Features Of Floating Ball Valves
1, in a variety of valves, ball valve flow resistance is minimal, when the full diameter ball valve is opened, the spherical channel, Valve body channel and connection pipe diameter equal and into a diameter, the medium can almost no loss of flow 2, ball valve rotation can be all open, open and close quickly. Compared with the same specifications of gate valve, globe valve comparison, ball valve small size, light weight, easy to pipe installation 1, Advanced seat: Gathered many years of ball valve manufacturing experience and design of the seat, to ensure that the valve seal, friction coefficient is low, operating torque is small, a variety of seat materials, a wide range of adaptation. 2, switch unmistakable handle: the use of flat head stem, and the connection of the handle will not be misplaced, so as to ensure that the handle indicates the switch status and valve one speech. 3, locking device: In order to prevent the valve switch misoperation, in the valve fully open, all off the position has a locking hole to ensure that the valve is in the correct position. 4, Stem anti-fly structure: the stem for the lower load, to prevent pressure to fly out, at the same time after the fire, and the valve body to form metal contact, to ensure that the stem seal. 5, ball valve is with a round through the hole of the sphere as a opening and closing parts, in the stem driven by the sphere around the center of the stem for 0~90度 rotation, complete the opening and closing function, with a compact structure switch rapid characteristics, rotation 90 degrees, you can close the valve, cut off the pipeline media, spherical channel diameter and pipeline diameter is the same Stem for the next type, to eliminate the stem through the accident occurred, to ensure the use of safety.
Overview Of Floating Ball Valves
The sphere of the ball valve is floating, under the action of the medium pressure, the sphere can produce a certain displacement and press tightly on the sealing surface at the outlet end to ensure that the outlet end is sealed. The floating ball valve has the simple structure and good sealing, but the load of the sphere bearing the working medium is all passed to the outlet seal ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the spherical medium, and the sphere may shift when it is hit by a higher pressure. This structure is generally used in medium and low voltage ball valves. The main characteristics of the ball valve is its own compact structure, reliable sealing, simple structure, easy maintenance, sealing surface and surface is often closed state, not easy to be eroded by the media, easy to operate and maintain, suitable for water, solvents, acids and natural gas and other general working media, but also suitable for harsh working conditions of the media, such as oxygen, hydrogen peroxide Methane and ethylene, etc., are widely used in various industries. The ball valve body can be whole or combined.
Structure Of Fixed Ball Valve
The sealing is good, but the load of the sphere bearing the working medium is all passed to the outlet seal ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the spherical medium, and the sphere may shift when it is hit by a higher pressure. This structure is generally used in medium and low voltage ball valves. The sphere of the ball valve is fixed and does not produce movement after being pressed. Fixed ball valves are equipped with floating seat, after the media pressure, the seat is moved, so that the seal ring pressed on the sphere to ensure sealing. Bearings are usually fitted with the upper and lower axes of the sphere, with small operating torque and are suitable for high pressure and large caliber valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, and the emergence of oil seal ball valve, not only in the sealing surface pressure special lubricating oil, in order to form a layer of oil film, that is, enhance the sealing, but also reduce the operating torque, more suitable for high-pressure large-caliber ball valve.
Features Of Ball Valve Classification
Ball valve is divided into: floating ball valve, fixed ball valve, track ball valve, V-type ball valve, three-wire ball valve, stainless steel ball valve, steel ball valve, forging steel ball valve, ash discharge ball valve, anti-sulfur ball valve, pneumatic ball valve, electric ball valve, card set ball valve, welded ball valve. According to the shell/main material classification, the ball valve can be divided into: 1. Metal Materials valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium alloy valves, Monel valves, copper alloy valves, aluminum alloy valves, lead alloy valves and so on. 2. Metal Valve body lining valve: such as lining valve, fluorine-lined valve, lining lead valve, lining plastic valve, lining enamel valve. 3. Non-metallic materials valves: such as ceramic valves, glass valves, plastic valves. Domestic production ball valve manufacturers are more, the connection size is also mostly not uniform. Mainly divided into the following categories: The sphere of the ball valve is floating, under the action of the medium pressure, the sphere can produce a certain displacement and press tightly on the sealing surface at the outlet end to ensure that the outlet end is sealed.
