系列規格
| Nominal valve connection size | DN3–DN25 (1/8"–1") |
|---|---|
| Flow-orifice diameter range | 1.5–8 mm typical |
| Pressure Rating | up to 414 bar / 6,000 psi (MAWP stamped on nameplate) |
| Service temperature range | −54 °C to +232 °C with PTFE packing, up to +538 °C with graphite |
| End connection types | NPT or BSP (male/female), Compression tube ends 1/4"–1/2", Socket-weld and butt-weld on request, Panel-mount hardware |
| Flow Coefficient | Cv ≈ 0.05 to 1.8 (depends on orifice and tip) |
| Valve body material | 316 SS, Alloy 400, Alloy C-276 |
| Packing Materials | PTFE, PEEK, Graphite |
| Design standards | MSS SP-99, ASME B16.34 |
| Inspection and pressure-test standards | MSS SP-99 / ISO 5208 hydrostatic shell and seat tests |
| bonnet stem options | Screwed or union bonnet, Non-rotating stem, V-tip, regulating tip, or soft-seat tip, Anti-tamper or lockable handles |
| nva pressure rating | 6000 PSI (414 bar) standard; 10000 PSI on selected SKUs |
| nva temperature range | -65°F to 600°F (-54°C to 316°C) |
| nva size range | Imperial 1/8 to 1 inch; metric M6 to M28 |
| nva end connections | Double sleeve NPT thread; BW ends on selected SKUs |
| nva body materials | Copper, SS 316, carbon steel, and other special materials |
| nva flow capacity | 0.4 to 1.2 GPM |
| nva cone angles | 1:50 and 1:60 standard needle cone angles |
| nva seat materials | Soft seat materials such as tin and copper |
| nva seat sealing | Conical surface sealing between valve plug and seat; corrugated pipe stem-to-seat sealing |
| nva high pressure sku | 10000 PSI SS 316 needle valve, customized sizes, BW ends (SKU) |
| nva 304 sku | SS 304 needle valve, custom sizes, 3000 PSI, external thread (SKU) |
| nvb size range | 1/8 to 1 inch |
| nvb pressure rating | Pressure rating to 10,000 psi |
| nvb materials | Body 316 cold worked stainless steel; packing glass-filled Teflon; stem 17-4 PH |
| nvb stem tips | V-stem, regulating, and soft seat stem tips |
| nvb end connections | Male/female NPT, manufacturer tube fittings, and ISO threads from 1/8 to 1 inch |
| nvb npt mawp | NPT series MAWP up to 60,000 psig (4136 bar) |
| nvb temperature | -100°F to 600°F (-73°C to 316°C) |
| nvb body alloy options | Stainless steel, carbon steel, brass, and alloy 400 available |
| nvc pressure rating | Up to 6000 psig (413 bar) LN series; HLN severe-service series up to 10,000 psig (689 bar) |
| nvc temperature range | -100 to 1200°F (-73 to 648°C) on LN/HLN severe-service series |
| nvc packing | Live-loaded PTFE and PEEK chevron packing |
| nvc stem tip | Chrome-plated 316 SS vee-type and PCTFE soft-seat stem tips |
| nvc 400 series | 400 Series lower packing needle valves: working pressures up to 5000 psig, packing below stem threads |
| nvc 400 series flow | Orifice sizes up to 0.562 in. and end connections up to 1 in. (400 Series) |
| nvc 400 series specs | MAWP up to 5000 psig; temperature -40° to 450°F (-40 to 232°C); 316 SS V-Stem and PCTFE soft-seal; straight and angle patterns |
| nvc ln orifice cv | LN4: 0.156 orifice (max. Cv 0.34); LN6: 0.250 (0.85); LN8: 0.437 (2.18) |
| nvc patterns | Straight, angle, and gauge patterns |
| nvd pressure rating | Working pressures up to 6000 psig (413 bar) on O, 1, 18, 20, and 26 series |
| nvd temperature | Temperatures up to 600°F (315°C) |
| nvd packing | Live-loaded packing system |
| nvd stem designs | Vee stem all series; soft-seat all series; regulating stem on O, 1, and 18 series |
| nvd orifice | 1 series valves with orifice of 0.172 in. (4.4 mm) or 0.250 in. (6.4 mm) |
| nvd body materials | 316 SS, brass, steel, alloy 400 body materials |
| nvd end connections | Tube fittings 1/4 to 3/4 in. and 3 to 18 mm; female/male NPT 1/8 to 1/2 in.; female ISO |
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
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。
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。
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。
本系列的類型
類型
儀表針閥（needle gauge）
儀表針閥將壓力儀表與製程隔離，具三通與阻塞排放（block-and-bleed）設計，使壓力表與變送器可在不停管線的情況下拆卸或排放。產品範圍涵蓋螺紋區下方的活載閥桿填料、不可旋轉閥桿、工作壓力至 6000 psig（413 bar）、溫度 -73°C 至 648°C，閥體為 316 SS、Alloy 400 或 Al
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一體式閥帽針閥
一體式閥帽針閥服務於不希望頻繁維護填料的儀表與通用計量用途：閥帽與閥體一體成型，活載人字形填料在高循環與溫壓動態變化下維持閥桿密封。產品範圍涵蓋工作壓力至 6000 psig、-40°C 至 315°C 服務，閥體 316 SS、Alloy 400 或黃銅，鍍鉻 316 SS V 型或 PCTFE 軟密封閥針尖端，直通
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下部填料針閥
下部填料針閥將閥桿填料置於閥桿螺紋下方，使潤滑劑保留在螺紋上、腐蝕或磨蝕介質遠離螺紋——較大流量儀表用途的確定關斷。產品範圍涵蓋工作壓力至 5000 psig、-40°C 至 232°C 服務，316 SS 閥體直通或角式、316 SS V 型閥桿或 PCTFE 軟密封尖端、孔徑至 0.562 in.、端接至 1 in
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提升塞式儀表閥
提升塞式儀表閥採用軟密封直通提升塞內件而非針形閥桿，髒污或黏性介質可用通條疏通且閥座抗堵——這是高振動與壓力/溫度循環的油氣、化工與電力嚴苛服務中的儀表隔離閥。產品範圍涵蓋工作壓力至 6000 psig（413 bar）、-53°C 至 315°C 服務、Cv 至 1.65、孔徑 0.187 與 0.250、閥體與閥帽
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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 1
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