A dual-semisphere check valve for fluid delivery system is composed of valve body, bottom and top valve seats, valve bonnet, flap, spool, sealing washer, rotary rod, pressure screw, handwheel and nut.

• 一种双半球截止阀，涉及各种流体输送系统截断或接通的装置。包括阀体、下阀座、上阀座、阀盖、阀瓣、阀芯、密封垫圈、旋转杆、压紧螺丝、手轮和螺母等。由于设置了两个阀座和双半球阀瓣，提高了外密封和内密封效果。