Bray's Series 3A/3AH resilient seated butterfly valve is a Double Flanged design which can be used for dead-end service. A major design advantage of Bray valve product lines is international compatibility. The same valve is compatible with most world flange standards – ASME Class 125/150, BS 10 Tables D and E, BS 4504 NP 10/16, DIN ND 10/16, AS 2129 and JIS10. In addition, the valves are designed to comply with ISO 5752-Table 2 (EN558 Table 13) face-to-face and ISO 5211 actuator mounting flanges. Therefore, one valve design can be used in many different world markets.

[A] STEM: Precision double "D" disc to stem connection drives the disc without the need of screws or pins. 

[B] SEAT: Bray's bonded seat design lowers torque and provides complete isolation of flowing media from the body. The seat also features a molded O-ring which eliminates the use of flange gaskets. 

[C] STEM RETAINING ASSEMBLY: The stem is retained in the body by means of a unique Stainless Steel Spirolox® retaining ring, a thrust washer and two C-rings, manufactured from brass as standard, stainless steel upon request. The retaining ring may be easily removed with a standard hand tool. The stem retaining assembly prevents unintentional removal of the stem during field service. 

[D] STEM BUSHING: Non-corrosive, heavy duty acetal bushing absorbs actuator side thrusts. 

手動法蘭蝶閥廣泛適用于各種不同類型工業(yè)管道中液體和氣體(包括蒸 氣)的輸送，特別是具有嚴(yán)重腐蝕性介質(zhì)的使用場合，如：硫酸、氫氟酸、磷酸、氯氣、強(qiáng)堿、王水等具有強(qiáng)腐蝕性的介質(zhì)。

產(chǎn)品特點：

襯氟蝶閥在管路中除了起切斷和截流用外,近年來已經(jīng)把密封性能作為評價的主要指標(biāo),受到市場的青睞.另外,蝶閥還有體積小、重量輕、結(jié)構(gòu)簡單的優(yōu)點,與同參數(shù) 閘閥比較,平均減輕重量達(dá)30-50％,蝶板旋轉(zhuǎn)90°即可實現(xiàn)啟、閉過程,又由于轉(zhuǎn)軸兩側(cè)蝶板受介質(zhì)作用力近似相等,轉(zhuǎn)矩相反,因此啟閉力矩較小.