進口液氮用電磁閥的分類及選型依據(jù)德國洛克 

一、進口液氮用電磁閥結構特點：

1、經(jīng)過低溫深冷處理，能耐-196℃低溫

2、獨特設計、壽命超長、性能穩(wěn)定、密封性好、開關迅速。

3、獨特設計、外觀精美；活塞結構、性能穩(wěn)定；低溫材料、密封性好專制線圈、不易燒毀。

4、閥芯均為不銹鋼活塞式,活塞環(huán)用特殊耐低溫、耐磨材料制作:活塞與金屬閥腔不產生直接摩擦,閥體安裝方向無限制；特制線圈,不易燒毀；長時間停止動作重新啟動,作同樣靈敏。

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

2. Unique design, long service life, stable performance, good sealing and quick switching.

3. Unique design, beautiful appearance; piston structure, stable performance; low temperature material, good sealing performance, autocratic coil, not easy to burn.

4. The valve core is stainless steel piston type, and the piston ring is made of special low temperature resistant and wear-resistant materials: the piston and metal valve chamber do not have direct friction, the installation direction of the valve body is unlimited; the special coil is not easy to burn; it stops and restarts for a long time, which is equally sensitive.

二、進口液氮用電磁閥工作原理：

常閉：當線圈通電時，先導閥芯吸合，先導孔打開，閥上腔卸壓，活塞靠下腔介質壓力推動，電磁閥打開；當線圈斷電時，先導閥芯靠彈簧復位，先導孔關閉，閥腔由活塞節(jié)流孔增壓和復位彈簧的推力，電磁閥關閉。

常開：當線圈通電時，先導孔關閉，閥上腔由活塞節(jié)流孔增壓和復位彈簧的推力，電磁閥關閉。當線圈斷電時，先導閥芯靠彈簧復位，先導孔打開，閥上腔卸壓，活塞靠下腔介質壓力推動，電磁閥打開。

Normally closed: when the coil is energized, the pilot valve core is closed, the pilot hole is opened, the upper chamber of the valve is depressurized, the piston is pushed by the medium pressure of the lower chamber, and the solenoid valve is opened; when the coil is powered off, the pilot valve core is reset by the spring, the pilot hole is closed, the valve chamber is pressurized by the piston orifice and the thrust of the reset spring, and the solenoid valve is closed.

Normally open: when the coil is energized, the pilot hole is closed, the upper chamber of the valve is pressurized by the piston orifice and the thrust of the return spring, and the solenoid valve is closed. When the coil is powered off, the pilot valve core is reset by the spring, the pilot hole is opened, the pressure in the upper chamber of the valve is released, the piston is pushed by the medium pressure in the lower chamber, and the solenoid valve is opened.

三、進口液氮用電磁閥產品簡介：

德國《LOCKE》洛克進口液氮用電磁閥是指閥芯由經(jīng)低溫深冷處理不銹鋼制成，密封件采用特種耐低溫材料，最低溫度可達-196度，有線圈驅動閥門開關，可實現(xiàn)對低溫介質的遠程自動化控制的閥門，適用于對液氮介質的開啟和關閉。

"Locke" imported solenoid valve for liquid nitrogen in Germany refers to the valve core is made of stainless steel with low temperature and cryogenic treatment, the seal is made of special low temperature resistant material, the minimum temperature can reach - 196 degrees, and the valve switch driven by coil can realize remote automatic control of low temperature medium, which is suitable for opening and closing of liquid nitrogen medium.

四、進口液氮用電磁閥規(guī)格參數(shù)：

Product specification: DN 1 ～ DN 500

Valve body material: stainless steel

Applicable media: liquid nitrogen, liquid ammonia, natural gas, refrigerant, corrosive fluid, etc

Temperature range: - 220 ℃～ + 350 ℃

Medium viscosity: less than 50c st (customized when greater than)

Protection performance: waterproof, explosion-proof (Exd iict5), anti-corrosion

Wiring mode: terminal type; lead type; plug type

Control mode: normally open and normally closed

Power supply voltage: DC12 ~ 127V; ac36 ~ 380V

Connection mode: internal thread, flange and external thread

Leakage: Zero