德國洛克進口升降式止回閥

一、進口升降式止回閥結構優(yōu)點：

進口升降式止回閥的結構一般與截止閥相似，其閥瓣沿著通道中以線作升降運動，動作可靠，但流體阻力較大，適用于輕小口徑的場合。升降式止回閥可直通式和立式兩種。直通式升降止回閥一般只能安裝在水平管路，而立式升降止回閥一般就安裝在垂直管路。

The structure of the imported lift check valve is generally similar to that of the stop valve. The valve disc moves up and down in line along the passage, which is reliable, but the fluid resistance is large, so it is suitable for light and small caliber occasions. Lift check valve can be straight through type and vertical type. The straight lift check valve can only be installed in the horizontal pipeline, while the vertical lift check valve is generally installed in the vertical pipeline.

二、進口升降式止回閥描述：

德國LOCKE洛克進口升降式止回閥瓣沿著閥體垂直中心線滑動的止回閥，升降式止回閥只能安裝在水平管道上，在小口徑高壓止回閥上閥瓣可采用圓球。閥瓣上部和閥蓋下部加工有導向套簡，閥瓣導向簡可在閥盞導向簡內自由升降，當介質順流時，閥瓣靠介質推力開啟，當介質停流時，閥瓣靠自垂降落在閥座上，起阻止介質逆流作用。升降式止回閥的閥體形狀與截止閥一樣，因此它的流體阻力系數(shù)較大。升降式鑄鋼止回閥可適用于水、蒸汽、氣體，升降式不銹鋼止回閥可選用腐蝕性介質、食品、油品、藥品等。

The lift check valve imported from Locke lock in Germany slides along the vertical center line of the valve body. The lift check valve can only be installed on the horizontal pipeline, and the disc can be a ball on the small caliber high-pressure check valve. The upper part of the disc and the lower part of the bonnet are processed with a guide sleeve. The guide sleeve of the disc can freely rise and fall in the guide sleeve of the disc. When the medium flows in the same direction, the disc is opened by the medium thrust. When the medium stops flowing, the disc falls on the valve seat by the self suspension, which plays a role in preventing the medium reverse flow. The body shape of lift check valve is the same as that of stop valve, so its fluid resistance coefficient is large. The lifting type cast steel check valve can be used for water, steam and gas. The lifting type stainless steel check valve can be used for corrosive medium, food, oil, medicine, etc.

三、進口升降式止回閥選型：

1.升降式止回閥操作介質性質、溫度、壓力；

2.升降式止回閥公稱通徑以及與管道的連接方式；

3.升降式止回閥閥門的殼體和內件的材料；

4.確定升降式止回閥的幾何參數(shù)。

1. Nature, temperature and pressure of operation medium of lift check valve;

2. Nominal diameter of lift check valve and connection mode with pipeline;

3. Materials of shell and internals of lift check valve;

4. Determine the geometric parameters of the lift check valve.

四、進口升降式止回閥技術參數(shù)：

1、口徑：DN15-1000，1/4-100寸

2、壓力：PN0.6-PN320；Class150LB-2500LB；JIS10K-20K

3、溫度：-196℃-550℃

4、閥體材質：鑄鐵，球鐵，鑄鋼，不銹鋼，鉻鉬鋼

5、密封面：堆焊鉻不銹鋼、堆焊硬質合金、鉻鎳鈦不銹鋼

6、墊片：鋼帶石墨參纏繞、聚四氟乙烯

7、連接方式：法蘭，螺紋、焊接

8、使用介質：水、蒸汽、油品等

1. Caliber: dn15-1000, 1 / 4-100 inch

2. Pressure: pn0.6-pn320; class150lb-2500lb; jis10k-20k

3. Temperature: - 196 ℃ - 550 ℃

4. Valve body material: cast iron, nodular iron, cast steel, stainless steel, chrome molybdenum steel

5. Sealing surface: hardfacing chromium stainless steel, hardfacing hard alloy, chromium nickel titanium stainless steel

6. Gasket: steel belt graphite, PTFE

7. Connection method: flange, thread, welding

8. Use medium: water, steam, oil, etc