Globe valve advantages and disadvantages: (1) Advantages 1, simple structure, manufacturing and maintenance more convenient. 2, small work schedule, opening and closing time is short. 3, good sealing, sealing surface friction, longer life expectancy. 4, cut-off valve body structure of the straight-through type, direct current and right angle. Straight-through is the most common structure, but its resistance to fluids is greatest. Direct flow fluid resistance is small, more for solid particles or viscous fluid. Right-angle valve body forgings, for smaller, higher pressure of the globe valve. (2) Disadvantages 1, fluid resistance, the required force to open and close larger. 2, does not apply to the particles with a larger viscosity, easy to coking medium. 3, adjust the performance is poor. 4, the type of cut-off valve stem thread position by male and female thread type. By media flow points, there are straight-through, DC and angle. Globe valve by sealing form points, there are packing seal globe valve and bellows seal valve. 5, Bellows seal globe valve with bellows seal design, completely eliminate the common valve stem packing leak fast aging leak, not only improve the use of energy efficiency, increase the safety of production equipment and reduce maintenance costs and frequent Maintenance, but also provides a clean and safe working environment. Advantages 1, double seal design (bellows + packing) If the bellows failure, stem packing will be avoided; 2, the external leakage, and in line with international standards for sealing; 3, no fluid loss, reduce energy losses, improve plant equipment Safety; 4, long service life, reduce maintenance times, reduce operating costs; 5, rugged bellows seal design to ensure zero stem leakage, providing maintenance-free conditions. The type of stop valve by the position of the threaded stem is externally threaded type, the female type. By media flow points, there are straight-through, DC and angle. Globe valve by sealing form points, there are packing seal globe valve and bellows seal valve.
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