系列規格
| Designs | Cast Iron Diaphragm Valve, Ductile Iron Diaphragm Valve |
|---|---|
| Nominal valve connection size | DN15 to DN300 |
| Pressure class / nominal rating designation | PN10/PN16 (DIN), PN6 to PN16, Class 150 (ANSI) |
| Service temperature range | -20 to 250°C (PTFE-lined weir and straight-through) |
| Materials (component scope as published) | Cast iron (ASTM A126), Ductile iron (ASTM A536), WCB (ASTM A216), LCB (ASTM A352), CF8, CF8M (ASTM A351), F316/F316L (ASTM A182), F51/2205 duplex (ASTM A182), WC6, WC9 alloy (ASTM A217) |
| Diaphragm Material Temperatures | EPDM: -30 to +300 F; excellent water/steam/dilute acids-alkalis; poor oil resistance; intermittent steam sterilization, Neoprene: -20 to +200 F; wastewater, mildly acidic/alkaline media, entrained oils, Soft natural rubber: -30 to +180 F; best abrasion resistance for abrasive slurries, Viton (FKM): -20 to +300 F; oils, mineral acids, salt solutions, chlorinated hydrocarbons; not ammonia or polar solvents, TFE (Teflon)-faced / EPDM backing: -30 to +300 F; most chemical resistant; greater closing force, shorter working life, Butyl (IIR): -20 to +250 F; very low gas permeability — vacuum and gas service; dilute mineral acids, alkalis, water |
| Body Linings Available | Hard rubber / graphite-filled hard rubber (to 250 F), EPDM, Neoprene, Buna-N (to 275 F), Butyl, Chlorobutyl (to 180 F), Fluoropolymers: PTFE, PFA, FEP, PVDF, ETFE, ECTFE (to 350 F), Glass, polypropylene, polyurethane, PVC |
| Diaphragm Selection Factors | Temperature limits, Chemical resistance, Flexibility, Fatigue life |
| Design standards | BS 5156, BS 6755, ASME B16.5, BS 4505, EN 1092 |
| design focus | Diaphragm fatigue life, uniform seating, chemical resistance, throttling stability, ease of diaphragm replacement |
| weir vs straight through pressure | Weir type: higher operating pressures, best for throttling duty, Straight-through: lower pressure rating, full bore, for high-solids and viscous media |
| hermetic isolation | Only two components contact the operating medium — the shut-off diaphragm and the valve body; actuator and medium are hermetically separated, so no stem seal/gland packing is required |
| weir design function | Weir seats the diaphragm with a compressible meniscus pad that minimizes cavitation and noise; best throttling control in the family with a higher flow coefficient; mountable in any position |
| diaphragm body materials | Cast iron ASTM A-126 Class B, Ductile iron ASTM A-536 Grade 65-45-12, Cast steel ASTM A216 Gr WCB, 316 stainless ASTM A-351 CF8M, Alloy 20 ASTM A-351 CN-7M |
| weir buildup limitation | Weir recesses trap media against the diaphragm ("dead stops created from the build-up of media getting stuck around its diaphragm") — solidifying or crystallising media can delay shut-off; straight-through bore avoids this |
| diaphragm replacement interval | Typical maintenance guidance, not a fixed service life: the diaphragm is the wear component, and replacing rubber diaphragms roughly every 2-3 years and PTFE diaphragms every 4-5 years extends valve life beyond leaving the diaphragm to fail in service — actual life depends on cycling frequency, medium, temperature and duty, so treat the intervals as inspection anchors |
| hygienic diaphragm grades | Hygienic/pharma builds use USP Class VI and FDA-compliant EPDM, FPM, and PTFE diaphragms; elastomer and PTFE diaphragms are interchangeable on the same actuator, in hygienic sizes around DN10-100 |
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
隔膜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。
隔膜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。
隔膜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
鑄鐵隔膜閥
鑄鐵隔膜閥以柔性隔膜壓向堰脊（weir）來隔斷或節流公用流體，使濕潤金屬件不接觸介質——閥體僅支撐真正接觸流體的襯裡與彈性體。產品範圍涵蓋鑄鐵、球墨鑄鐵或 WCB 閥體與閥盤，NBR 或 EPDM 襯裡與隔膜，DN15 至 DN250，PN6 至 PN16 或 Class 150，法蘭端接，操作為手動、電動或氣動，依
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球墨鑄鐵隔膜閥
球墨鑄鐵隔膜閥在相同的堰式密封概念背後提供更高強度的閥體：柔性隔膜與閥體堰脊接觸，由彈性體與襯裡——而非承壓殼——承載介質。產品範圍涵蓋球墨鑄鐵、鑄鐵或 WCB 閥體與閥盤，NBR 或 EPDM 襯裡與隔膜，DN15 至 DN250，PN6 至 PN16 或 Class 150，法蘭端接，操作為手動、電動或氣動，依 B
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堰式隔膜閥
堰式隔膜閥將柔性隔膜壓向閥體內建的凸起堰脊密封，短行程與受支撐的隔膜適合節流以及會堵塞其他閥型的腐蝕性、磨蝕性或含固介質。產品範圍涵蓋 DN15 至 DN300，PN10/PN16，閥體為球墨鑄鐵 GGG50、密封組件為球墨鑄鐵+PTFE、閥桿 304 不鏽鋼，設計依 EN 593 / DIN 3202 F4、法蘭依
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直通式隔膜閥
直通式隔膜閥使流動路徑通過近乎筆直、無阻礙的孔道，柔性隔膜向下壓閉該孔道，因此黏性介質、漿料與懸浮固體通過時滯留最少——此布局有利於排空以及不願滯留於堰槽中的介質。產品範圍涵蓋 DN15 至 DN300，PN10/PN16，閥體為球墨鑄鐵 GGG50、密封組件為球墨鑄鐵+EPDM、閥桿 304 不鏽鋼，設計依 EN 5
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