針閥 · 儀表針閥（needle gauge）
多通口鎖定閥帽針型儀表閥
多通口鎖定閥帽針型儀表閥使壓力錶、變送器或其他儀表在不洩壓管線的情況下被隔離、更換與校準：鎖定閥帽提供確定隔離，三個出口通口安裝儀表組。基準頁將該結構額定至 6,000 psig（413 bar）與 -100 至 1200 F（-73 至 648 C），孔口 0.250 吋，端接尺寸 1/4、1/2 與 3/4 吋，閥體 316 SS、Alloy 400 與 Alloy C-276，PTFE 或 Grafoil 填料，端接為螺紋、焊接與卡套，三通結構另有 4 與 6 吋加長入口。
屬於 儀表針閥（needle gauge） 系列
最後更新： 2026-11
規格
| description spec | Multi-port gauge valve: locked bonnet isolation plus three instrument outlet ports |
|---|---|
| Pressure Rating | Up to 6,000 psig (413 bar) |
| Service temperature range | -100 to 1200 °F (-73 to 648 °C) |
| stem options | Metal seal: vee tip, Soft seal: PCTFE tip |
| Valve body material | 316 SS, Alloy 400, Alloy C-276 |
| Packing Materials | PTFE, Grafoil |
| orifice sizes | 0.250 in |
| end connection sizes | 1/4 in, 1/2 in, 3/4 in |
| End connection types | MNPT, FNPT threaded, pipe socket weld, pipe butt weld, manufacturer compression and grip-type tube ends |
| extended inlets | 4 in and 6 in extended inlets on three-port gauge valves |
應用與選型指引
Select this execution anywhere instruments hang off high pressure process lines - gauge isolation for calibration, transmitter mounting with a vent or second instrument, or any three-port instrument takeoff that must be serviced live. Choose the body alloy against the medium (316 SS general, Alloy 400 for HF and seawater, Alloy C-276 for oxidizing acids) and specify extended inlets where the valve must stand off insulated or hot pipework. Confirm the sour gas option against NACE MR0175 / ISO 15156 where the medium carries H2S.
常見問題
Why a multi-port gauge valve instead of a simple needle valve and root valve?
The multi-port execution carries the isolation bonnet and three instrument outlets in one body, so gauge replacement, transmitter mounting and calibration connections all land on factory-designed ports instead of field-assembled fitting clusters. Fewer joints at 6,000 psig is a direct leak-rate reduction, and the ports line up the instrument without bracketing.
What sizes and connections does the range cover?
End sizes 1/4, 1/2 and 3/4 in with a single 0.250 in orifice. Connections cover MNPT and FNPT threaded pipe ends, pipe socket weld and pipe butt weld, plus manufacturer compression and grip-type tube ends, and 4 or 6 in extended inlets are available on the three-port gauge valves for insulated or hot-line stand-off.
Is the execution suitable for sour gas service?
Yes - materials selected in accordance with NACE MR0175 / ISO 15156 are available for sour gas service, specified as an option to the part number. State the H2S service requirement with the inquiry so the correct material package is confirmed at quotation.
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。