力士樂 泵 A4FO250 30R-PPB25N00
力士樂 泵 A4FO250 30R-PPB25N00
電磁換向閥:德國哈威HAWE電磁換向閥G系列閥體用的是全鋼制作,受壓力比較強(qiáng),密封好,不滲漏,正常使用的情況下,壽命也相對較長,是非常好的閥門。一般閥門在壓力沖擊對閥體的影響表現(xiàn)在運(yùn)作的時候外表會產(chǎn)生細(xì)微的裂紋,全額作用壓力之下更為明顯。而哈威電磁換向閥G系列是不會出現(xiàn)這種情況的,它可以避免這種情況的出現(xiàn),因?yàn)?/span>G系列換向閥的閥體內(nèi)孔所用的是金剛衍磨。閥心經(jīng)過淬硬和磨削,再經(jīng)過拋光去掉所有的毛刺,閥心經(jīng)過這一系列的打磨,其圓度和精度很好,密封間隙距離恰當(dāng),能確保泄露小。
無壓力的零部件的鑄造材料一般為鋅和鋁的模壓鑄件,像殼體、彈簧蓋、地板等等。當(dāng)然也可以提供墨鑄鐵做的手動操縱機(jī)構(gòu)殼體,這樣的殼體在惡劣工況下或者閥串聯(lián)鏈接時使用。
在電磁閥的生產(chǎn)材料中,橡膠是一個*的材料。所以對橡膠性質(zhì)的了解,是區(qū)別不同電磁閥特性的重要依據(jù)。NBR丁晴橡膠(nitrilebutadienerubber)耐油性,耐磨性較高,耐熱性較好,粘接力強(qiáng)。其缺點(diǎn)是耐低溫性差、耐臭氧性差,電性能低劣,彈性稍低。此外,它還具有良好的耐水性、氣密性及優(yōu)良的粘結(jié)性能。橡膠具有優(yōu)良的耐油性,其耐油性僅次于聚硫橡膠和氟橡膠,并且具有的耐磨性和氣密性。丁晴橡膠的缺點(diǎn)是不耐臭氧及芳香族、鹵代烴、酮及酯類溶劑,不宜做絕緣材料。EPDM三元乙丙橡膠(Ethylene-Propylene-DieneMonomer)EPDM最主要的特性就是其*的耐氧化、抗臭氧和抗侵蝕的能力。
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