The Bray Series 30/31 resilient seated butterfly valves deliver bidirectional bubble-tight shutoff and long-term reliability for a wide range of fluid handling systems. Designed with a one-piece wafer (30) or lug (31) body, these valves feature a high-strength through stem design and an internal disc-to-stem connection that eliminates leak paths and ensures dependable sealing performance.
- Safety & Certifications: NSF/ANSI 61 and 372 certified for potable water, CE/PED, SIL, ABS, Bureau Veritas, and DNV approvals.
- Performance: bubble-tight shutoff up to 175 psi (NPS 2–12) and 150 psi (NPS 14–20).
- Applications: potable water, HVAC, desalination, industrial fluid systems, and general process isolation.
- Design Benefits: molded O-ring seat, non-corrosive bushings, self- adjusting stem seal, and no field adjustment required.
With compatibility for ISO 5211 actuators, the Series 30/31 valves are easily automated for on-off or modulating service, making them a trusted solution for safe and efficient fluid handling worldwide.
NSF/ANSI 61 Certified Valves for Safe and Reliable Fluid Control
Series 30/31 Butterfly Valves: Proven Bi-Directional Shutoff for Critical Applications
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特点和优势
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A. 阀杆固定组件
通过一个独特的不锈钢Spirolox®卡簧、一个止推垫圈和两个C型环，将阀杆固定在阀体内。上述配件按标准由黄铜制造，也可根据需求提供不锈钢材质。只需使用标准手工工具即可轻松去掉卡簧。阀杆固定组装可防止在现场作业期间意外拆卸阀杆。
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B. 阀杆衬套
非腐蚀性重型缩醛衬套可吸收执行机构的侧推力。
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C. 阀杆填料
双“U”杯密封设计可进行自我调节，并提供双向的强力密封。
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D. 阀颈
加长阀颈可形成2英寸的管道隔离，便于安装执行机构。
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E. 阀板
铸件经过球面机械加工和手工抛光，可提供气泡级密封、最小扭矩和更长的阀座寿命。
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F. 阀体
单体式对夹或支耳结构。采用聚酯涂层，具有优异的耐腐蚀性。另有尼龙11涂层可供选择。
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G. 主密封和二级密封
这些阀杆填料可以防止管道介质接触到阀杆或阀体。主密封是通过与阀板毂的模压阀座平板进行干扰拟合来实现的。二次密封则是通过比阀座阀杆洞直径更大的阀杆直径来实现。
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H. 阀杆
采用精密的双“D”形阀板与阀杆连接来驱动阀板，而无需使用螺钉或销钉。以精密公差双“D”形式连接驱动阀门阀板是博雷阀门的独特设计。只需将阀杆抽出阀板即可拆卸博雷阀杆。
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I. 阀座
博雷舌槽粘接式阀座设计可降低扭矩，将流体介质完全与阀体隔离开。该阀座还配备模压O型圈，无需配备法兰垫片。
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博雷最先进的洁净室设施在全球范围内提供ISO 6级至ISO 9级的精密清洗，对阀门进行清洗、检查、装袋和贴标签，以满足最严格的全球标准，确保阀门无污染。
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