系列規格
| Nominal valve connection size | DN40 to DN2000 |
|---|---|
| Pressure class / nominal rating designation | PN10 to PN63, ANSI Class 150 to Class 1500 |
| End connection types | Wafer, Lug, Flanged |
| Seat leakage class | Resilient seats can often achieve bubble-tight shutoff, typically equivalent to ANSI/FCI Class VI leakage performance; many metal-seated designs target lower leakage classifications such as Class IV. |
| Design standards | API 609, ASME B16.34, MSS SP-67 (where applicable), EN 593, BS 5155 |
| Inspection and pressure-test standards | API 598 |
| Designs | Wafer, Lug, Double Flanged, Double Offset (double eccentric), Triple Offset (triple eccentric), High Performance Wafer/Lug |
| Materials (component scope as published) | WCB (ASTM A216), CF8, CF8M (ASTM A351), F316L (ASTM A182), F51/2205 duplex (ASTM A182), F53, F55/2507 super duplex (ASTM A182), C95400, C95800 aluminium bronze (ASTM B148) |
| offset geometry sealing principle | Concentric designs are position-seated with continuous disc-seat contact; double offset adds a camming action so the disc contacts the seat only in the final 5-7% of closure; triple offset uses a conical inclined sealing geometry where disc and seat engage without rubbing and tight shutoff comes from metal-to-metal wedging, not seat compression |
| seat family tiers | Resilient seats (EPDM/NBR/FKM): bubble-tight shutoff, temperature limited by the elastomer. Polymer seats (PTFE/TFM): near-universal chemical compatibility but cold flow/creep under sustained load. Metal seats (stainless, hard-faced, laminated): zero elastomers, extreme temperature and pressure, torque-seated |
| seat material chemistry windows | EPDM: water, steam, dilute acids and alkalis, ozone — fails (swelling, seal loss) with mineral oil, diesel, gasoline and most hydrocarbons. NBR: oils and fuels, but weak in ozone, sunlight, hot water and steam. PTFE: near-universal chemical inertness, but creeps/cold-flows under sustained load. FKM/Viton: higher temperature plus oils and aggressive fluids, but poorer low-temperature flexibility and unsuitable for some amines, hot water/steam conditions or strong bases |
| seat rating vs body rating | API 609 notes some butterfly valve categories can have seat ratings different from body ratings — never assume body pressure rating equals seat pressure rating |
| potable water approval compound level | Drinking-water approval (WRAS, ACS, WaterMark, NSF/ANSI/CAN 61) attaches to the exact valve, coating and wetted components, not to the material name alone |
| throttling sizing rule | Size a throttling butterfly valve as a control valve: check required Cv at minimum, normal and maximum flow; an oversized valve passes normal flow at a small opening, leaving little useful actuator travel |
| partly open failure chain | Partly-open discs accelerate flow around the edges; in liquid service pressure can fall below vapour pressure causing cavitation (noise, erosion, downstream piping damage); the uneven pressure field creates dynamic torque that may open or close the valve; an actuator sized only for seating and friction may not hold position, causing hunting |
| no universal min opening | No single minimum opening angle applies to every design and service; fixed rules such as 'never below 20 degrees' are useful warnings but not a substitute for sizing — use manufacturer Cv, cavitation and torque data to establish the acceptable operating window |
| flow direction and bidirectionality | Most butterfly valve designs are bidirectional, though some designs have a preferred flow direction; in throttling duty flow direction changes disc loading and seat behaviour |
