規格
| Nominal valve connection size | 1/2" to 42" |
|---|---|
| valve styles | Threaded Style 1/2"-2", Wafer Style 2"-10", Globe Style 2 1/2"-42" |
| closure action | Spring return with short linear stroke, closing prior to flow reversal |
| seating | Precision metal-to-metal seating, Resilient seat available for zero leakage |
| design features | Expanded body for full flow area, Double guided disc to prevent vibration and wear, Fast closure to prevent check valve slam water hammer |
| Certifications | NSF 372 certified lead-free (globe style; wafer style LF and SS trim), NSF 61 certified for drinking water (globe style; wafer style LF and SS trim), FM approved wafer style 2" to 10", FM approved globe style 2 1/2" to 12", Meets MSS-SP 125 |
| spring life | Tested for over 100,000 cycles |
| installation orientation | Any flow direction |
| quality system | ISO 9001 certified quality system |
| model series | 1400A/1800A Silent Check Valve |
| Valve body material | Ductile Iron |
| Trim material | Stainless Steel, Bronze |
| Seat material | Stainless Steel |
| o ring materials | Viton |
應用與選型指引
Select by connection style and line size first: threaded ends for small bore, wafer for squeezing between flanges in 2"-10" lines, globe style where 2 1/2"-42" service or the FM-approved globe range applies. Where drinking-water contact governs, the NSF 372 lead-free and NSF 61 listings narrow the choice to the eligible styles and trims; the spring is tested beyond 100,000 cycles, and installation is permitted in any flow direction.
常見問題
What sizes and connection styles does the 1400A/1800A silent check valve cover?
Three body styles cover the range: threaded connections from 1/2" to 2", wafer bodies from 2" to 10", and globe bodies from 2 1/2" to 42". The wafer style is FM approved from 2" to 10" and the globe style from 2 1/2" to 12".
How does a silent check valve prevent water hammer?
The disc rides on a heavy spring with a short linear stroke, so it reaches the seat before reverse flow can develop. Closing ahead of flow reversal removes the slamming and shock that conventional swing checks produce when the flow stops suddenly.
Which seat and trim options are available?
Precision metal-to-metal seating is standard, with a resilient seat available where zero leakage is required. Wafer styles are offered with lead-free (LF) or stainless steel trim for the NSF-listed drinking-water configurations, and the unit is manufactured under an ISO 9001 certified quality system.
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。