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管道中液體和氣體(包括蒸 氣)的輸送，特別是具有嚴重腐蝕性介質的使用場合，如：硫酸、氫氟酸、磷酸、氯氣、強堿、王水等具有強腐蝕性的介質。

產品特點：

襯氟蝶閥在管路中除了起切斷和截流用外,近年來已經把密封性能作為評價的主要指標,受到市場的青睞.另外,蝶閥還有體積小、重量輕、結構簡單的優點,與同參數 閘閥比較,平均減輕重量達30-50％,蝶板旋轉90°即可實現啟、閉過程,又由于轉軸兩側蝶板受介質作用力近似相等,轉矩相反,因此啟閉力矩較小.