1.OS&Y, bolted bonnet, Flexible or solid wedge;

2.Welded or integral seat with hardfaced alloy steel is more abrasion resistance;

3.Ensured stem seals with flexible graphite packing and rugged gland;

4.As the medium flows in a smooth and straight channel, the flow resistance is small;

5.Unobstructed channel permits the maximum flow rate;

6.Linear type pneumatic actuators offer smooth opening and closing.