aav orifice configuration | double orifice, triple action |
| aav design | double orifice, triple action air valves are designed to allow air to rapidly either escape or enter the pipe system when filling or draining, as well as for automatic discharge of accumulated air during normal working conditions. |
| aav aerokinetic design | The unique ‘Aerokinetic’ design allows air to rush out of the system at great speed without forcing the float upwards and closing it prematurely. |
| aav application | Air relief valve for drinking water (not wastewater) and neutral liquids |
| aav max working temperature | 70° C |
| aav model variant | 851/45-001 |
| aav end connections | Flanged |
| aav body material | Ductile iron |
| aav size range | DN50 - DN200 |
| aav pressure rating | PN16 |
| aav trim materials | SS 316 float, float guides and guide ring, A4 bolts |
| aav coating | 300μm coating |
| aav internal parts material | AISI 316 stainless steel |
| aav seal material | WRAS approved EPDM rubber |
| aav coating standard | DIN 3476 part 1 and EN 14901, GSK approved |
| aav features | A clever float design prevents air rushing out of the system from prematurely closing the valve, Large air flow capacity, No moving parts are touching the internal coating, The complete product is approved for drinking water |
| aav size table | 851-050-45-122000, 851-080-45-122000, 851-100-45-122000, 851-150-45-122000, 851-200-45-122000 |
| ddt typology | Double Orifice Air Valves |
| ddt size range | DN 50 - 200 |
| ddt pressure range | PN 10 - 40 |
| ddt body material | EN-JL1040 |
| ddt coating | inside enameled, outside epoxy / inside and outside epoxy |
| ddt application | Automatic air admission and air release of water pipelines in plants, buildings and valve chambers. |
| ddt media | potable water |
| ddt functions | Automatic air admission and release of the pipeline during filling, operational air release and during the emptying process. |
| ddt design features | Compact design with low weight, Large cross-section with maximum air admission and release rates |
| ddt operation | Automatic operational air release via lever with patented self-cleaning during each switching cycle |
| ddt coating options | Internally enamelled, or epoxy coated |
| ddt seawater option | Also available for seawater application |
| dga design | Double orifice air valve that combines both large orifice & small orifice functions within one unit. |
| dga low pressure sealing | Efficient low pressure sealing at 0.2bar. |
| dga size options | 50mm (2”) - 150mm (6”) |
| dga threaded connection | NPT threaded. |
| dga flanged inlet | Flanged inlet with various drillings. |
| dga outlet facility | Screwed outlet facility. |
| dga seal material | Viton rubber. |
| dga float options | Metal float assembly options. |
| dga orifice size | 9.5mm orifice size available. |
| dga options | Inflow / outflow check., Flushing attachment., Drainage boss., Isolating gate valve with or without bevel gearbox., Odour control unit., 25 bar version. |
| dga flange standard | EN 1092-2: 1997 PN16 |
| dga design standard | EN 1074-4 |
| dga application | Wastewater/Sewage |
| dga body test | 1.5 x PN |
| dga seat test | 1.1 x PN |
| dga working pressure | 0.2 - 16 Bar |
| dga working temperature | 0°C - 70°C |
| dga pressure class | PN16 |
| dga size range | DN50-150 |
| dga model | Fig 942 |
| dga model variants | 942 Standard Valve, 942LP Squat type / Low pressure valve, 942HP High pressure PN25 rated valve |
| dga body material | Ductile Iron |
| dga internal materials | 316 Stainless Steel |
| dga o ring material | Nitrile Rubber |
| dga sizing | Up to 200mm 1” outlet valve, Up to 450mm 2” outlet valve, Up to 600mm 3” outlet valve, Up to 900mm 4” outlet valve, Up to 1200mm 6” outlet valve |
| gasket | NBR |
| flanged end dimension | DIN2501 |
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。
常見問題
雙口排氣閥的報價詢問應包含哪些內容？
執行標準與壓力等級、公稱口徑、閥體與閥座材質、介質及溫度、目的地——缺失的資訊會在報價過程中確認。
雙口排氣閥提供哪些口徑與壓力等級？
本頁面尚未公布該閥門經驗證的口徑與壓力等級範圍——適用於您工況的口徑與壓力等級會在報價過程中提出並確認。請在詢問時附上工況條件，選型結果會在報價中說明。
雙口排氣閥提供哪些閥體材質？
本頁面尚未公布該閥門經驗證的閥體材質範圍——適用於您工況的閥體材質會在報價過程中提出並確認。請在詢問時附上工況條件，選型結果會在報價中說明。