Groove to show direction of the disc.定位槽，用于标识阀板流向方向。
Heat number and material certificate.附带炉批号及材质合格证明。
Threaded to make safe mounting of hand lever.带螺纹结构，保障手动操作杆安装牢固。
Top flange according to ISO5211, together with square stem, makes it suitable for direct mounting of actuators, without using bracket.顶部法兰符合 ISO5211 标准，搭配方轴设计，可直接安装执行器，无需额外支架。
Relief track on the mounting flange protect the actuator if over pressure or wear makes the valve leak.安装法兰设有泄压槽，当超压或磨损导致阀门泄漏时，可保护执行器。
Unique detail make it convenient for adding identification or manual book.专属结构设计，便于加装标识铭牌及配套说明书。
Weather sealing.户外耐候密封结构。
RPTFE/graphite bearings provide excellent support.增强聚四氟乙烯 / 石墨轴承，承载支撑性能优异。
GGG40 Ductile iron body, provides high mechanical properties.阀体采用 GGG40 球墨铸铁，机械强度高、性能稳定。
O-rings by upper and lower shaft, are extraordinary sealing to prevent leakage.阀杆上下位置均配置 O 型圈，多重密封，杜绝外漏。
Square transmission between disc and shaft is strong and reliable.阀板与阀杆采用方头传动，结构稳固、传动可靠。
UPR hard back ring for the seat, ensure good tolerances of sealing point, keep the rubber stationary even under vacuum conditions and let you mount the valve between flanges without seat displacement.阀座配备 UPR 硬质支撑背圈，保证密封面精度；真空工况下亦可固定橡胶阀座，法兰对夹安装时不会发生阀座移位。
Streamlined disc for better Kv with enough strength.流线型阀板设计，流通系数 Kv 更高，同时保证结构强度。
Unique curve slope reduce the torque and increase life time.独特弧形坡面结构，降低操作扭矩，延长使用寿命。
Wider sealing diameter together with the centering eyes of the valve, makes safe sealing for all kind of flanges.加宽密封直径 + 阀体定位凸台，适配各类法兰，密封安全可靠。
Unique solution on disc turning point with reinforced SS+PTFE bearing inside the disc, where rotation occurs. This reduce friction and ensure perfect centering and long lifetime together with the strong fixing shaft.阀板旋转支点采用专属优化结构，内置不锈钢 + 聚四氟乙烯加强轴承，减小摩擦；配合加固固定阀杆，确保精准对中、长久耐用。
Multi-standard alignment holes suitable for various standard of flanges: EN1092 PN10, PN16, ASME B16.5 Class150, JIS B2239 10K, 16K, BS10 Table D, Table E.多标准定位安装孔，兼容多种法兰标准：EN1092 PN10/PN16、ASME B16.5 150 级、JIS B2239 10K/16K、BS10 D/E 级。
Plug with O-ring as weather and secondary sealing.带 O 型圈密封堵头，兼具耐候防护与二次密封功能。
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