What are the advantages and disadvantages of threaded valves?

The advantages and disadvantages of the threaded valve are as follows:
First, the advantages of the threaded valve:
1. Simple structure, convenient manufacturing and maintenance.
2. The working stroke is small and the opening and closing time is short.
3, good sealing, small friction between sealing surfaces, long life.
Second, the shortcomings of the threaded gate valve:
1. The fluid resistance is large, and the force required for opening and closing is large.
2. It is not suitable for media with particles, high viscosity and easy coking.
3. The adjustment performance is poor.
Written in the end: the type of thread gate valve is divided into external thread type and internal thread type according to the position of the stem thread. According to the flow direction of the medium, there are straight-through, direct-current and angular. The shut-off valve is divided according to the sealing form, and there are a packing bellows gate valve and a bellows sealing globe valve.