Brass Globe ValveThe structural forms of the globe valve body are straight-through, straight-through and right-angle. Straight-through type is a common structure, but its fluid resistance is large; The right-angle valve body is mostly forged, which is suitable for globe valves with smaller diameter and higher pressure.
Advantages:
1. It occupies a small space and can be arranged on a compact pipeline, such as a nuclear power pipeline;
2. Due to the short opening and closing time of the valve door, it can be used for emergency cut-off;
3. The internal structure is relatively simple and easy to maintain; the body is simple, and the casting and forging process is good.
4. The sealing surface is not easy to wear. Whether it is a lift rod or a rotary rod globe valve, the sealing surface has almost no relative friction at the moment of opening and closing.
Disadvantages of brass globe valve:
1. The flow capacity of the straight-through stop valve is poor, and the corners of the flow channel cause large flow resistance. The relative flow capacity of the DC globe valve is better, but it is still not as good as the traditional gate valve and ball valve.
2. The straight-through globe valve is not easy to seal, the external force applied needs to overcome the medium force, and the specific pressure required for sealing can form a seal.
3. Lifting rod globe valve, the service life of packing is short.
The straight-through globe valve is easy to form turbulent flow, which has a large erosion on the valve seat.