Stainless Steel Flanged Check Valve – Swing Type, 2″–4″, Class 150 / JIS 10K

產品說明

這款 304 法蘭式止回閥是一款適用於 2″、3″ 及 4″ 法蘭管線的鉸鏈式止回閥。其鉸鏈式閥盤在正向流動時會擺動開啟，當流量停止或逆向時則會落下關閉——無需動力，亦無需操作人員。 閥體、閥盤、閥臂及閥蓋均採用 304 不鏽鋼（CF8）鑄造而成，亦可依訂單需求提供 CF8M（鑄造 316）版本，並以 PTFE 墊片密封。.

每種尺寸均提供兩種法蘭標準： ASME B16.5 150 級 適用於美規管路，或 JIS B2220 10K 適用於亞洲規格的工廠。產線規模較小？我們的 螺紋式擺動止回閥 適用範圍為 1/2 英吋至 3 英吋，該 一體式靜音止回閥 適用於 1/2 英吋至 2 英吋，或瀏覽全部商品 不鏽鋼止回閥.

款式與尺寸

Class 150 還是 JIS 10K —— 該選用哪種法蘭？

The two standards are not interchangeable. At 3 inch the Class 150 flange has 4 bolt holes and the JIS 10K flange has 8, and at 4 inch the bolt circles are 190.5 mm and 175 mm, so neither size lines up in the normal installed position. At 2 inch the bolt circles (120.5 and 120 mm) and the four 19 mm holes nearly match, but the flange diameter and raised face still differ, so the joint matches neither standard. Choose by the standard your piping already uses: ASME B16.5 Class 150 is the norm in US-spec plants, JIS B2220 10K in Japanese- and much Asian-spec equipment. If you are not sure, tell us when you request a quote — the face-to-face length is identical for both (203, 241 and 292 mm for 2, 3 and 4 inch), so the choice never affects your pipe layout.

主要技術規格

應用

• Pump discharge lines — stops backflow and reverse rotation when the pump shuts down.
• 水處理 and distribution mains, 2″–4″ — the service that AWWA C508 swing check valves are written for.
• Wastewater lift stations — force-main protection on screened wastewater (not sludge or slurry).
• Chemical and petrochemical process piping — general one-way flow protection (not dosing-pump service).
• HVAC chilled-water and condenser-water pumps — in commercial building mechanical rooms.
• Cooling-tower and heat-exchanger loops — cooling-water circulation in industrial plants.
• General plant water piping — power and pulp-and-paper plants (not boiler feed).

Flanged ends let the valve be unbolted for inspection or cleaning without cutting the line. For threaded lines, see the 不鏽鋼擺動式止回閥.

常見問題

Class 150 和 JIS 10K 法蘭可以互換使用嗎？ No. At 3 and 4 inch the bolt count or bolt circle differs, so a Class 150 valve will not bolt onto JIS 10K counter-flanges in the normal position. At 2 inch the bolt holes nearly line up, but the flange diameter and raised face still differ, so the joint matches neither standard. Match the valve to the flange standard your piping already uses — we stock both for every size.

有哪些尺寸可供選擇？ 共有三種型號：C-2F 為 2 英吋、C-3F 為 3 英吋，C-4F 為 4 英吋，每種型號均配備 ASME 150 級或 JIS 10K 法蘭。關於 1/2 英吋至 3 英吋的螺紋管線，請參閱我們的 螺紋式擺動止回閥.

閥門是由什麼材料製成的？ 本體、碟片、臂和蓋均由 304 不鏽鋼（CF8）鑄造而成，並配有 PTFE 墊片——現貨供應。針對含氯化物或更具腐蝕性的介質，可接受訂製 316（CF8M）鑄造版本。.

擺動機構是如何運作的？ 該閥盤懸掛於閥體內部的鉸接臂上。當流體向前流動時，會將閥盤推開；當流體停止或逆流時，閥盤會擺回閥座，並自動阻斷逆流——無需動力或人工操作。.

我該去哪裡查看尺寸？ 每種型號和法蘭標準皆有專屬的尺寸表——請從本頁頂端的卡片下載 PDF 檔案。其中包含組裝圖、法蘭尺寸及面對面長度。.

最低訂購量是多少？ 無最低訂購量限制——我們接受任何規模的訂單，包括小批量試購訂單。小批量訂單的運費由買方安排並支付。付款方式為電匯（T/T）——訂單確認時支付 30%，出貨前支付 70%。.