優(yōu)質(zhì)進(jìn)口低溫止回閥認(rèn)準(zhǔn)德國洛克

一、進(jìn)口低溫止回閥規(guī)格參數(shù)：

1、尺寸規(guī)格：DN10～DN200；

2、溫度范圍：-196℃～80℃；

3、壓力范圍：PN1.6～PN10.0Mpa；

4、閥體閥蓋：特種低溫鋼；

5、閥座閥芯：鍛造低溫鋼、四氟；

6、連接方式：德標(biāo)/國標(biāo)/美標(biāo)、法蘭、焊接、內(nèi)螺紋；

7、適用范圍：液態(tài)天然氣、已烯、二氧化碳、液氨、液氧、液氮、液氫等低溫介質(zhì)

8、應(yīng)用場合：氣體液化設(shè)備、空分設(shè)備；天然氣液化、儲(chǔ)運(yùn)設(shè)備；液態(tài)氧、氮、氬、氫、二氧化碳低溫貯槽及槽車；變壓吸附制氧、氮設(shè)備。

1. Size: DN 10-dn200;

2. Temperature range: - 196 ℃ - 80 ℃;

3. Pressure range: pn1.6 ~ pn10.0mpa;

4. Valve body and cover: special low temperature steel;

5. Valve seat and valve core: Forged low temperature steel, PTFE;

6. Connection mode: German standard / national standard / American Standard, flange, welding, internal thread;

7. Application scope: liquid natural gas, hexene, carbon dioxide, liquid ammonia, liquid oxygen, liquid nitrogen, liquid hydrogen and other low-temperature media

8. Application: gas liquefaction equipment, air separation equipment; natural gas liquefaction, storage and transportation equipment; liquid oxygen, nitrogen, argon, hydrogen, carbon dioxide cryogenic storage tanks and tank cars; pressure swing adsorption oxygen and nitrogen equipment.

二、進(jìn)口低溫止回閥產(chǎn)品簡介：

德國LOCKE洛克進(jìn)口低溫止回閥主要用于各種低溫介質(zhì)的管路系統(tǒng)，以防止介質(zhì)倒流，具有開關(guān)靈活、密封可靠的特點(diǎn)。廣泛用于乙烯，液化天然氣等化工裝置上，天然氣LPG LNG儲(chǔ)罐，接收基地及衛(wèi)星站，空分設(shè)備、石油、化工尾氣分離設(shè)備、液氧、液氮、液氫、二氧化碳低溫貯槽及槽車、變壓吸附制氧等工況的管路系統(tǒng)，可廣泛用于≤-46℃氨液、氨、丙烷；≤-101℃乙烯、二氧化碳；≤-196℃甲烷、氮?dú)?、液化天然氣?/font>

The low temperature check valve imported from Germany lockle is mainly used in the pipeline system of various low-temperature medium to prevent medium backflow. It has the characteristics of flexible switch and reliable sealing. Widely used in ethylene, liquefied natural gas and other chemical plants, natural gas LPG LNG storage tank, receiving base and satellite station, air separation equipment, petroleum and chemical tail gas separation equipment, liquid oxygen, liquid nitrogen, liquid hydrogen, carbon dioxide low temperature storage tank and tank car, pressure swing adsorption oxygen production and other working conditions of pipeline system, can be widely used in ≤ - 46 ℃ ammonia liquid, ammonia, propane; ≤ - 101 ℃ ethylene, carbon dioxide; ≤ - 196 ℃ methane, nitrogen, liquefied natural gas.

三、進(jìn)口低溫止回閥安裝與維護(hù)：

1、本閥門通路兩端須堵塞，存在干燥通風(fēng)的室內(nèi)。如長期存放，應(yīng)經(jīng)常檢查防銹蝕。

2、安裝前應(yīng)將閥門清洗干凈，并消除在運(yùn)輸過程中造成的缺陷。

3、安裝時(shí)必須仔細(xì)核對閥門上的標(biāo)志和銘牌是否符合使用要求。

4、升降式垂直瓣止回閥應(yīng)安裝在垂直管道上。

5、升降式水平瓣止回閥應(yīng)安裝在水平管道上。

6、在管線中不要使止回閥承受重量，大型的止回閥應(yīng)獨(dú)立支撐，使之不受管系產(chǎn)生的壓力的影響。

7、安裝止回閥時(shí)，應(yīng)特別注意介質(zhì)流動(dòng)方向，應(yīng)使介質(zhì)正常流動(dòng)方向與閥體上指示的箭頭方向相一致，否則就會(huì)截?cái)嘟橘|(zhì)的正常流動(dòng)。底閥應(yīng)安裝在水泵吸水管路的底端。

8、通式升降式止回閥應(yīng)安裝于水平管路上,立式升降式止回閥和底閥一般安裝在垂直管路上,并且介質(zhì)自下而上流動(dòng)。

9、止回閥關(guān)閉時(shí)，會(huì)在管路中產(chǎn)生水錘壓力，嚴(yán)重時(shí)會(huì)導(dǎo)致閥門、管路或設(shè)備的損壞，尤其對于大口管路或高壓管路，故應(yīng)引起止回閥選用者的高度注意。

1. Both ends of the valve passage must be blocked, and there is a dry and ventilated room. If it is stored for a long time, it should be checked for rust.

2. Before installation, the valve shall be cleaned and the defects caused during transportation shall be eliminated.

3. During installation, it is necessary to carefully check whether the marks and nameplates on the valve meet the use requirements.

4. Lift type vertical disc check valve shall be installed in vertical pipeline.

5. Lift type horizontal disc check valve shall be installed on horizontal pipeline.

6. In the pipeline, do not make the check valve bear the weight, large check valve should be independently supported, so that it is not affected by the pressure produced by the pipeline system.

7. When installing the check valve, special attention should be paid to the flow direction of the medium. The normal flow direction of the medium should be consistent with the arrow direction indicated on the valve body, otherwise the normal flow of the medium will be cut off. The bottom valve should be installed at the bottom of the water pump suction pipe.

8. The general lifting check valve should be installed on the horizontal pipeline. The vertical lifting check valve and bottom valve are generally installed on the vertical pipeline, and the medium flows from bottom to top.

9. When the check valve is closed, there will be water hammer pressure in the pipeline, which will cause damage to the valve, pipeline or equipment in serious cases, especially for the large opening pipeline or high pressure pipeline, so it should be paid great attention by the check valve selectors.

四、進(jìn)口低溫止回閥結(jié)構(gòu)特點(diǎn)：

1、經(jīng)過低溫深冷處理，能耐-196℃低溫

2、閥瓣材料經(jīng)過鍍鉻或氮化處理，提高閥桿表面硬度，提高填料密封的可靠性。

3、用的墊片具有在常溫下、低溫狀態(tài)及溫度變化下能可靠密封性和復(fù)原性。

4、采用優(yōu)質(zhì)的德國LOCKE洛克各種零部件材料，能達(dá)到流體逆向零泄露，防止倒流。

1. After cryogenic treatment, it can withstand - 196 ℃ low temperature

2. After chromium plating or nitriding treatment, the surface hardness of valve stem is improved and the reliability of packing seal is improved.

3. The gasket can be reliably sealed and recovered under normal temperature, low temperature and temperature change.

4. Using high quality German locklock parts materials, it can achieve reverse zero leakage of fluid and prevent backflow.