1.檢查外觀(guān)和標識

1. Check the appearance and identification

在開(kāi)始校驗之前，要檢查閥的外觀(guān)和標識是否清晰可辨，以確保其符合相關(guān)規范和標準。這包括檢查閥門(mén)的型號、壓力等級、流量系數以及制造商信息等。如果發(fā)現任何損壞或模糊的標識，應及時(shí)修復或更換。

Before starting the verification, the appearance and identification of the safety valve should be checked to ensure that it complies with relevant specifications and standards. This includes checking the valve model, pressure rating, flow coefficient, and manufacturer information. If any damaged or blurred markings are found, they should be repaired or replaced in a timely manner.

2.清潔和潤滑

2. Cleaning and lubrication

在開(kāi)始校驗之前，應確保閥的內部和外部表面都干凈無(wú)塵，并且沒(méi)有堵塞或雜質(zhì)。另外，需要對移動(dòng)部件進(jìn)行潤滑，以確保其正常運行。使用適當的潤滑劑來(lái)潤滑密封面和工作部件，以減少摩擦和磨損。

Before starting the calibration, ensure that the internal and external surfaces of the safety valve are clean, dust-free, and free from blockages or impurities. In addition, it is necessary to lubricate the moving parts to ensure their normal operation. Use appropriate lubricants to lubricate the sealing surface and working parts to reduce friction and wear.

3.泄漏檢測

3. Leakage detection

泄漏是閥失效的常見(jiàn)原因之一。因此，在校驗過(guò)程中，需要進(jìn)行泄漏檢測，以確保閥的密封性能。可以使用氣體或液體來(lái)進(jìn)行泄漏測試，并根據相應的標準和規范來(lái)判定泄漏量是否在接受范圍內。如果發(fā)現泄漏問(wèn)題，應及時(shí)修理或更換閥。

Leakage is one of the common causes of safety valve failure. Therefore, during the verification process, leakage detection is necessary to ensure the sealing performance of the safety valve. Gas or liquid can be used for leak testing, and the leakage amount can be determined according to the corresponding standards and specifications to determine whether it is within the acceptable range. If leakage problems are found, the safety valve should be repaired or replaced in a timely manner.

4.校驗壓力和開(kāi)啟壓力

4. Verify pressure and opening pressure

校驗閥的壓力是非常重要的。，需要使用適當的工具，如壓力表，來(lái)測量閥的校驗壓力。校驗壓力通常是閥的設計壓力的一定百分比。同時(shí)，還需要校驗閥的開(kāi)啟壓力，在此壓力下，閥門(mén)應正常開(kāi)啟并釋放壓力。對于大型閥，可能需要專(zhuān)門(mén)的校驗設備和設施。

It is very important to verify the pressure of the safety valve. Firstly, it is necessary to use appropriate tools, such as pressure gauges, to measure the calibration pressure of the safety valve. The verification pressure is usually a certain percentage of the design pressure of the safety valve. At the same time, it is necessary to verify the opening pressure of the safety valve. At this pressure, the valve should open normally and release pressure. For large safety valves, specialized calibration equipment and facilities may be required.

5.調整和校正

5. Adjustment and correction

如果校驗結果顯示閥的開(kāi)啟壓力偏離預定值，可能需要進(jìn)行調整和校正。調整和校正包括改變彈簧的緊縮程度或更換彈簧以改變閥的開(kāi)啟壓力。此外，還應確保調整后的閥能夠在校驗壓力下正常工作，并能夠完全關(guān)閉，以防止過(guò)多或過(guò)少釋放壓力。

If the verification result shows that the opening pressure of the safety valve deviates from the predetermined value, adjustments and corrections may be necessary. Adjustment and correction include changing the tightness of the spring or replacing the spring to change the opening pressure of the safety valve. In addition, it should be ensured that the adjusted safety valve can function properly under the calibration pressure and be fully closed to prevent excessive or insufficient pressure release.