1、双向密封性能优良，扭矩值小。 2、流量特性趋于直线，调节性能好。 3、法兰连接安装便捷，立式、卧式安装均可。 4、密封副材料的多样性，可供用户选择。 5、阀门可用于管端作放空阀用，性能可靠。 6、阀座密封圈与阀体有机地结合为一体，使阀门具有较长的使用寿命。 1. Both sides of sealing performance are choiceness and the torque is small.2. Flow curve tending to straight line. Excellent regulated performance.3. Flange connection installed easily. Both vertical and horizontal installation are all right.4. Have multiplicity-sealing materials for user choose.5. The valves can used for pipe nozzle and have reliable performance. Seat sealing and body are combined very well, and let that have a quit long use lifetime.