The advantages and disadvantages of the cut-off valve

The advantages and disadvantages of the cut-off valve

(1) Advantages

1, simple structure, manufacturing and maintenance more convenient.

2, the work schedule is small, opening and closing time is short.

3, good sealing, low friction between the sealing surface, long life.

4. The valve body has a straight-through, direct-flow, and right-angled structure. Straight through is the most common structure, but its fluid resistance is greatest. The DC type fluid has small resistance, and it is mostly used for fluids containing solid particles or with high viscosity. The right-angle valve body is mostly forged and is suitable for smaller pass-by valves and higher pressure shut-off valves.

(2) Disadvantages

1. The fluid resistance is large, and the force required when opening and closing is large.

2, does not apply to particles, viscosity, easy to coke the medium.

3, poor regulation performance.

4. The type of globe valve is divided into male thread type and female thread type according to the position of the stem thread. According to the flow direction of the media, there are straight-through, direct-flow, and angled. The shut-off valve is divided according to the form of the seal. There are packing seal cut-off valve and bellows sealed shut-off valve.

5. Bellows sealed globe valve adopts bellows seal design, which completely eliminates the shortcomings of common valve stem packing seal aging and leakage, not only improves the use of energy efficiency, increases the safety of production equipment, reduces maintenance costs and frequent Maintenance, but also provides a clean and safe working environment.

Use advantage

1. Double seal design (bellows + packing) If the bellows fails, stem packing will also be avoided;

2, external leakage, and in line with international sealing standards;

3, no fluid loss, reduce energy loss, improve plant equipment safety;

4, long service life, reduce the number of maintenance, reduce operating costs;

5. The robust bellows seal design ensures zero leakage of the stem and provides maintenance-free conditions.

The type of globe valve is divided into male thread type and female thread type according to the position of the stem thread. According to the flow direction of the media, there are straight-through, direct-flow, and angled. The shut-off valve is divided according to the form of the seal. There are packing seal cut-off valve and bellows sealed shut-off valve.