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鎖定閥帽針閥
鎖定閥帽針閥以機加工金屬接合面加鎖環將閥帽夾緊於閥體，振動、填料調整或閥桿過轉都無法使閥帽鬆脫——這是油氣、化工與電力裝置的嚴苛服務隔離與計量閥。產品範圍涵蓋 LN 服務至 6000 psig（413 bar）、-73°C 至 648°C，閥體 316 SS、Alloy 400 或 C-276，HLN 10K 線至 10000 psig（689 bar）316 SS，附各口徑孔徑/Cv 表、活載 PTFE/柔性石墨/PEEK 填料，以及不可旋轉、調節或計量閥桿。選型取決於壓力等級（6K 對 10K）、迴路所需孔徑/Cv 點，以及溫度對填料的選擇。多來源資料補充運行框架：涵蓋高振動、磨蝕/腐蝕介質與頻繁循環的嚴苛服務設計意圖、以獨立螺絲固定的鎖環閥帽（相較單螺帽聯管節閥帽）、帶壓系統中可在線調整的活載人字形填料、保持潤滑的硬化 17-4 PH 閥桿螺紋、跨循環保護閥座與閥桿尖端的不可旋轉下閥桿、全開時隔離填料的後座、聯管節/螺紋/鎖定閥帽分類、參考合金降額（Alloy 400 約 5,000 psig、鈦約 3,500 psig）、柔性石墨填料至 1,200°F（壓力隨溫度降低），以及依孔徑約 0.3 至 3.6 的系列 Cv 範圍。
屬於 針閥 系列
最後更新： 2026-10
系列規格
| Valve body material | 316 SS, Alloy 400, C-276 |
|---|---|
| Packing Materials | PTFE (Standard) and flexible graphite. PEEK packing is available for LN6 and HLN6 valves only. |
| Temperature (source-defined) | -73°C to 648°C (-100 to 1200° F) |
| ln pressure | up to 6000 psig (413 bar) |
| ln orifice cv | LN4: 0.156 orifice (0.34), LN6: 0.250 orifice (0.85), LN8: 0.437 orifice (2.18) |
| hln pressure | up to 10000 psig (689 bar) |
| hln orifice cv | HLN4: 0.156 orifice (0.34), HLN6: 0.250 orifice (0.85) |
| patterns | Straight, angle, gauge, block and bleed |
| stem types | Non-rotating vee, soft seal (PCTFE), regulating, metering |
| severe service design intent | LN Series Locked Bonnet Needle Valves are designed for severe service applications having pressures up to 6000 psig (413 bar), temperatures from -100 to 1200°F (-73 to 648°C), high vibration, abrasive/corrosive media, and frequent cycling. |
| lock ring construction | the bonnet is screwed into the valve body then locked in place with a lock ring secured with a separate screw. |
| union bonnet weakness | There is nothing to prevent the nut from accidental disassembly or from loosening due to vibration, and there is no positive visual indication that the nut is tight. |
| reliability feature set | LN Series features including live loaded chevron packing, non-rotating lower stem, and stem threads that are isolated from system media work together for leak-tight reliability, high cycle life, low torque operation and low maintenance. |
| non rotating stem benefit | Reduces packing maintenance because the stem does not rotate within the packing |
| in line packing adjustment | Allows in line packing adjustment in pressurized system |
| stem thread material | Reference stem threads in hardened 17-4 PH stainless steel |
| thread lubrication benefit | Retain lubricants for easy operation and longer cycle life |
| severe applications ref | LN Series valves are used in oil & gas exploration and refining, high pressure instrumentation, test stands, steam systems, high pressure control systems and many other applications. |
| code basis ref | Meets ASME B31.1 and B31.3 design pressure calculations |
| bonnet taxonomy | a union bonnet is joined to the body by a union nut, a screwed bonnet is threaded into the body, and a locked bonnet is threaded and then retained by a separate locking device. |
| alloy derating ref | Alloy 400 is rated lower (about 5,000 psig / 345 bar) and titanium about 3,500 psig (241 bar) on selected ranges. |
| graphite temp ref | Flexible graphite packing raises the upper limit to 1,200°F (649°C) on selected configurations, with the pressure rating reduced at temperature |
| cv span ref | Approximately 0.3 to 3.6, by orifice size (approximately 0.16 in. to 0.44 in., or 4 mm to 11 mm); larger on some designs |
| family disclaimer ref | Family ranges for comparison only, not simultaneous ratings. Exact pressure, temperature and flow are confirmed against the selected model, size, material and end connections. |
| union bonnet repack ref | The bonnet resists loosening under vibration and pressure pulsation, and the valve can be repacked without removing it from the line. |
| vernier principle | The virtue of the needle valve is from the vernier effect of the ratio between the needle's length and its diameter, or the difference in diameter between needle and seat. |
範圍與來源備註
| cv span | Cv span: reference locked-bonnet families reach Cv approximately 0.3 to 3.6 with orifices to 0.44 in., while the tenant LN tables top out at Cv 2.18 (LN8) - the reference envelope exceeds the tenant top orifice/Cv point. |
|---|---|
| alloy derating | Alloy derating: reference guidance derates Alloy 400 to about 5,000 psig and titanium to about 3,500 psig on selected ranges, while the tenant page states LN service up to 6000 psig across 316 SS, Alloy 400 and C-276 - the tenant band does not split pressure by body material. |
| temperature pressure coupling | Temperature/pressure coupling: reference flexible-graphite 1,200°F ratings carry an explicit pressure reduction at temperature, while the tenant -73°C to 648°C band is stated without a derating curve. |
| code basis | Code basis: reference executions declare ASME B31.1/B31.3 design pressure calculations, while the tenant page states no design-code basis. |
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
鎖定閥帽針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。
鎖定閥帽針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。
鎖定閥帽針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。