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靜音式逆止閥
靜音式逆止閥在倒流加速之前即予阻止：彈簧輔助閥盤以短行程安靜落座，避免傳統旋啟式逆止閥的撞擊與水錘——這正是該型式名稱的由來。美式結構對應 MSS SP-126 鋼製軸向彈簧輔助中心導向逆止閥；歐洲供水結構按 EN 12334 設計，法蘭依 EN 1092，驗收依 EN 12266-1，軸流對夾閥體面距依 API 594。典型壓力覆蓋為 DN50-DN600（2"-24"）PN10-PN40 / ANSI Class 125-300，材質鑄鐵、球墨鑄鐵、WCB 碳鋼或 CF8M 不鏽鋼；端接按具體結構在報價時確認；代表性的球墨鑄鐵水用結構涵蓋 DN50-DN400 PN10/16/25，溫度 -10 C 至 110 C（水/乙二醇）。開啟始於約 0.5 psi 壓差，輕彈簧設計約 1.0 psi 全開，軟閥座提供氣泡級關斷，流線型短行程內件保持低壓損且閥座可快速更換。彈簧關閉使該型式對安裝方向寬容（重力向下流動除外），代價是相較重力斜盤式略有壓損，且閥盤行程有助於甩落閥座異物。選型取決於口徑對管線流速、壓力等級、端接、閥座材料與介質溫度。
屬於 逆止閥 系列
最後更新： 2026-10
系列規格
| Nominal valve connection size | DN50-DN600 (2in-24in) |
|---|---|
| Pressure class / nominal rating designation | PN10-PN40 / ANSI Class 125-300 |
| Valve body material | cast iron, ductile iron, WCB carbon steel, CF8M stainless |
| closing mechanism | Closure is spring-assisted: the spring drives the disc onto the seat before reverse flow can accelerate, which is what removes the slam and water-hammer behaviour of swing, tilting-disc and double-door checks. |
| opening differential | Typical opening behaviour for spring silent checks is a start of opening at roughly 0.5 psi differential with full opening around 1.0 psi, so the valve responds to low forward flow without chattering. |
| cracking pressure by design | Cracking pressure depends on the closing design: gravity-closed tilting-disc checks open near 0.5 psi, while spring-loaded executions typically need about 5 psi, with adjustable springs available on some models. |
| standards mss sp126 | In the US frame, silent check valves are covered by MSS SP-126 for steel in-line spring-assisted centre-guided check valves. |
| standards en frame | In the European water-works frame the same family is designed to EN 12334, with flange drilling to EN 1092 (PN10/16/25); wafer executions follow API 594 face-to-face and DIN-flanged executions MSS SP-125 short-globe face-to-face. |
| API 594 face-to-face applicability note | Wafer-style axial-flow silent checks are dimensioned to API 594 face-to-face so they fit between mating flanges without pipe changes. |
| Test acceptance criteria | Pressure acceptance on the referenced EN executions is seat testing at 1.1 times rated pressure and body testing at 1.5 times, per EN 12266-1. |
| size class envelope | A representative ductile-iron flanged execution covers DN50-DN400 at PN10/16/25; the tenant catalogue band (DN50-DN600, PN10-PN40 / ANSI 125-300) spans multiple OEM envelopes rather than one. |
| temperature envelope | The epoxy-coated ductile-iron water execution is rated for water and glycol mixtures from -10 C to 110 C; higher-temperature service moves to steel bodies and metal seats. |
| Trim material | In the referenced ductile-iron execution the body is GJS-500-7, seat and disc are stainless steel 1.4308, the closing spring is 1.4301, seals are EPDM and internal/external surfaces carry fusion-bonded epoxy coating. |
| seat options | Seat selection spans soft seats for bubble-tight shutoff and metal seats for durability and high temperature tolerance, soft-seat temperature limits follow the elastomer rather than the body. |
| media scope | Spring silent checks serve liquid, gas and steam service; the referenced water-works executions are limited to clean neutral liquids such as water and glycol mixtures. |
| orientation | Installation is flexible across horizontal and vertical lines; the spring, not gravity, returns the disc, so orientation does not change closing behaviour. |
| orientation limit | The one orientation caveat is gravity: on vertical lines with upward flow spring checks work in any orientation, but a check valve cannot close reliably against downward gravity flow. |
| head loss design | Head loss is controlled by a streamlined internal contour plus a light disc on a short stroke, and the same fast-closing spring design is what mitigates slamming. |
