Product category:
Pneumatic Valves and Controls
News Release from: SMC Pneumatics (UK) | Subject: Series XGT
Edited by the Engineeringtalk Editorial
Team on 07 July 2003
Gate valve meets semiconductor demands
The series XGT high vacuum gate valve was developed in response to demands from the semiconductor industry.
The series XGT high vacuum gate valve was developed in response to demands from the semiconductor industry The new valve serves as a partition between, for example, a load lock chamber and transfer chamber, and a load lock chamber and process chamber - for wafers (8 and 12in)
This article was originally published on Engineeringtalk on 2 Feb 2001 at 8.00am (UK)
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There are no frictional movements inside the valve, between the gate's seal material and the seat surface (this is due to the linear motion opening/closing and clamping of the seat being performed separately by components dedicated for each action); therefore, no dust is generated.
In addition, an end lock mechanism, for opening/closing of the gate, keeps the position, even if the air supply is turned off.
A large seat force is obtained from a small diameter pneumatic cylinder, due to the lever principle and wedge effect, which is used for the seat and release forces of the valve.
The unit can withstand backpressure between atmospheric pressure and vacuum during maintenance, and gives a long life, withstanding around two million operation cycles.
Technical specifications include: operating temperature from 5 to 150C (60C or less for drive section); operating pressure 0.4 to 0.6Mpa; unrestricted pumping direction; end lock included; and an opening size of 46 x 236mm (series XGT0402) or 50 x 336mm (series XGT506).
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