It occurs when fluid in motion is suddenly forced to stop moving, and frequently occurs at pump shutdown.

當運動中的流體突然被迫停止運動時就會發生這種現象，經常發生在泵停機時。

We'll be showing the difference between using a swing check valve.

我們將展示使用旋啟式止回閥的不同之處。

And a spring assisted DFT silent check valve.

還有一個彈簧輔助 DFT 靜音止回閥。

Here you can see the fluid flow upon pump startup.

在這裡，您可以看到泵啟動時的流體流量。

The motion and slamming of the swing check can cause damage to sealing surfaces and fatigue.

擺動止回閥的運動和撞擊會導致密封面損壞和疲勞。

And wear to the hinge pins.

鉸鏈銷也有磨損。

When the pump shuts down, it is gravity and reverse flow that closes or slams the swing check valve closed, resulting in pressure wave build and water hammer.

當水泵關閉時，重力和反向水流會關閉或猛烈撞擊擺動止回閥，從而產生壓力波和水錘。

Water hammer can also damage pipe hangers, instrumentation, and lead to dangerous work environments.

水錘還會損壞管道吊架和儀表，並導致危險的工作環境。

Now you see an Excalibur model DFT spring assisted silent check valve on pump startup.

現在您看到的是泵啟動時的 Excalibur DFT 型彈簧輔助靜音止回閥。

When the pump shuts down, the spring assisted silent check valve closes the head of reverse flow before fluid momentum changes direction, thereby significantly reducing water hammer.

當泵關閉時，彈簧輔助靜音止回閥會在流體動量改變方向之前關閉反向流的揚程，從而顯著減少水錘現象。

Pressure spikes are minimal because the disc closes ahead of the reverse flow.

由於圓盤在反向流動之前關閉，是以壓力峰值很小。

Now you see a side by side comparison of DFT silent check valve and a swing check.

現在您看到的是 DFT 靜音止回閥和旋啟式止回閥的並排比較。

University and independent laboratory studies have shown that the dynamic characteristic of the axial flow, spring assisted silent check valve, DFT check valves favors fast closing ahead of reverse flow.

大學和獨立實驗室的研究表明，軸流式彈簧輔助靜音止回閥、DFT 止回閥的動態特性有利於在反向流動之前快速關閉。

Therefore, reducing pressure spikes and water hammer.

是以，可以減少壓力峰值和水錘。

Specify DFT check valves to replace your unreliable, high maintenance swing check or double door check valve.

指定使用 DFT 止回閥來取代不可靠、維護成本高的旋啟式止回閥或雙開門止回閥。

And to.

還有

Significantly reduce water hammer problems.

大大減少水錘問題。

Visit us online at DFT-valves.com to view our complete selection of inline nozzle style non slam check valves.

請訪問我們的在線網站 DFT-valves.com，查看我們完整的直通式噴嘴型無塞止回閥產品系列。