系列規格
| Designs | Single Orifice, Double Orifice, Double Orifice Kinetic, Combination |
|---|---|
| Functions | Continuous air release at high points, Air admission during draining (vacuum breaking), Rapid air discharge during filling (kinetic) |
| Nominal valve connection size | 1" to 20" (single body 1"-8", dual body 10"-20") |
| Pressure class / nominal rating designation | PN10, PN16, Class 125 |
| Service temperature range | -20 to 180°C (KXC single release, water/oil/gas) |
| Materials (component scope as published) | WCB (ASTM A216), CF8, CF8M (ASTM A351), F316, F316L (ASTM A182), F51/2205 duplex (ASTM A182), F53, F55/2507 super duplex (ASTM A182), C95400, C95800 aluminium bronze (ASTM B148), nickel-copper alloy 400, nickel-chromium alloy 625 (ASTM B564) |
| Float And Trim | T316 stainless steel floats, stainless steel 316 internal trim, resilient seating, full pipe size inlets/outlets |
| Design standards | AWWA C512 |
| Certifications | NSF 372 Certified Lead-Free, NSF 61 Certified for Drinking Water, Meets AWWA C512 |
| design focus | Air discharge and admission capacity, float response speed and stability, tight sealing under system pressure, fouling resistance, structural integrity under surge |
| awwa c512 types | Air Release, Air/Vacuum, Combination |
| air release sizing rule | Dissolved air approx. 2% by volume; venting capacity q = Q (GPM) x 0.13 cu ft/gal x 0.02 (SCFM) |
| air vacuum sizing differential | 2 psi (14 kPa) standard; up to 5 psi (35 kPa) with slow-closing device |
| vacuum sizing criterion | Admit air at the lower of 5 psi differential or pipe collapse pressure |
| awwa m51 location schedule | High points: combination; long horizontal runs, descents, ascents: valves at 1250-2500 ft (380-760 m) intervals; flow meters: air release upstream; well/vertical turbine pumps: air/vacuum with slow-closing or throttling device |
| anti shock design | Anti-shock air valves (e.g. Vent-O-Mat RBX) are designed so air-discharge closure limits the transient pressure rise to 1.5x rated working pressure, controlling slam/surge on fast-filling lines |
| dynamic floatless design | Floatless dynamic combination air valves (A.R.I. D-070) replace floats with a rolling diaphragm and a small pilot orifice: air discharges through the large orifice, then system pressure acting on the pilot lowers the rolling-diaphragm assembly to seal it — a design aimed at resisting fouling in wastewater service |
| air valve maintenance interval | A.R.I. D-070 IOM: the valve should be maintained at least once a year, in accordance with the quality and composition of the fluid in the system; seals and diaphragm inspected for cracks and tears |
| installation air trap sizing | A.R.I. D-070 IOM installation practice: air-trap riser diameter = pipeline diameter up to 300mm, 60% of diameter up to 1500mm, 35% above; riser up to 150mm; air trap at least 150mm; a manual isolation valve is required under the valve inlet |
| compressed gas hazard | Air release valves — especially wastewater models — may contain a significant volume of compressed gas with accumulated energy; depressurize before servicing |
| working pressure excludes surge | Manufacturer IOM note: the stated maximum working pressure does not include pressure changes caused by water hammer and surge effects — surge analysis is a separate duty check |
| rbx positioning schedule | Vent-O-Mat RBX installation schedule: air valves at system summits and high points, along long horizontal runs and at significant grade changes, downstream of pump discharge / after check valves, and at blank ends; single-chamber anti-shock combination design (PN16/25/40, DN25-200) |
| factory testing | Vent-O-Mat RBX factory tests include hydrostatic pressure tests at 1.5x rated pressure, low-pressure sealing checks, and float/mechanism drop testing on a sampled basis |
範圍與來源備註
| air valve type taxonomy | Vendor catalog tree lists four designs (Single Orifice / Double Orifice / Double Orifice Kinetic / Combination), while AWWA C512-15 standardizes three basic types: Air Release, Air/Vacuum, Combination. 'Double Orifice Kinetic' is vendor vocabulary corresponding to kinetic/air-release designs under the standard taxonomy; reconcile on next taxonomy 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。
常見問題
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。
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。
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。
本系列的類型
類型
單口排氣閥
單口排氣閥經一個小孔口將液體管線中的積存空氣排出：不鏽鋼浮球隨腔內空氣積聚而下降，開啟閥座釋放氣囊，流體回升後浮球上升關閉。產品範圍涵蓋鑄鐵、球墨鑄鐵或不鏽鋼閥體、浮筒、閥蓋與悶蓋，不鏽鋼浮球、閥桿、支架與閥塞，NBR 或 EPDM 墊片，DN40 至 DN200，Class 150 至 Class 300 或 PN1
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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 D
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複合式排氣閥
複合式排氣閥在單一組件中配對氣/真空功能與連續排氣功能：啟動時排放大量空氣、運行中釋放積聚氣囊、洩水時補入空氣以防真空與水擊——潔淨水輸送的標準高點閥，污水幹線則用重載版本。產品範圍涵蓋潔淨水單體組件 1"-8" 與雙體組件 10"-20"（VM-200C/201C/206C 系列，另有單體 SuperValve 變體
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