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水擊預測閥
水擊預測閥是先導控制的膜片閥，在壓力上升瞬變時開啟，將水擊洩放大氣或回流管線，使其無法累積——保護僅靠慢關閉逆止閥不足以防護的長距離泵送幹線。規格為 DN 50 至 DN 600，PN 10/16/25/40，閥體與閥蓋為球墨鑄鐵、不鏽鋼或青銅，內件（閥盤、閥座、導向件、閥桿、螺母、彈簧）為不鏽鋼或青銅，密封 NBR/EPDM/HNBR，膜片為尼龍增強 EPDM，設計依 EN 1074-5 / BS EN 1567，測試依 ISO 5208 / EN 12266-1，面距依 EN 558-1 / ISO 5752，法蘭鑽孔依 EN 1092-2 / ISO 7005-2 / ANSI / JIS / AS 2129。選型取決於預期瞬變幅度對洩放能力、先導設定對正常管線壓力，以及法蘭標準對幹線的匹配。
屬於 減壓閥 系列
最後更新： 2026-11
系列規格
| Nominal valve connection size | DN50 to DN600 |
|---|---|
| Pressure class / nominal rating designation | PN10, PN16, PN25, PN40 |
| Valve body material | Ductile Iron, Cast Stainless Steel, Bronze |
| Seat material | Stainless Steel, Bronze |
| Design standards | EN1074-5, BS EN1567 |
| Inspection and pressure-test standards | ISO5208, EN12266-1 |
| cover materials | Ductile Iron, Cast Stainless Steel, Bronze |
| Trim material | Stainless Steel, Bronze |
| Seal material | NBR, EPDM, HNBR |
| diaphragm material | Nylon Reinforced EPDM Rubber |
| connection standards | EN558-1, ISO5752 |
| flange drilling | EN1092-2, ISO7005-2, ANSI, JIS, AS2129 |
| gaA size range | 3 in to 20 in |
| gaA service media | Water |
| gaA pressure class | Class 125, Class 250 |
| gaA body styles | Angle, Globe |
| gaA body materials | Cast Iron, ASTM A126 Class B |
| gaA cover materials | Steel, ASTM A36 |
| gaA trim materials | Lead-free Bronze |
| gaA seat materials | Buna-N |
| gaA fastener materials | Internal: Stainless Steel, External: Steel, A307, Zinc Plated (Optional 316 Stainless Steel) |
| gaA pilot system materials | Lead Free Brass, Bronze or Copper |
| gaA control panel | Electronic surge anticipation control panel in NEMA 4X enclosure with touch screen display |
| gaA coating | Internal and External NSF-61 Certified Epoxy |
| gaA operation | Electronic control panel senses pump or power failure and immediately opens the main valve in anticipation of the high-pressure surge; returning surge discharged to atmosphere through the fully open valve, then the valve slowly closes |
| roA operation | High pressure pilot opens on overpressure; low pressure pilot in parallel anticipates a surge wave and opens on unusual pressure drop; purely hydraulic, no electrical power |
| roA body styles | Globe (inline), Angle (90 degree) |
| roA seat design | Single full-ported seat, seat bore equal to size of valve; minimum piston travel equal to 25% of seat diameter |
| roA piston guidance | Piston guided above and below the seat a distance no less than 75% of seat diameter |
| roA packing materials | Leather (or other soft material) |
| roA body materials | Gray Iron, ASTM A126 Class B |
| roA trim materials | Bronze, ASTM B-584, Stainless Steel, ASTM A-743 Grade CF-8 or CF-8M |
| roA control piping | Rigid red brass, no less than 0.5 in diameter |
| roA coating | NSF Certified Epoxy per ANSI/NSF Std. 61, AWWA D102 Inside System No. 1 |
| roA testing | Hydrostatic up to two times working pressure (maximum 500 psi testing pressure), tight seating test, performance test for simulated field conditions |
| roA flange standards | ANSI |
| roA pilot system | Pilot valves with range of adjustment, speed control valve, external strainer with blow-off, isolation valves, associated rigid brass piping and fittings, factory assembled |
| roB service media | Wastewater |
| roB operation | Opens quickly when inlet pressure exceeds spring setting, closes slowly via adjustable dampening device; electrical control circuit uses a low pressure signal to open the valve in anticipation of water hammer surges |
| roB seat materials | Grade 300 series stainless steel seat ring held by grade 300 series stainless steel fasteners; grade 300 series stainless steel seat support assembly |
| roB seal materials | Resilient seat packing, Buna o-ring seals |
| roB pilot system | Solenoid pilot valve, pressure transducer, control panel, auxiliary pressure supply |
| roB wear protection | Mechanical scraper ring protecting internal seals |
| cvA size range | 3 in to 48 in (ductile iron body), 3 in to 16 in (cast steel body), 3 in to 16 in (bronze body) |
| cvA body materials | Ductile Iron, Cast Steel, Bronze |
| cvA pressure class | Ductile Iron, ANSI B16.42 flanged: 250 psi (150 Class), 400 psi (300 Class), Cast Steel, ANSI B16.5 flanged: 285 psi (150 Class), 400 psi (300 Class), Bronze, ANSI B16.24 flanged: 225 psi (150 Class), 400 psi (300 Class) |
| cvA flange standards | ANSI B16.42 (ductile iron), ANSI B16.5 (cast steel), ANSI B16.24 (bronze) |
| cvA disc materials | Cast Iron, Cast Steel, Bronze |
| cvA trim materials | Bronze is Standard, Stainless Steel is Optional |
| cvA seat materials | Buna-N Rubber |
| cvA diaphragm material | Nylon Reinforced Buna-N Rubber |
| cvA stem materials | Stainless Steel |
| cvA design | Pilot-operated diaphragm main valve; opens on the initial low pressure wave diverting the returning high pressure wave, then closes slowly without generating further pressure surges |
| cvA function | Surge anticipation on pump power failure plus standard over pressure relief |
| cvA installation | Discharges to atmosphere from a tee in the pump discharge header |
| cvA sensing line | Remote pressure sensing line 3/4 in minimum I.D. installed with a 2 degree slope from the valve to the pipeline to avoid air pockets |
| disc retainer | Ductile Iron, Stainless Steel, Bronze |
| diaphragm washer | Ductile Iron, Stainless Steel, Bronze |
| Disc Materials | Stainless Steel, Bronze |
| guide materials | Stainless Steel, Bronze |
| diaphragm | Nylon Reinforced EPDM Rubber |
| Stem material | Stainless Steel |
| nut materials | Stainless Steel |
| spring materials | Stainless Steel |
| Connection (source-defined) | EN558-1, ISO5752 |
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
水擊預測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。
水擊預測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。
水擊預測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。