進口超高壓球閥(Flange high pressure ball valve)—美國威盾VTON,采用一體式高壓鍛造閥體,適用于Class 150~2500LB,工作溫度-28~300℃的石油、化工、火力電站等各種工況的管路上,其安全、耐惡劣環(huán)境性等的設計均已進行特殊考慮,適用介質(zhì)為:水、蒸汽、油品、尿素等腐蝕性和強氧化性介質(zhì)。操作方式有:手動、氣動、電動、液動和氣液聯(lián)動等。
High pressure ball valve, one-piece high-pressure forged valve body, in Class 150 ~ 2500LB Operating Temperature -28 to 300 ° C in the petroleum, chemical, fire station and other conditions of the pipeline, its safety, resistance to harsh environments such as design have been special consideration, suitable medium: water, steam, oil, nitric acid, acetic acid, urea and other corrosive and strong oxidizing medium. The mode of operation: manual, pneumatic, electric, hydraulic and gas-liquid interaction.
進口法蘭高壓球閥特點:
1、進口法蘭高壓球閥中腔停滯的壓力異常超過彈簧的預緊力時,閥座后退脫離球體,達到自動泄壓的效果,卸壓后閥座自動復位。
2、當萬一發(fā)生火災或由于異常升溫使閥座密封圈燒損或軟化時,在彈簧和介質(zhì)壓力作用下,使支撐圈球面部位和球體形成金屬對金屬接觸,達到暫時密封作用,阻止了火災進一步擴大,符合API 6FA的規(guī)定。
3、進口法蘭高壓球閥的填料壓蓋部位密封采用PTFR填料和0形密封圈雙重密封圈,特別適用于氣體介質(zhì),填料裝在填料盤內(nèi),可隨時采用摩擦系統(tǒng)低的新型SF型自潤滑滑動軸襯,減低操作力矩。
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