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進口低溫不銹鋼止回閥德國洛克 物美價廉值得擁有

一、進口低溫不銹鋼止回閥結構特點：

1、經過低溫深冷處理，能耐-196℃低溫

2、閥瓣材料經過鍍鉻或氮化處理，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、低溫狀態及溫度變化下能可靠密封性和復原性。

4、采用優質的德國LOCKE洛克各種零部件材料，能達到流體逆向零泄露，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 locke parts materials, it can achieve reverse zero leakage of fluid and prevent backflow.

二、進口低溫不銹鋼止回閥產品簡介：

德國LOCKE洛克進口低溫不銹鋼止回閥是指依靠介質本身流動而自動開、閉閥瓣，用來防止介質倒流的閥門，又稱逆止閥、單向閥、逆流閥、和背壓閥。止回閥屬于一種自動閥門，其主要作用是防止介質倒流、防止泵及驅動電動機反轉，以及容器介質的泄放。止回閥還可用于給其中的壓力可能升至超過系統壓的輔助系統提供補給的管路上。止回閥主要可分為旋啟式止回閥（依重心旋轉）與升降式止回閥（沿軸線移動）。

進口低溫不銹鋼止回閥采用深冷不銹鋼為主體材料，完全避免使用過程中密封變形泄露，浸漬聚四氟乙烯的石棉為填料以柔性石墨為密封材料。這種材料對氣體、液體均不滲透在厚度方向有10%-15 %的彈性較低的緊固壓力就可達到密封,具有自潤滑性用作，填料可以防止填料與閥桿的磨損。

The low temperature stainless steel check valve imported from Germany locke refers to the valve which automatically opens and closes the valve disc depending on the flow of the medium itself, which is used to prevent the backflow of medium, also known as check valve, one-way valve, counter flow valve and back pressure valve. Check valve is a kind of automatic valve. Its main function is to prevent the reverse flow of medium, reverse rotation of pump and drive motor, and discharge of container medium. The check valve can also be used to supply the auxiliary system in which the pressure may rise above the system pressure. Check valve can be divided into swing check valve (rotating according to the center of gravity) and lifting check valve (moving along the axis).

The imported low temperature stainless steel check valve adopts cryogenic stainless steel as the main material, which can completely avoid the seal deformation and leakage in the process of use. The asbestos impregnated with polytetrafluoroethylene is used as the filler and flexible graphite as the sealing material. This material is impermeable to gas and liquid. It has 10% - 15% elasticity in the thickness direction and can be sealed with low tightening pressure. It has self-lubricating property. As a packing, it can prevent the wear of packing and valve rod.

三、進口低溫不銹鋼止回閥安裝與維護：

1,本閥門通路兩端須堵塞，存在干燥通風的室內。如長期存放，應經常檢查防銹蝕。

2,安裝前應將閥門清洗干凈，并消除在運輸過程中造成的缺陷。

3,安裝時必須仔細核對閥門上的標志和銘牌是否符合使用要求。

4,升降式垂直瓣止回閥應安裝在垂直管道上。

5,升降式水平瓣止回閥應安裝在水平管道上。

6,在管線中不要使止回閥承受重量，大型的止回閥應獨立支撐，使之不受管系產生的壓力的影響。

7,安裝止回閥時，應特別注意介質流動方向，應使介質正常流動方向與閥體上指示的箭頭方向相一致，否則就會截斷介質的正常流動。底閥應安裝在水泵吸水管路的底端。

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

9,止回閥關閉時，會在管路中產生水錘壓力，嚴重時會導致閥門、管路或設備的損壞，尤其對于大口管路或高壓管路，故應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. The valve should be cleaned before installation, and the defects caused during transportation should be eliminated.

3. Carefully check whether the signs and nameplates on the valve meet the use requirements during installation.

4. Lift type vertical disc check valve shall be installed on vertical pipe.

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

6. Do not make the check valve bear the weight in the pipeline. The large check valve should be independently supported to prevent it from being affected by the pressure generated 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 shall be installed on the horizontal pipeline, while 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 selector.

四、進口低溫不銹鋼止回閥規格參數：

Specification range: DN 10-dn200

Temperature range - 196 ℃～ 150 ℃

Pressure range: pn1.6 ~ pn10mpa

Valve body material: special low temperature steel

Valve cover material: special low temperature steel

The valve seat and core are forged with low temperature steel and PTFE

Application range: liquid nitrogen and industrial low temperature liquid.

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

Applicable medium: liquid natural gas, hexene, carbon dioxide, liquid ammonia, liquid oxygen, liquid nitrogen, liquid hydrogen and other low-temperature media

Applications: gas liquefaction equipment, air separation equipment; natural gas liquefaction, storage and transportation equipment; low temperature storage tanks and tank cars for liquid oxygen, nitrogen, argon, hydrogen and carbon dioxide; pressure swing adsorption oxygen and nitrogen production equipment.