Development of High Vacuum Baffle Valves
High vacuum baffle valve is gradually invading the market of other valves since its inception
The working principle of high vacuum baffle valve is that the valve plate is sealed up and down through the valve stem. There are three ways to drive the valve stem: manual, flashlight, and pneumatic. Manual transmission parts are mainly threaded structure. High vacuum baffle valve can also adopt flat cam structure. The structure diagrams of right-angle and straight-through high vacuum baffle valves are respectively. The manual dual-use transmission part is composed of a motor, a worm gear and a worm, and is equipped with a travel switch. When the high vacuum baffle valve is connected to the power, the motor rotates in a certain direction (such as the opening direction). The worm wheel and worm drive the valve stem to move upward to raise the valve plate. When the valve rises to a certain height, the travel switch automatically cuts off the power. The valve stem movement stops immediately and vice versa. When manual,
Release the hand wheel back cap and turn the hand wheel in a certain direction by hand. Figure 22-4 is the outline drawing of GDD type hand and electric high vacuum baffle valve. Pneumatic transmission parts use compressed dry air as the power, change the direction of the gas path through the electromagnetic reversing valve, push the cylinder piston to move up and down, and drive the valve stem to move up and down, so that the valve plate opens and closes, so as to achieve the purpose of connecting or stopping the air flow.
High vacuum baffle valve has two types: high vacuum baffle valve and ultra high vacuum baffle valve. High vacuum baffle valve is used in high vacuum system to switch on or off air flow. High vacuum baffle valve applicable pressure range: 1.3X10_4? 105Pa when shaft seal is rubber; 1.3X10-5? 105Pa when shaft seal is bellows structure. Job introduction
The cutoff airflow can be installed between the evacuated container (vacuum chamber) and the vacuum pump; or on the inlet and outlet containers for semi-continuous vacuum operation. The high vacuum baffle valve is used at a temperature of 20 to 80 ° C. It is not suitable for gases that are corrosive to ferrous metals or contain particulate dust.
- High vacuum baffle valve is mainly used to switch on or off air flow in ultra high vacuum system. The applicable medium is clean air or non-corrosive gas; the applicable temperature is when the valve is opened, the allowable baking temperature of the valve body is less than 150 ° C.
Vacuum plug valve has a series of advantages such as large conductance, good sealing performance, low air release rate, small volume, compact and reasonable structure, convenient operation, and optional installation position, large vacuum and ultra-high vacuum devices.
② Form and performance parameters
- The form and basic parameters of high vacuum plug-in valve have the industry standard (JB / T4077-91). The form and basic parameters of the standard high vacuum plug-in valve are applicable to 1.3X10-5? 1.0X105Pa
Vacuum system is a flapper valve used to open or block air flow. When opening the valve, the pressure difference between the two sides of the valve plate should be less than or equal to 2.7kPa.
High vacuum baffle valve is composed of Taiwan UM and LKR series intelligent actuators and three-way ball valve L and T type. It is a rotary cut-off regulating valve. . Widely used in the pipeline automation control of corrosive media such as gas, liquid, steam and oil.
High vacuum baffle valve 3 application areas
- High vacuum baffle valve for petrochemical industry
High vacuum baffle valve for petrochemical industry, usually used in chemical fiber industry, grease refining and other equipment systems. The valve is required to be used in both low vacuum and pressure systems. The pressure of the vacuum system is usually 0.005 ~ 0.133Pa, and the pressure of the pressure system is 1.0 ~ 4.0MPa. The structure is usually a DC type, Y-shaped vacuum globe valve. This vacuum valve is basically the same as a normal Y-type globe valve.
- 2.high vacuum baffle valve for metallurgical machinery industry
The metallurgical machinery industry usually uses vacuum or high vacuum baffle valves. High vacuum baffle valves are used in vacuum smelting, vacuum deoxidation, vacuum heat treatment, vacuum casting, and electrical insulation treatment of alloy steel. The structure of the vacuum valve is usually a flapper valve, a flap valve, a baffle valve and a vacuum butterfly valve.
3.High vacuum baffle valve for nuclear industry
Various types of vacuum valves are widely used in the nuclear industry. High-vacuum and ultra-high-vacuum valves are used in high-energy physics and controlled thermonuclear fusion research. High-vacuum and low-vacuum valves are used in isotope separation plants. The structure of the vacuum valve usually uses a metal bellows or a diaphragm as the valve stem sealing element, and requires a high cleanliness vacuum cut-off (throttle) valve.
High vacuum baffle valve has compact structure, beautiful appearance and good sealing performance. High vacuum baffle valve can switch the flow direction of the medium in the pipeline. It is also possible to connect or close two channels that are perpendicular to each other. The high vacuum baffle valve has beautiful appearance, compact and reasonable structure. The high vacuum baffle valve can not only switch the flow direction of the medium, but also connect the three channels to each other. Flexible control of the confluence or split of media in the pipeline.