| spring drag dp | The spring adds a modest pressure-drop penalty compared with a gravity tilting disc, which is the trade for predictable spring-determined closure timing. |
| self cleaning | Disc travel under spring action helps dislodge debris from the seat area, so spring checks tolerate moderate solids better than gravity-tilted designs. |
| maintainability | The seat is designed for quick trim replacement in line, reducing turnaround when the seat erodes. |
| compact wafer savings | Wafer-body silent checks sandwich between standard flanges and save up to roughly 80 percent of the space and weight of a flanged swing check, cutting support load on large lines. |
| outlet butterfly mounting | On sizes up to and including DN200 the referenced design allows a butterfly valve to be mounted directly at the silent check valve outlet without adapter pieces. |
| peer threaded style sizes | Threaded Style available in sizes 1/2"-2" |
| peer wafer style sizes | Wafer Style available in sizes 2"-10" |
| peer globe style sizes | Globe Style available in sizes 2 1/2 ”- 42” |
| peer clean water scope | Ideal for clean water service - contact factory for other service |
| peer lead free certification | NSF 372 Certified Lead-Free - Globe Style |
| peer drinking water certification | NSF 61 Certified for Drinking Water - Globe Style |
| peer fm approval wafer | FM Approved Wafer Style - 2" to 10" |
| peer mss sp125 conformance | Meets MSS-SP 125 |
| peer seating construction | Precision metal-to-metal seating |
| peer disc guidance | Double guided disc - prevents vibrations and wear |
| peer resilient seat option | Resilient Seat - available for zero leakage |
| peer spring cycle rating | Heavy Duty Spring is tested for over 100,000 cycles |
| peer center guided design | center guided single disc and stainless to stainless seating with special stainless steel spring control to insure positive, noiseless opening and closing. |
| peer flange class fit | Rated to both 125 lb. And 250 lb. Flange class |
| peer activation dp | Activated at 1/4 to 1/2 psi |
| peer flow area design | Designed with larger-than-pipe-size flow area for low pressure loss with maximum efficiency. |
| peer service liquid only | Intended for liquid service only. |
| peer bolt circle fit | Fits both 250# Class bolt circle and 125# Class bolt circle. |
| peer globe style size range | Made in fourteen standard sizes: 2-1/2′′ through 30′′ |
| peer butterfly mating execution | 2-1/2′′ through 10′′ valves mate to wafer-style butterfly valves without use of spool pieces or other adapters. |
| peer companion flange drilling | Specify drillings to meet either 125/150 lb. or 250/300 lb. companion flanges. |
| peer spring closure sequence | When the pump stops and the flow ceases, the force of the spring will automatically close the disc prior to flow reversal. This creates a positive shutoff against flow reversal and minimizes system surges and water hammer. |
| peer disc opening trigger | When the pump starts and the downstream flow creates the required pressure drop in the forward direction, the disc will automatically open. |
範圍與來源備註
| cracking pressure | Cracking pressure: DFT states its silent checks start opening at ~0.5 psi differential (full open ~1.0 psi), while the industry-reference tilting-disc frame lists ~5 psi for spring-loaded executions - opening threshold depends on spring sizing and design family, not a single industry value. |
|---|---|
| face to face framing | Face-to-face framing: wafer axial-flow executions follow API 594 while the referenced EN ductile-iron execution follows MSS SP-125 short-globe dimensions - standard depends on body execution, not on the silent-check type. |
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
靜音式逆止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。
靜音式逆止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。
靜音式逆止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。
請求靜音式逆止閥報價
在此提交需求——可直接報價的詢問應說明適用標準與等級、口徑、材質、介質、溫度與目的地.
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