Coating equipment vacuum flapper valve principle and scope

Coating equipment vacuum flapper valve principle, the use of: works vacuum flapper valve is the valve plate seal is achieved through the stem up and down movement. Driven movement of the spindle with a manual transmission parts, two flashlights, pneumatic three ways. Manual transmission parts to the main thread structure can also be used flat cam structure.

Dual manual transmission components, executed by electric, worm, worm component, and equipped with limit switches. , When the power is turned on, the motor in one direction (eg opening direction) by rotating worm, worm drive for the upward movement of the stem of the valve plate rises when the valve plate rise to a certain height, the trip switch automatically cut off power, stem movement stopped immediately, and vice versa. Manual, release the hand wheel back hat, hand in a certain direction to turn the hand wheel, Figure 3 GDD-type hand-in dual vacuum flapper valve outline drawing. Pneumatic transmission parts to compress air for thousands of operating power to change the direction of the gas path through the solenoid valve, push the cylinder piston moves up and down, up and down movement to drive the valve stem, the valve plate open and close, so as to achieve the purpose of turning or stopping the flow.

Vacuum flapper valve has a high vacuum and ultra-high vacuum flapper valve flapper valve two kinds. High vacuum flapper valve for high vacuum system is turned on or off airflow. Pressure range: When the rubber seal for 105 ~ 1.3 × 10-4Pa; when the bellows seal structure 105 ~ 1.3 × 10-5Pa. Working Medium temperature: -25 ~ 80 ℃ (nitrile rubber seals); - 30 ~ 150 ℃ (fluorine rubber seals). Body material: nickel-plated carbon steel or stainless steel; T- valve plate sealing material nitrile rubber or Viton. Ultra-high vacuum flapper valve for ultra-high vacuum system is turned on or off airflow. Applicable pressure range of 105 ~ 1.3 × 10-8Pa such as the valve open state, the baking temperature is less than 400 ℃, the body made of stainless steel; valve plate material for oxygen-free copper; seal at the seal material is stainless steel bellows. : Both the working medium vacuum flapper valve used for clean air or clean the valve non-corrosive gases. Not applicable long-term use in highly corrosive to metals offerings and dust particles containing state gas situation.

Because of the high vacuum flapper valve seal reliable, high conductance, good security and a manual, electric, gas control, etc., in various forms, complete specifications, Path to 150 ~ 120mm, reasonable structure, therefore, be widely used in large, medium-sized vacuum system into a variety of high vacuum apparatus, such as for vacuum coating apparatus, a vacuum heat treatment furnace, vacuum brazing, high-vacuum electron beam welding, ion beam etching equipment, space equipment.