a vacuum valve to roughly two kinds: one kind is isolated from the atmosphere and vacuum space after closing the switch valve, the other is a variable valve adjusting ventilation flow. The latter in the imported devices such as gas.

vacuum valves in general refers to pneumatic valve switch. The basic function of the valve is in the closing is isolated from the atmospheric and vacuum space.

( 1) The basic structure of the vacuum valve

( 1) sealing,

( 2) Drive shaft,

( 3) Cover the seal.

according to the structure of the three parts is different, be used in different vacuum field.

( 2) The valve in the form of a

there are four valves in general form, namely, Angle valve, butterfly valve, valve and gate valve. Various valves according to the application of the vacuum field and select

( 3) drive

the valve drive has two kinds of manual and automatic. Automatic valve is given priority to with compressed air driven, in part, a small Industrial Valves driven by electromagnet.

2。 Flow variable Industrial Valves

variable flow control valve is mainly used in the vacuum container gas import quantity and exhaust velocity control effectively.

( 1) Gas import valve

Industrial Valves, by controlling the oxygen free copper and hard alloy contact conduction rate to control the gas flow, high reliability. Traffic variable valve made of metal, can be baked can also cut off gas imports.

( 2) Circulation variable valve

this valve is installed between the vacuum chamber and exhaust pump, by adjusting the gas conduction rate to adjust exhaust velocity. Photo 1 is butterfly valve through the piston Angle change gas conduction rate adjustment.

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