規格
| design | Full lift safety valve with rolled seat |
|---|---|
| Set pressure | 0.1–49 bar (CE) / 1–49.3 bar (ASME), 1.5–710 psig / 15–715 psig |
| Service temperature range | -270 to 450 °C (CE) / -268 to 538 °C (ASME) |
| Capacity Orifice | F to X |
| Nominal valve connection size | DN 20 to DN 400, NPS 3/4 to NPS 16 |
| flange class | PN 10 - PN 40 (DIN EN 1092), Class 150 - Class 300 (ASME B16.5) |
| Valve body material | Gray cast iron, Nodular cast iron, Carbon steel, Stainless steel |
| bellows material | Stainless steel, Elastomer |
| seat gasket | Metallic, Sealing plate, O-Ring |
| body material grades | 0.6025, 0.7043, 1.0619, 1.4408, Gr. 60-40-18, SA 216 WCB, SA 351 CF8M |
| End connection types | Flanged — DIN EN 1092 (DN 20 to DN 400) or ASME B16.5 (NPS 3/4 to NPS 16) |
| Pressure class / nominal rating designation | PN 10 - PN 40 (DIN EN 1092) / Class 150 - Class 300 (ASME B16.5) |
| flow diameter d0 | 18 - 295 mm | 0.71 - 11.61 in |
| overpressure | 5% pressure increase |
應用與選型指引
Choose the DIN EN 1092 PN 10-40 or ASME B16.5 Class 150-300 flange set against the piping standard, then size the orifice (F to X) for the required capacity at set pressure. Body materials span gray and nodular cast iron, carbon steel and stainless steel in listed grades (0.6025, 0.7043, 1.0619, 1.4408, Gr. 60-40-18, SA 216 WCB, SA 351 CF8M); bellows are stainless steel or elastomer, with metallic, sealing-plate or O-ring seat gaskets to match temperature and tightness requirements.
常見問題
What does the balanced bellows do in a safety valve?
The bellows isolates the disc and guide area from outlet pressure, so back-pressure — superimposed or built-up — no longer offsets the set point. The valve pops at its set pressure even where the discharge line runs at elevated pressure.
What size, set-pressure and temperature range does the Type 441/442 cover?
DN 20 to DN 400 (NPS 3/4 to 16) with orifices F to X; set pressure 0.1-49 bar in the CE configuration and 1-49.3 bar (1.5-710 psig) in the ASME configuration; service temperature -270 to 450°C CE / -268 to 538°C ASME.
Which flange standards and body materials are offered?
Flanges per DIN EN 1092 PN 10-40 or ASME B16.5 Class 150-300. Bodies in gray cast iron, nodular cast iron, carbon steel or stainless steel — listed grades include 0.6025, 0.7043, 1.0619, 1.4408, Gr. 60-40-18, SA 216 WCB and SA 351 CF8M — with stainless steel or elastomer bellows and metallic, sealing-plate or O-ring seat gaskets.
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。