The Difference Between Globe Valve And Ball Valve

Apr. 08, 2020

Globe Valves, also known as gate valves, are forced-sealed valves, so when the valve is closed, pressure must be applied to the clapper to force the sealing surface to not leak. A ball valve is a valve whose opening/closing part (ball) is driven by a valve stem and rotates around the axis of the ball valve.

The working principle is different. When the medium of the cut-off valve enters the valve from the bottom of the valve flap, the resistance that the operating force needs to overcome is the friction force of the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is better than that to open the valve The force is large, so the diameter of the valve stem must be large, otherwise the failure of the valve stem bending will occur.

The Ball Valve can be used for fluid adjustment and control. The hard-sealed The v-shaped ball valve has a strong shear force between the V-shaped core and the metal seat of the surfacing hard alloy and is particularly suitable for fibers and tiny solid particles. And other media. The multi-way ball valve can not only flexibly control the merge, split and flow direction of the medium on the pipeline, but also close any one channel and connect the other two channels. For example, API Flange Ball Valve, this type of valve should generally be installed horizontally in the pipeline.

The application range is different. As one of the most important cut-off valves, the globe valve plays an important role in the aerospace field. As an important component of aerospace equipment, the shut-off valve realizes the functions of medium transportation, cut-off, and adjustment, and it is sealing performance directly affects the safe and reliable operation of the aerospace equipment. Studying the influencing factors and influencing laws of the sealing characteristics of a typical globe valve have guiding significance for the structural design of the valve sealing pair, thereby improving the sealing performance and reliability of the valve.

Ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, steel, and other industries, and occupy a pivotal position in the national economy. It has the action of rotating 90 degrees, the cock body is a sphere, with a circular through hole or channel passing through its axis.

API Flange Ball Valve

API Flange Ball Valve

According to the channel direction, globe valves can be divided into: straight-through globe valves, DC globe valves, angle globe valves, and plunger globe valves. According to the use, it can be divided into fluorine lined globe valve, needle valve, low-temperature globe valve, plunger valve, thermal insulation jacket globe valve, forged steel globe valve, oxygen special globe valve, bellows globe valve, etc.

Ball valves are divided into bypass valves, air valves, pressure relief valves, and sewage valves according to their functions. According to the transmission classification, it can be divided into a pneumatic ball valve, an electric ball valve, a hydraulic ball valve, a gas-hydraulic ball valve, an electro-hydraulic ball valve, and a turbine transmission ball valve. According to the classification characteristics, it is divided into floating ball valves, fixed ball valves, orbit ball valves, V-type ball valves, three-way ball valves, stainless steel ball valves, cast steel ball valves, forged steel ball valves, ash discharge ball valves, anti-sulfur ball valves, pneumatic ball valves, electric ball valves, cards Set of ball valves, welded ball valves, etc.

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