Inspection before valve installation

①仔細(xì)檢查核對(duì)閥門(mén)型號(hào)、規(guī)格是否符合圖紙要求。

① Carefully check whether the valve model and specification meet the drawing requirements.

②檢查閥桿和閥瓣開(kāi)啟是否靈活，有無(wú)卡住和歪斜現(xiàn)象。

② Check whether the valve stem and disc can be opened flexibly and whether they are stuck or skewed.

③檢查閥門(mén)有無(wú)損壞，螺紋閥門(mén)的螺紋是否端正和完整無(wú)缺。

③ Check whether the valve is damaged and whether the thread of the threaded valve is straight and complete.

④檢查閥座與閥體的結(jié)合是否牢固，閥瓣與閥座、閥蓋和閥體,閥桿與閥瓣的聯(lián)結(jié)。

④ Check whether the connection between the valve seat and the valve body is firm, the connection between the valve disc and the valve seat, the valve cover and the valve body, and the connection between the valve stem and the valve disc.

⑤檢查閥門(mén)墊料、填料及緊固件(螺栓)是否適合于工作介質(zhì)性質(zhì)的要求。

⑤ Check whether the valve padding, packing and fasteners (bolts) are suitable for the nature of the working medium.

⑥對(duì)陳舊的或擱置較久的減壓閥應(yīng)拆卸，灰塵、砂粒等雜物須用水清洗干凈。

⑥ The pressure reducing valve that is old or has been used for a long time shall be disassembled, and the dust, sand and other sundries must be cleaned with water.

⑦清除通口封蓋，檢查密封程度，閥瓣必須關(guān)閉嚴(yán)密。

⑦ Clean the port cover and check the sealing degree. The valve flap must be closed tightly.

閥門(mén)的壓力試驗(yàn)

Pressure test of valve

低壓、中壓和高壓閥門(mén)要進(jìn)行強(qiáng)度試驗(yàn)和嚴(yán)密性試驗(yàn)，合金鋼閥門(mén)還應(yīng)逐個(gè)對(duì)殼體進(jìn)行光譜分析，復(fù)查材質(zhì)。

Low pressure, medium pressure and high pressure valves shall undergo strength test and tightness test. Alloy steel valves shall also undergo spectral analysis on the shells one by one and recheck the materials.

1.閥門(mén)的強(qiáng)度試驗(yàn)

1. Strength test of valve

閥門(mén)的強(qiáng)度試驗(yàn)是在閥門(mén)開(kāi)啟狀態(tài)下試驗(yàn)，檢查閥門(mén)外表面的滲漏情況。PN≤32MPa的閥門(mén)，其試驗(yàn)壓力為公稱壓力的1.5倍，試驗(yàn)時(shí)間不少于5min，殼體、填料壓蓋處無(wú)滲漏為合格。

The strength test of the valve is conducted when the valve is open to check the leakage of the external surface of the valve. For valves with PN ≤ 32MPa, the test pressure is 1.5 times of the nominal pressure, the test time is not less than 5min, and the valves are qualified if there is no leakage at the shell and packing gland.

2.閥門(mén)的嚴(yán)密性試驗(yàn)

2. Tightness test of valve

在閥門(mén)完全關(guān)閉狀態(tài)下進(jìn)行的試驗(yàn)，檢查閥門(mén)密封面是否有滲漏，其試驗(yàn)壓力，除蝶閥、止回閥、底閥、節(jié)流閥外的閥門(mén)，一般應(yīng)以公稱壓力進(jìn)行，在能夠確定工作壓力時(shí)，也可用1.25倍的工作壓力進(jìn)行試驗(yàn)，以閥瓣密封面不漏為合格。

When the valve is fully closed, check whether there is leakage on the sealing surface of the valve. The test pressure of valves other than butterfly valves, check valves, bottom valves and throttle valves should generally be at the nominal pressure. If the working pressure can be determined, the test can also be conducted at 1.25 times of the working pressure. If the sealing surface of the valve disc does not leak, it is qualified.

以上就是為大家介紹的有關(guān)良工閥門(mén)的詳細(xì)的介紹,希望對(duì)您有所幫助.如果您有什么疑問(wèn)的話,歡迎聯(lián)系我們.我們將以的態(tài)度,為您提供服務(wù)http://firstpet.com.cn

The above is a detailed introduction to Lianggong Valve, and we hope it will be helpful to you. If you have any questions, please contact us. We will provide you with our attitude http://firstpet.com.cn