Vacuum Valve - Gate Valve ( HV series )

Description : 
HV series valves are rotary action, linear travel gate valves. The gate carriage moves in the valve body on a set of wheels, moved back and forth by a manual or pneumatically-actuated valve steam. To close the valve, the carriage moves forward on wheels until it reaches the end of the valve case. When the carriage stops, the sine waved rotary linkage continues to travel and extend.The gate does not move forward, only upward toward the port seal surface. There is no abrasion or damage to the O'ring. 

The gate moves up to the port into its sealing position. The O'ring is compressed, making a leak-tight seal. The sine waved rotary linkage continues to move forward until the linkage reach bottom dead end and locks, providing positive closure protection in the event control power, or air pressure, is lost.