Zhengzhou discharge ball valve|Zhengzhou adjustment ball valve|Zhengzhou pressure gauge ball valve
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Ball Valve Principle The ball valve is derived from the cock . Its opening and closing member acts as a ball , which is opened and closed by rotating the ball 90o around the axis of the valve stem . Ball valve for cutting off the main pipeline, distribution and change the direction of flow of the medium, designed as a ball valve V-shaped opening also has a good flow regulation. Ball valve not only simple structure, good sealing performance, and to some nominal range pass through the small volume, light weight, low material consumption, small dimensions, and the driving torque is small, easy to operate, easy to open and close fast, ball valves One of the varieties of valve that has developed zui in the past ten years. Especially in the developed countries of the United States, Japan, Germany, France, Italy, West, Britain and other industries , the use of ball valves is very extensive , the variety and quantity of use continue to expand , and to high temperature, high pressure, large mouth, high sealing, longevity Life, excellent regulation performance and the development of a multi-valve direction , its reliability and other performance indicators have reached a high level , and has partially replaced the gate valve , globe valve , throttle valve . With the technological advances of the ball valve in the foreseeable short-term see, especially in the oil and gas pipelines, refinery cracker and the nuclear industry will have a wider range of applications. In addition , in the large and medium-sized, medium and low pressure areas of other industries , ball valves will also become one of the leading valve types. Â Ball valve is a valve according to the advent of the 1950s, in half a century, the ball valve has developed into a major valves. The ball valve is mainly used to cut off or turn on the medium , and can also be used for fluid regulation and control . The V -type ball valve can perform more precise flow regulation and control , while the three-way ball valve is used to distribute the medium and change the flow direction of the medium.
The advantages of the ball valve are suitable for frequent operation , quick opening and closing , light weight , small fluid resistance , simple structure , small relative volume , light weight , easy maintenance , good sealing performance , no restriction on the installation direction , the flow direction of the medium can be arbitrary , no vibration , The noise is small.
Ball valve defects Ball valve installation and maintenance should pay attention to the following matters , to leave the position of the valve handle rotation , can not be used for throttling , the ball valve with the transmission mechanism should be installed upright.
The electric ball valve is suitable for two-way cutting and adjustment. The connection between the valve and the actuator is directly connected . The electric actuator has a built-in servo system . It does not need to be equipped with a servo amplifier . It can be controlled by inputting 4-20mA signal and 220VAC power supply. The utility model has the advantages of simple connection , compact structure, small size, light weight, small resistance and stable and reliable operation.
Pneumatic valve using the new GT series pneumatic actuator, a double-acting and single-acting spring return, rack and pinion, safe and reliable; AW series of large diameter valves using pneumatic actuator fork-type transmission, reasonable structure, the output torque Large , double acting and single acting.
The three-way ball valve has T -shaped and L -shaped . The T -shaped can make three orthogonal pipes communicate with each other and cut off the third channel , which can split and merge . The L -shaped can only connect two pipes that are orthogonal to each other , and cannot be maintained at the same time. The third pipe is connected to each other and only acts as a distribution.
The four-way ball valve has small fluid resistance: the cross section of the connecting pipe between the sphere and the valve body is equal , and the spherical passage is connected by a circular arc , and the fluid resistance is small when the medium passes through the sphere . Sealing performance , the valve seat adopts PTFE material with certain elastic deformation and high strength , which achieves good sealing performance and ensures the stability of the valve. The service life is long , the valve core and the light neck material of the valve are made of austenitic stainless steel , and the valve seat material is made of PTFE, which can achieve good corrosion resistance and prolong the service life of the valve.
The heat preservation ball valve has good heat preservation and cold preservation characteristics, and the diameter of the valve is consistent with the pipe diameter, and at the same time, the heat loss of the medium in the pipeline can be effectively reduced. Mainly used in petroleum, chemical, metallurgy, pharmaceutical, food and other systems to transport high viscosity medium that will solidify at room temperature.
The fixed ball valve divides the valve body into two parts along the cross section perpendicular to the valve channel axis. The whole valve is symmetrical around the central axis of the valve stem. It is mainly used to cut, distribute and change the medium flow on the pipe. direction. Its large pivot structure ensures accurate center position of the ball under high pressure, ensuring good operation performance of the valve. The standard valve seat adopts spring structure to push the valve seat to the ball body, ensuring good bi-directional sealing performance of the inlet and outlet. With the discharge valve, the cavity of the valve body can be discharged to the outside, the pivot shaft adopts the anti-blowing protection structure, which effectively prevents leakage, and the bearing with low friction coefficient makes the torque reduced to small, which facilitates the opening and closing of the valve; the valve stem and the valve body Effective contact makes the anti-static grounding device superior in performance.
The floating ball valve is used to cut off or connect the medium in the pipeline. Different materials can be used for water, steam, oil, liquefied gas, natural gas, coal gas, nitric acid, acetic acid, oxidizing medium, urea and other media. In various valves, the flow resistance of the ball valve is small. When the full-diameter ball valve is opened, the ball passage, the valve body passage and the connecting pipe are equal in diameter and formed into a diameter, and the medium can flow almost without loss.
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Zui big valve wholesale base in South China
Intestinal localization was administered to reduce adverse effects.
Targeted site-specific release:
Two hours in gastric juice will not disintegrate or crack, dissolve within thirty minutes of disintegrating juice, providing a perfect solution for protein and peptide drugs and probiotics.
Enteric coated gelatin hollow capsule is made of gelatin and enteric coating material in gastric juice it will not collapse, but will release in the intestines as a collapse of a target product . It is often used for special packaging of drugs and health cae products which are irritating to the stomach or unstable under acid, or dissolved and effected in the intestine.
Intestinal location administration can improve the efficacy of drugs, reduce the dose and the adverse reaction, brings the convenience to patients. Moreover , it can avoid the degradation of gral protein, polypeptide or health care products and provide the best absorption sites for them.
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