Features Of Ball Valve Classification
Ball valve is divided into: floating ball valve, fixed ball valve, track ball valve, V-type ball valve, three-wire ball valve, stainless steel ball valve, steel ball valve, forging steel ball valve, ash discharge ball valve, anti-sulfur ball valve, pneumatic ball valve, electric ball valve, card set ball valve, welded ball valve. According to the shell/main material classification, the ball valve can be divided into: 1. Metal Materials valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium alloy valves, Monel valves, copper alloy valves, aluminum alloy valves, lead alloy valves and so on. 2. Metal Valve body lining valve: such as lining valve, fluorine-lined valve, lining lead valve, lining plastic valve, lining enamel valve. 3. Non-metallic materials valves: such as ceramic valves, glass valves, plastic valves. Domestic production ball valve manufacturers are more, the connection size is also mostly not uniform. Mainly divided into the following categories: The sphere of the ball valve is floating, under the action of the medium pressure, the sphere can produce a certain displacement and press tightly on the sealing surface at the outlet end to ensure that the outlet end is sealed.
Features Of Ball Valves
One; wear-resistant; because the valve core of hard seal ball valve is alloy steel spray welding, sealing ring is alloy steel surfacing, so hard seal ball valve in the switch will not produce too much wear. (It has a hardness coefficient of 65-70): Two; good sealing performance; Because the seal of the hard sealed ball valve is artificially ground, until the valve core is fully in line with the seal ring to be used. So his sealing performance is reliable. three; light switch; because the bottom of the sealing ring of the hard sealed ball valve uses a spring to hold the sealing ring tightly with the valve core, the switch is very light when the external force exceeds the preload of the spring. Four; Long service life: has been widely used in petroleum, chemical, power generation, paper, Atomic Energy, aviation, rockets and other departments, as well as people's daily life.
Basic Introduction Of Ball Valve
Spherical valves (ball valve in marine and marine fields should be cut-off valves), the standard gb/t21465-2008 "valve terminology" is defined as: the opening and closing parts (spheres) driven by the stem, and around the axis of the ball valve for rotational movement of the valve. It can also be used for fluid regulation and control, in which the hard-sealed V-shaped ball valve has a strong shear force between its V-type spherical core and the metal seat of the surfacing cemented carbide, and is particularly suitable for media containing fibers, tiny solid materials, etc. The multi-pass ball valve not only has the flexibility to control the convergence, shunt, and flow direction of the medium on the pipe, but also can close any channel and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. Ball valve classification: Pneumatic ball valve, electric ball valve, manual ball valve.
History Of Ball Valves
Spherical valve (ball valve) was introduced in the 1950s, with the rapid development of science and technology, production technology and product structure of continuous improvement, in a short period of 40 years, has rapidly developed into a major valve class. In the western industrially developed countries, the use of ball valves is rising year by year. In China, ball valves are widely used in petroleum refining, long-distance pipelines, chemical, paper, Pharmaceutical, water conservancy, electricity, municipal, steel and other industries, in the national economy occupies a pivotal position. It has the action of rotating 90 degrees, the plug body is a sphere, there is a circular through hole or passage through its axis. Ball valve in the pipeline is mainly used to cut, distribute and change the flow direction of the medium, it only needs to rotate 90 degrees of operation and a very small rotation torque can be closed tight. Ball valve is most suitable for switching, cutting valve use, V-type ball valve. Electric valve In addition to attention should be paid to the pipeline parameters, should pay special attention to its use of the environmental conditions, because the electric valve in the electric device is a mechanical and electrical equipment, its use of the State is greatly affected by its use of the environment. In general, electric ball valves and butterfly valves should be used with special attention in the following environments.
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