| seat construction | Molded tongue-and-groove elastomer seat construction is used in hydronic resilient-seat executions: the molded profile lowers operating torque and provides bubble-tight shutoff. |
| lifecycle testing example | Hydronic resilient-seat executions are cycle-tested to 30,000 full strokes and 300,000 repositions and meet ANSI 125 standard. |
| throttling dp guidance | For modulating (throttling) duty the pressure drop across the valve is recommended to be no higher than 29 PSI or sized to match the design pressure drop; 3, 4, 5, and 6 PSI are commonly accepted for modulating applications. |
| hydronic body materials | Cast iron body to ASTM A126 Class A is used in hydronic resilient-seat executions. |
| api609 category a | API 609 Category A covers manufacturer-rated cold working pressure (CWP) valves, usually with a concentric disc and seat configuration, commonly associated with ASME Class 125 or Class 150 flange bolting patterns in NPS 2 through NPS 48. |
| api609 category b | API 609 Category B covers pressure-temperature-rated valves with an offset seat and either eccentric or concentric disc configuration, with size coverage such as NPS 3 through NPS 24 for Classes 150, 300, and 600. |
| face to face series landscape | Butterfly face-to-face dimensions follow standardized series: JIS B 2002 series 46 (double-flanged long pattern) and series 42/1, DIN 3202 F4, EN 558 series 109/110/20/13, ISO 5752 long series, ASME B16.10, BS 5155 short and long, and MSS SP-68 for lug and wafer types, with double-flanged short pattern options. |
相關產品與替代方案
| Interchangeable alternatives | 閘閥 — Low-pressure systems where some leakage is not a major concern |
|---|
互換性與相容性陳述屬包絡層級：所述關係在所示範圍內成立，須於報價時對照工作條件與適用標準確認。
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
蝶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。
蝶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。
蝶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
對夾式蝶閥
對夾式蝶閥夾持於管線法蘭之間，在常見關斷選項中以最短面距、最輕重量實現管線截斷。產品範圍涵蓋不鏽鋼閥體系列 DN50 至 DN2000，PN10 至 PN40 / Class 150，閥體為 SS316L、碳鋼、鑄鐵或球墨鑄鐵，蝶盤自鋁青銅至 SS316，閥桿自 SS410 至鎳銅合金，閥座襯裡為 EPDM/NBR/V
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凸耳式蝶閥
凸耳式蝶閥在閥體周圍設有螺紋凸耳，蝶盤可隔斷管線一側而另一側仍被法蘭封住——這是蝶閥家族中服務於端頭（dead-end）與便於分段拆除的版本。產品範圍涵蓋不鏽鋼系列 DN40 至 DN300，PN10 至 PN40 / Class 150，閥體為 SS316L、碳鋼、鑄鐵或球墨鑄鐵、PTFE 軸套、EPDM/NBR/P
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雙法蘭蝶閥
雙法蘭蝶閥以自身一體法蘭在兩個面均以螺栓接管，因此適用於對夾閥體無法信任承載的埋地、供水與泵站管線。產品範圍涵蓋 DN50 至 DN350，PN10 至 PN16，閥體與蝶盤為 WCB、球墨鑄鐵或 CF8/CF8M/CF3M，閥桿 SS420/SS431、NBR 密封與 RPTFE+石墨軸承，操作為蝸輪或執行器。設計依
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雙偏心蝶閥
雙偏心蝶閥將軸偏離中心線與閥座平面之外，使蝶盤開啟時幾乎立即脫離閥座，相較同心設計摩擦磨損大幅下降。產品範圍涵蓋 DN50 至 DN600，PN10 至 PN63 / Class 150 至 Class 1500，對夾端接，閥體為球墨鑄鐵、WCB 或 SS304/SS316，蝶盤選項至鋁青銅、閥桿 SS410 系列、閥
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三偏心蝶閥
三偏心蝶閥在雙偏心蝶盤上增加第三重錐形幾何，使閥座僅在關閉最後幾度才接觸——金屬對金屬密封、無摩擦，這正是高溫與嚴密關斷隔離所需。產品範圍涵蓋法蘭結構 DN50 至 DN500，PN10 至 PN63 / Class 150 至 Class 1500，閥體、蝶盤、壓蓋與石墨墊片為 ASTM A216 WCB，密封環 S
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同心蝶閥
同心蝶閥保持閥桿居中於蝶盤、蝶盤居中於流道，橡膠密封蝶盤全周均勻受力——低壓公用與一般工業用途中經濟輕量的 1/4 迴轉選擇。產品範圍涵蓋 2" 至 72"（DN 50 至 DN 1800），PN6-PN16（85-232 psi），閥體為球墨鑄鐵、碳鋼、不鏽鋼或青銅，端接有對夾、凸耳與 RF 法蘭，操作為手柄、蝸輪、
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夾套保溫蝶閥
夾套保溫蝶閥使在常溫下會凝固、結晶或變稠的介質保持流動狀態：閥體帶完整加熱夾套，蒸汽、導熱油或熱水在其中循環，使瀝青、硫磺、巧克力、蠟與黏合劑直到蝶盤處都保持液態。口徑範圍、壓力覆蓋、閥體材料與端接在報價時按口徑與結構確認；夾套介質與溫度依製程條件選定。夾套結構按覆蓋度分級：部分夾套經標準法蘭加熱閥體中段，全覆蓋夾套使
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